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WestEndAngler
MMT Moderator
Joined: Thu Mar 05, 2009 9:11 am Posts: 9143 Location: Houston | Surfside
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Marsh Mellow Exhaust on a GTR 35 - Install | Review
Got the exhaust on with no problems. Hopefully this will aid anyone looking at Marsh Mellows Exhaust. Tools needed: Basic socket set... Start by removing the old exhaust. Remove the 4 bolts holding the exhaust to the manifold, 12MM socket. Remove the brackets that are mounted to the engine. The whole stock exhaust assembly should come off easily once the bolts are removed. Remove the 4 bolts (two on each side of motor) that bolt into the governor. Hold a bracket up for a guide you'll figure out the two bolts on each side to remove. Here's a photo of the new bracket installed on the port side of the engine. The trick to installing is to take the 2 long bolts (supplied with exhaust) and put them through the bracket. Put two spacers (also supplied) between the governor assembly and the bracket. Between the bracket and the head of the bolt remember to put a lock washer. The above picture is of the two spacers installed, the bolts through there with lock washers and the small bolt with just a lock washer. The idea is that your compensating for the empty space so that the bracket will sit flush. The starboard side bracket is a little tricky. First in the top hole grab a lock washer and bolt. Put lock washer on put bolt through bracket. Place a spacer on the back side of the bracket (top hole). On the hole just below that do the same thing however you'll use an extra lock washer to take up the empty space. See this photo. Here's a picture of the starboard bracket installed: Both brackets installed: Install the flanges but leave them somewhat loose so you can get the muffler into them later don't forget to remove the old gaskets and install the new ones. Go ahead and take the exhaust and place the supports included in the kit on the exhaust take two of the hose clamps around the top support and two on the heat shield support. Snug but not tight so you can adjust it later. The Heat shield of course on the bottom and the smaller bracket on top. 4 Nuts and bolts in each will secure the supports to the brackets you installed earlier. The hose clamps go through the holes on the bottom of the heat shield and just around the bracket & barrel for the top. I opted to install the top support to the exhaust first and then I put the heat shield onto the brackets before putting the muffler and whole package together. Looking at the photos below I notice I put the heat shield hose clamps on wrong... It was getting dark and I got into a hurry. Please note that the hose clamps on the heat shield bracket should come into the bracket from the back and wrap around the muffler and back to the top, not around the bottom of the heat shield as shown below Leave everything loose so you can get the pipes to match up push in a hard as you can use a 2x4 and tap it in be careful not to "tap" to hard The exhaust sounds great. I have yet to run it on the water and will post up a performance review tomorrow. Here's a video of her running in the driveway, it was late sorry bad lighting but you just want the sound. http://www.youtube.com/watch?v=CL6eTIoA4m0Sounds quieter & cleaner than my stock exhaust but remember my brackets were broken both sides on my stock exhaust so I had a "ringing" going on for a long time... Hooray for silence! Oh, after install wipe the whole exhaust and brackets down with a rag with WD40 sprayed all over it. That way it wont spot on you when you get her heated up the first time.
_________________ GTB 1860 w/ 2019 GTR40XD-HO
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Fri Oct 30, 2009 7:11 pm |
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quackconsumer
MMT Elite Member
Joined: Wed Jan 14, 2009 7:54 pm Posts: 5582
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
You sure have been throwin alot of money into dat motor lately. Looks good. Let us know if dis makes dat gecker carb perform any better.
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Fri Oct 30, 2009 7:41 pm |
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WestEndAngler
MMT Moderator
Joined: Thu Mar 05, 2009 9:11 am Posts: 9143 Location: Houston | Surfside
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
I had money set aside for this exhaust for awhile just finally pulled the trigger... The saltwater has corroded my stock one to nothing! I will let you know how she runs tomorrow got 3 guys going with me!
_________________ GTB 1860 w/ 2019 GTR40XD-HO
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Fri Oct 30, 2009 8:04 pm |
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muddiejeep
MMT F.E.
Joined: Tue Jan 13, 2009 6:24 pm Posts: 761 Location: New Orleans, LA.
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Great explaination of install. I think this and your gecker thread should be in a tech forum.
_________________ When in doubt, throttle out. 18x60 prodrive w/36 prodrive
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Fri Oct 30, 2009 10:51 pm |
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WestEndAngler
MMT Moderator
Joined: Thu Mar 05, 2009 9:11 am Posts: 9143 Location: Houston | Surfside
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Exhaust performed great this morning! This along with Gecker carb bumped me up to 25 MPH with me and 2 other guys, full hunting gear and 2 dogs. Dumping the gear and running down inter-coastal I hit 28MPH with a friend and my dog. We dumped the gear and ran up the ICW before heading back to launch.
