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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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GTR Engine rpms
Hey guys, as most of you know, i had the CC installed and while i was at the shop, the guys swapped out the carb on the engine. I was having backfiring issues, rough idle, loping...they said it was the carb...after the swap, it ran like a top at the shop...but when i got out on the water, it sputtered a few times and then ran pretty good (i chalked it up to the carb just being installed)...and my rpms weren't where they had been before the swap and the cc. So i took the girls out fishing yesterday...8 gallons of gas, trolling battery up front...hardly a full load compared to times i've run with 3 "hogmallys"...i let the engine get warmed up and then adjusted the neutral rpms from 4050 up to 4200 (thanks owen for the picture on the other thread)...When i take off, the motor sounds good up to about 3000 rpms and then it feels like either a governer kicking in, or like it's getting too much fuel and choking itself...it never feels like it is wounding up totally...I never got the rpms above 3300...i trimmed up to where the prop would lose bite and i would slow down...i used to hit 3800 when in the sweet spot...worst case, loaded down with 12 gallons gas and 2 large guys + me (160ibs) i would still hit 3500-3600 rpms. I took a couple of videos...they are crude because i did them with my iphone...one is even sideways...but try to listen to the motor more than watch the vids. Oh, yeah, i had a fresh tank of 89 octane with some seafoam added. Also, the backfiring issue has returned. there are two videos...the first one you'll see and the other one is listed to the right and is 1.08 minutes. http://www.youtube.com/user/kurtiswwoodThanks, Woody
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Mon May 03, 2010 7:43 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: GTR Engine rpms
Woody I been thinking about it listened to the video at least 10x... If you think its not opening up all the way, then its probably not opening up all the way. How long does it take you to hit the governor when your WOT out of the water? Should be immediate you shouldn't have to work up to it at least not for very long. Perhaps the gasket slipped a little during installation or caught the butterfly & its now preventing them from opening up fully?? I know this happened when I was swapping carbs from Gecker back to Stock like 300x
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Mon May 03, 2010 9:50 am |
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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: GTR Engine rpms
I agree....Sounds like your carb. is not opening all da way.
_________________ 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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Mon May 03, 2010 9:56 am |
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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: GTR Engine rpms
So what do i need to do??? and Pics are helpful for my dumbass...should i remove the carb and reinstall...or just loosen and then tighten back down...i'm no gearhead or WEA when it comes to putting a wrench on it...i'm just worried i'll screw up the linkage etc. What would cause it to not be opening under a load and yet open when out of water. Woody
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Mon May 03, 2010 12:09 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: GTR Engine rpms
WEA, i remembered you have a write up on installing the gecker carb...so i'll take a look at the pics, but i'm not really sure what to look for...why would it reach 4200 WOT out of water, but not under the load. Woody
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Mon May 03, 2010 12:51 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: GTR Engine rpms
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Mon May 03, 2010 1:09 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: GTR Engine rpms
Yeah, i know i should be getting more rpms than that...usually when i take off, it runs right up to around 3800...now it runs to around 3000 then feels like something is choking it...then it responds a little and creeps up to that 3200-3300...i guess i'm going to have to take the pan off and run it at the lake and see what is going on...or maybe take a look and see if something is contricting the butterfly. woody
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Mon May 03, 2010 2:19 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: GTR Engine rpms
Could it be the throttle cable not opening up the carb all the way? Woody
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Mon May 03, 2010 2:21 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: GTR Engine rpms
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Mon May 03, 2010 2:36 pm |
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blaze
MMT Pro Member
Joined: Tue Jan 13, 2009 4:55 pm Posts: 340 Location: Outskirts of Chocolate City(Westwego)
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Re: GTR Engine rpms
If you put the steering, it very well could be. If GT put it in they should have got it right. I had to adjust mine a couple of times before it was opening all the way.
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Mon May 03, 2010 5:15 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: GTR Engine rpms
With the motor off push the throttle on the console WOT and then walk back to the motor and see if the linkage on the carb is WOT as well... if its not adjust it as mentioned above.
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Mon May 03, 2010 6:38 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: GTR Engine rpms
Hey Fellers...here is what i got for you...i brought the rig to the house and took off the air cleaner and dust pan...expose the carb...honestly, i don't know what to look for...so i took some video...i did try to adjust the throttle cable back by the engine, but it was as far out as it can go...and when i adjusted it, "in", rpms went down...so obviously not the correct thing to do...tell me what you guys think...i know it is difficult because the real problem is when i'm under a load...please help. Woody
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Fri May 07, 2010 6:54 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: GTR Engine rpms
Can anyone tell me how to adjust the throttle cable? 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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Sat May 08, 2010 10:11 am |
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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: GTR Engine rpms
Look at the back of the engine you will see where the throttle cable runs to the Carb throttle slider. Just before that there is a clamp that holds the cable in place. It's location changes the thottle open amount. Th clamp is just a screw and a plate that sandwiches the cable to secure it.