_________________ GTB 1860 w/ 2019 GTR40XD-HO
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Sat Oct 31, 2009 4:37 pm |
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quackconsumer
MMT Elite Member
Joined: Wed Jan 14, 2009 7:54 pm Posts: 5582
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
So what speds were you running before da carb and exhaust wit dis loads?
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Sun Nov 01, 2009 4:50 pm |
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WestEndAngler
MMT Moderator
Joined: Thu Mar 05, 2009 9:11 am Posts: 9143 Location: Houston | Surfside
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
23.
_________________ GTB 1860 w/ 2019 GTR40XD-HO
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Sun Nov 01, 2009 7:29 pm |
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Tulsa_Woody
MMT Pro Member
Joined: Wed Jan 14, 2009 8:31 am Posts: 428 Location: Tulsa, OK...Cajun by Marriage
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Westend, i hear that "ringing" on mine, but i can't seem to locate what is making it...my brackets all look good, but something is definitely rattling/ringing. Woody
_________________ 17x54 Gator-Tail w/ 35HP GTR Gator-tail/MM exhaust Center Console...it fixes tiller torque viewtopic.php?f=4&t=9330
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Mon Nov 02, 2009 10:18 am |
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Glider
MMT Pro Member
Joined: Mon Aug 17, 2009 4:39 pm Posts: 160 Location: Fort Payne, AL
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
It is probably an inside baffle. You should cut it out or replace before parts of it end up in your valves. http://www.refugeforums.com/refuge/show ... p?t=746288Thanks for the review Westend.
_________________ MarshMellow Performance
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Mon Nov 02, 2009 10:43 am |
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WestEndAngler
MMT Moderator
Joined: Thu Mar 05, 2009 9:11 am Posts: 9143 Location: Houston | Surfside
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
I have no more ringing... I did notice my brackets for stock exhaust were broken in 4 places on each mount... Also I lost a rivet on one of the brackets...
_________________ GTB 1860 w/ 2019 GTR40XD-HO
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Mon Nov 02, 2009 2:20 pm |
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MaXXis85
MMT Elite Member
Joined: Wed Jan 14, 2009 7:23 am Posts: 6233 Location: Tarkington, TX
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
spin your hose clamps so you dont have to look at the adusters. Put them behind the tubes it will look cleaner! Good job dude!
_________________ Bayou Surface Drive 337-351-0362 Tarkington, TX 77327
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Tue Nov 03, 2009 7:40 am |
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WestEndAngler
MMT Moderator
Joined: Thu Mar 05, 2009 9:11 am Posts: 9143 Location: Houston | Surfside
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Yeah those shots were taken just for the install and review purposes I've since moved everything around.
_________________ GTB 1860 w/ 2019 GTR40XD-HO
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Tue Nov 03, 2009 7:55 am |
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Gigafowl
MMT Elite Member
Joined: Tue Jan 13, 2009 7:19 pm Posts: 6441 Location: Trinity Bay - Texas
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
pasted from carb revue...
Stock Setup:
RPM out of water: 4250 Top Speed: 28 MPH (deep water) RPM @ Top Speed: ~3900
Gecker Stage II:
RPM out of water: 4250 Top Speed: 29.5 MPH (deep water) RPM @ Top Speed: ~3890
* * * * * * *
Were RPMs under load similar to before and speed greater ???
Your upgrades seem to be netting better performance without pushing the motor into higher RPMs....
Possibly sinking a bit more prop now at "sweet spot" ???
_________________ Eat - Sleep - Hunt ! ! !
"It is good to have an end to journey toward; but it is the journey that matters, in the end."
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Tue Nov 03, 2009 8:06 am |
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WestEndAngler
MMT Moderator
Joined: Thu Mar 05, 2009 9:11 am Posts: 9143 Location: Houston | Surfside
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
_________________ GTB 1860 w/ 2019 GTR40XD-HO
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Tue Nov 03, 2009 10:14 am |
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marshbyrd
MMT Pro Member
Joined: Thu Jul 30, 2009 9:53 pm Posts: 55 Location: Baton Rouge
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
thanks westend for the info and pics. Im pretty sure im going to go with the same setup.
_________________ just one more cast...
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Sun Nov 08, 2009 6:19 am |
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Over the LINE
MMT Addict
Joined: Mon Jan 19, 2009 5:22 am Posts: 535 Location: New Orleans
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Thanks,
Just finished my install and since it came with no instruuctions, I was grateful for your pics and step by step. I am sure I could have figured it out but man was it easy to follow your lead.
_________________ 17' CAT 5 with 37 GTR
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Mon Nov 16, 2009 6:08 pm |
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WestEndAngler
MMT Moderator
Joined: Thu Mar 05, 2009 9:11 am Posts: 9143 Location: Houston | Surfside
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
_________________ GTB 1860 w/ 2019 GTR40XD-HO
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Tue Nov 17, 2009 8:57 am |
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Robn1020
MMT 1000 Club
Joined: Mon Feb 16, 2009 6:09 pm Posts: 4232 Location: Cypress, TX
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Great explanation and pics. I just installed mine on a GDSD 35. My exhaust was a little different though. I had two identical pieces to fit the exhaust tubes to. Plus I had to use two spacers on both sides. Im thinking your exhaust has that bottom bracket a little different to prohibit extra heat from melting your clutch cover. Seriously, thanks for the step by step, it helped!
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Mon Mar 08, 2010 8:27 pm |
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Gigafowl
MMT Elite Member
Joined: Tue Jan 13, 2009 7:19 pm Posts: 6441 Location: Trinity Bay - Texas
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
_________________ Eat - Sleep - Hunt ! ! !
"It is good to have an end to journey toward; but it is the journey that matters, in the end."
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Mon Mar 08, 2010 8:34 pm |
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Robn1020
MMT 1000 Club
Joined: Mon Feb 16, 2009 6:09 pm Posts: 4232 Location: Cypress, TX
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Sure thing. In the second pic you can see how the mounting bracket differs for the GD. No plate on the bottom. Exhaust looks really clean and sounds great. Plus no more orange rust covered exhaust.
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Mon Mar 08, 2010 8:55 pm |
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WestEndAngler
MMT Moderator
Joined: Thu Mar 05, 2009 9:11 am Posts: 9143 Location: Houston | Surfside
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Don't forget the good coat of WD-40 before you crank it. Looks good.
_________________ GTB 1860 w/ 2019 GTR40XD-HO
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Mon Mar 08, 2010 10:18 pm |
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Robn1020
MMT 1000 Club
Joined: Mon Feb 16, 2009 6:09 pm Posts: 4232 Location: Cypress, TX
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Yeah, thanks again for the great post, pics, and instructions!
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Mon Mar 08, 2010 11:19 pm |
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Glider
MMT Pro Member
Joined: Mon Aug 17, 2009 4:39 pm Posts: 160 Location: Fort Payne, AL
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
I really need to make some instructions. Thanks West End.
Robin1020, your throttle cable looks really close to the exhaust header. I have mine loosely pull tied to the lifting bracket bolted to the valve cover if you have enough slack. Hope you like it.
_________________ MarshMellow Performance
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Tue Mar 09, 2010 8:06 am |
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Robn1020
MMT 1000 Club
Joined: Mon Feb 16, 2009 6:09 pm Posts: 4232 Location: Cypress, TX
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
It has about an inch to two inches of space between the pipe and cable. I guess from the pics it does look like its touching. Would you suggest moving it out more?
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Tue Mar 09, 2010 8:35 am |
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Glider
MMT Pro Member
Joined: Mon Aug 17, 2009 4:39 pm Posts: 160 Location: Fort Payne, AL
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Should be fine.
_________________ MarshMellow Performance
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Tue Mar 09, 2010 8:41 am |
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benelliman
MMT Addict
Joined: Wed Jan 14, 2009 10:54 am Posts: 532 Location: Livonia, La.
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
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Tue Mar 09, 2010 9:02 pm |
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craig
MMT Elite Member
Joined: Tue Jan 13, 2009 7:53 pm Posts: 7515 Location: Chauvin
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
_________________ 1750 GatorTail Extreme/Stage 3 37 GTR HD Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself.
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Tue Mar 09, 2010 9:07 pm |
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WestEndAngler
MMT Moderator
Joined: Thu Mar 05, 2009 9:11 am Posts: 9143 Location: Houston | Surfside
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
_________________ GTB 1860 w/ 2019 GTR40XD-HO
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Tue Mar 09, 2010 9:12 pm |
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Stihl Duck
MMT Pro Member
Joined: Mon Dec 20, 2010 9:23 am Posts: 143
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Need help, what is this part and where does it go?
No instuctions, but easy to install but this part stumps me.......Its a bracket for something. It does seem that I need i but want to make sure.
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_________________ Stump Jumper 17x54 w/duck deck GTR 35 stage II
Stump Jumper Rep. for IN (Stumpjumperboats.com) Athens archery Bowfishing Pro Staff/Field Rep.
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Fri Feb 25, 2011 7:53 pm |
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quackconsumer
MMT Elite Member
Joined: Wed Jan 14, 2009 7:54 pm Posts: 5582
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Dat is a cross brace. I think I have instructions and pics on how it is installed. I will try to find dem and pm dem to you tomorrow.