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Mon May 10, 2010 8:02 am |
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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: GTR Engine rpms
I'm pretty sure i monkeyed with that...took it out of the little holder and then tightened the screw and then put the cable back into the holder...rpms went down, so then i loosened it all the way that i could and it still be attached to the cable and then re-attached to the carb...rpms were back up, but it still needs some adjustment...i couldn't tell if the butterfly was all the way or not. Woody
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Mon May 10, 2010 8:57 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: GTR Engine rpms
Woody... Take another pic / video of where the linkage actually hits the carb. You are showing in the first video where the linkage and springs are... follow those two rods (linkage) back to the carb... The carb sits in the middle it has the black hose running into it (fuel) & on the starboard side of the motor you'll see 3 linkages that run to it... Watch the carb itself and where the linkage stops. You'll see the throttle lever moving open & close... You want it to be able to bottom out at WOT on the stop its attached on the carb... When relaxed the linkage resets and should bump up against your idle screw/ stop.
I'm headed to storage unit later today I'll open mine up and take a video of where you should be looking.
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Mon May 10, 2010 9:00 am |
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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: GTR Engine rpms
Thanks Coe, a video would help out tremendously. Woody
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Mon May 10, 2010 9:21 am |
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quackconsumer
MMT Elite Member
Joined: Wed Jan 14, 2009 7:54 pm Posts: 5582
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Re: GTR Engine rpms
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Mon May 10, 2010 6:34 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: GTR Engine rpms
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Mon May 10, 2010 7:09 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: GTR Engine rpms
No worries Coe, post it when you can. Thanks, 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 May 10, 2010 8:11 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: GTR Engine rpms
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Tue May 11, 2010 6:16 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: GTR Engine rpms
Wow, OK, that was not at all where i was looking...i totally get what your saying now on the WOT bumping that "stop"...i'll check that out first....there was some different kind of linkage i adjusted that I didn't see on yours...could be because of the remote steering/cc. Thanks for the video, that really helps...i'm going to my camp this weekend so i'll be tinkering with it, as well as installing that depth sounder...I'll post some videos if i have some problems. Thanks again, Woody
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Wed May 12, 2010 6:05 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: GTR Engine rpms
I probably should have taken a video of how quick mine bumps the governor... Not sure in your videos if you would just hit WOT and it would bump governor instantly or gradually work its way up... To me it was slowly getting there which it should work itself there fairly quick.
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Wed May 12, 2010 6:27 am |
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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: GTR Engine rpms
Took the rig out Sat. and once off the trailer i took off...only the boat would start to run up the rpms and then suddenly it would act as if someone pulled the choke and then just die down...could not plane off...rpms would never run up...so i put the tools to it and noticed that the nut that holds the choke in place had come off from behind it. Got that back on. Then checked my governer like WEA had showed me in his video...all good, even has a little mark on it from being hit. Cranks up and purrs like a kitten. So I put Humpty back together again and head out. Same thing, just bogs down right as i'm getting up on plane...
So i reach back and barely pull the choke out...WHAM! Motor jumps to life!! I mean running better than i had the last time i took it out. So took a zip tie and rigged it so that the choke couldn't fall back...But the question is, what is the real fix, obviously there is something to be adjusted and pretty simple, but i had everything back together and it was looking like rain at the time. [youtube]http://www.youtube.com/watch?v=J4XAMBLbeKI[/youtube]
[youtube]http://www.youtube.com/watch?v=yka-4b7iWFU&feature=channel[/youtube] 12 gallons gas, battery up front, cooler with 24 white bass...had it trimmed up in the sweet spot and was bumping 3700 rpms...So i've got it "rigged" but i'm looking to get the correct fix. 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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Sun May 16, 2010 2:58 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: GTR Engine rpms
LOL Woody... "Who are you talking to?" "Some friends..." I love it! I wonder if the choke cable got twisted? Do you have to choke the engine on the front of the cowling on the remote steers or is there a choke at the helm? Call Hoyt and ask him in the morning... Now that you found a fix ask him what you need to do to not have to use the zip tie.
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Sun May 16, 2010 3:01 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: GTR Engine rpms
Something happened to my other video...let's try this again...LOVE the steering!! So much better...just trolling along with the 4-year old steering while i'm "catching"! [youtube]http://www.youtube.com/watch?v=yka-4b7iWFU&feature=channel[/youtube] woody for some reason this one doesn't want to work with the new youtube feature. http://www.youtube.com/watch?v=yka-4b7i ... re=channel
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Sun May 16, 2010 3:44 pm |
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