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Fri Feb 25, 2011 8:24 pm |
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Stihl Duck
MMT Pro Member
Joined: Mon Dec 20, 2010 9:23 am Posts: 143
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Cool, nothing like have'n no instructions but a few beers makes up for none.....
Oh, what a bad azz sound it gives off. Now, I just need the rest of my parts! They were supposed to be at more door step today, not!
_________________ Stump Jumper 17x54 w/duck deck GTR 35 stage II
Stump Jumper Rep. for IN (Stumpjumperboats.com) Athens archery Bowfishing Pro Staff/Field Rep.
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Fri Feb 25, 2011 8:44 pm |
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quackconsumer
MMT Elite Member
Joined: Wed Jan 14, 2009 7:54 pm Posts: 5582
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Could not find the directions. But the side with 2 holes goes on the right side (standing behind engine), sandwiched between the engine block and the exhaust bracket. The side with one hole is bolted to the left side exhaust bracket.
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Sat Feb 26, 2011 2:20 pm |
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Stihl Duck
MMT Pro Member
Joined: Mon Dec 20, 2010 9:23 am Posts: 143
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Thanks, got it!
Would ob f been better before I put it ALL together the first time......BUT it will go on alot quicker the 2nd!
_________________ Stump Jumper 17x54 w/duck deck GTR 35 stage II
Stump Jumper Rep. for IN (Stumpjumperboats.com) Athens archery Bowfishing Pro Staff/Field Rep.
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Sat Feb 26, 2011 4:37 pm |
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Glider
MMT Pro Member
Joined: Mon Aug 17, 2009 4:39 pm Posts: 160 Location: Fort Payne, AL
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
I do put instructions in normally. Sent out 4 the other day and realized it the next morning. It replaces one of the spacers. Sorry for the inconvenience
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_________________ MarshMellow Performance
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Sat Feb 26, 2011 7:01 pm |
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Stihl Duck
MMT Pro Member
Joined: Mon Dec 20, 2010 9:23 am Posts: 143
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Yep, thats how it looked the 2nd time around.....No problem, I put it all back on the 2nd time in LESS than half the time.
But not its now back firing and the neighbors came over with phone in hand. They thought there were gun shots at our house and wanted to check to see first, THANK GOD! Way 2 funny!
Waiting on my heads and carb from Keith. Hope that will help
_________________ Stump Jumper 17x54 w/duck deck GTR 35 stage II
Stump Jumper Rep. for IN (Stumpjumperboats.com) Athens archery Bowfishing Pro Staff/Field Rep.
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Sat Feb 26, 2011 7:34 pm |
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team_shine
MMT Member
Joined: Wed May 25, 2011 3:43 pm Posts: 11
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
im about to be getting a boat with dual GTR 35s and i was worried about the noise, did the exhaust help quiet the exhaust down considerably? or is it more of a performance upgrade? and these would be stock motors it would go on.
thanks paul
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Thu Jul 07, 2011 2:49 pm |
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WestEndAngler
MMT Moderator
Joined: Thu Mar 05, 2009 9:11 am Posts: 9143 Location: Houston | Surfside
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
_________________ GTB 1860 w/ 2019 GTR40XD-HO
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Thu Jul 07, 2011 2:55 pm |
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ineedmud
MMT Pro Member
Joined: Tue Aug 10, 2010 4:04 pm Posts: 116
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Glider,
Is that cross brace required for the GTR35 install? I don't think i saw it up top on WEA install instructions, but just want to double check.
I just purchased a second hand MM and am missing a couple spacers...left a voicemail with MM Exhaust this morning. Your instructions on the website show the use of 4 spacers, but i see up top that WEA only used 3...what do you recommend?
_________________ 2017 Prodigy 1751 w/ 2017 HDR44 GD 1860 w/ 2014 GTR 35 Stg 2 848 War Eagle w/2011 GTR 35 Stg 1
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Thu Sep 01, 2011 8:21 am |
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WestEndAngler
MMT Moderator
Joined: Thu Mar 05, 2009 9:11 am Posts: 9143 Location: Houston | Surfside
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
_________________ GTB 1860 w/ 2019 GTR40XD-HO
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Thu Sep 01, 2011 8:24 am |
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Glider
MMT Pro Member
Joined: Mon Aug 17, 2009 4:39 pm Posts: 160 Location: Fort Payne, AL
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Re: Marsh Mellow Exhaust on a GTR 35 - Install | Review
Yes, cross brace is needed. I am calling you now.
_________________ MarshMellow Performance
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Thu Sep 01, 2011 10:03 am |
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