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| 35 GDSD ? http://mudmotortalk.com/mmt_v2/viewtopic.php?f=3&t=13749 |
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| Author: | RB1 [ Sun Nov 14, 2010 1:41 pm ] |
| Post subject: | 35 GDSD ? |
18'x54" GDSD boat 35GDSD motor only getting 21mph empty and will hardly plain out w/ 3 people and a cooler, This boat is the same speed as my 18'x44" w/35LT with no load and slower with the same load. I changed the 3 blade out for the 2 blade it helped in the mud but not with the speed. This rig has sixty hours on it. I always hear about these fast SD's and the one I have is a turd, could this be a deffected motor, boat to heavy or do you have to mod. the SD's to get speed out of them ? I have talked to a couple of shops about the lack of performance, they all recommend I mod. the motor in one way or another. I just don't think this rig should be as slow as my LT if there is nothing wrong with the motor. |
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| Author: | broz [ Sun Nov 14, 2010 1:49 pm ] |
| Post subject: | Re: 35 GDSD ? |
That boat should be running atleast 26 mph empty if not 28-29. What rpm's are u running in the water? |
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| Author: | RB1 [ Sun Nov 14, 2010 1:53 pm ] |
| Post subject: | Re: 35 GDSD ? |
Ya, Thats what the dealer said. Turning 3900 in the water |
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| Author: | DuckHunterF250 [ Sun Nov 14, 2010 2:10 pm ] |
| Post subject: | Re: 35 GDSD ? |
whats the bottom of the boat look like? if it has some good hooks around the transom that will kill the performance of the rig |
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| Author: | broz [ Sun Nov 14, 2010 2:15 pm ] |
| Post subject: | Re: 35 GDSD ? |
If it's turning 3900 and you've gotten another prop. I would guess that the boat is hooked also. |
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| Author: | RB1 [ Sun Nov 14, 2010 2:50 pm ] |
| Post subject: | Re: 35 GDSD ? |
Hooked ? what am I looking for ? |
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| Author: | broz [ Sun Nov 14, 2010 2:54 pm ] |
| Post subject: | Re: 35 GDSD ? |
is the bottom of the boat dented significantly? usually right in front of the transom but not always. |
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| Author: | RB1 [ Sun Nov 14, 2010 3:32 pm ] |
| Post subject: | Re: 35 GDSD ? |
It has a slight wave to it nothing major, you really have to look to see it. I will slide it back on the trailer to get a better look. |
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| Author: | DuckHunterF250 [ Sun Nov 14, 2010 4:08 pm ] |
| Post subject: | Re: 35 GDSD ? |
just a little dent can cause quite a bit |
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| Author: | deadbird8 [ Sun Nov 14, 2010 7:41 pm ] |
| Post subject: | Re: 35 GDSD ? |
Have a compression and leak down test done. Leaking valves don't affect your top RPM but rob you of power. 1hr or 60 hrs- stock valves suck. If its still under warranty (2yrs) Briggs should deal with it. |
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| Author: | craig [ Sun Nov 14, 2010 7:49 pm ] |
| Post subject: | Re: 35 GDSD ? |
| Author: | swamphonkey [ Mon Nov 15, 2010 6:53 pm ] |
| Post subject: | Re: 35 GDSD ? |
I got a 16x60 with a 35 gdsd. 3 weeks old with a blind bag tackle box and 2 poles, I'm only getting 28 mph on gps thats open water with the wind in my favor. I was really hopeing for more. maybe they just bite! How much would a carb, air filter and pipes add? Is it worth the money? |
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| Author: | Noladucks1 [ Tue Nov 16, 2010 9:30 am ] |
| Post subject: | Re: 35 GDSD ? |
you were hoping for more, why cause a bunch of guys claim they run 30 with the same setup, but can't back it up with a GPS. I think that is a damun good speed. Dead on IMO |
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| Author: | Gigafowl [ Tue Nov 16, 2010 12:16 pm ] |
| Post subject: | Re: 35 GDSD ? |
FYI - guys a new prop is slower than a modestly worn one ! ! ! That is why I polish my new props.... Also a new engine is tight and max performance will be reached in about 30 to 50 hours too..... |
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| Author: | jn70549 [ Tue Nov 16, 2010 12:21 pm ] |
| Post subject: | Re: 35 GDSD ? |
| Author: | Gigafowl [ Tue Nov 16, 2010 7:55 pm ] |
| Post subject: | Re: 35 GDSD ? |
| Author: | SmokeEater829 [ Tue Nov 16, 2010 8:01 pm ] |
| Post subject: | Re: 35 GDSD ? |
| Author: | swamphonkey [ Tue Nov 16, 2010 8:37 pm ] |
| Post subject: | Re: 35 GDSD ? |
1660gdsd and 35gdsd I can't break 30 either ready for some methanol and a hot shot! |
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| Author: | Gigafowl [ Tue Nov 16, 2010 8:58 pm ] |
| Post subject: | Re: 35 GDSD ? |
| Author: | shallow water master [ Tue Nov 16, 2010 9:22 pm ] |
| Post subject: | Re: 35 GDSD ? |
my 18x60 ran 28.5 stock when it was new.i now have 388 hours on it and have MarshMellow exhaust,BPS intake and Mikuni carb with a yost power tube and have ran 30.2 with it |
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| Author: | quackconsumer [ Wed Nov 17, 2010 2:20 am ] |
| Post subject: | Re: 35 GDSD ? |
Sum of yall really need to quit believin what people say they run. I could tell you I run 39 mph, but it don't mean it's true. I hear so many people talk bout runnin 30+ mph, but da reality of it is just cause they bumped dat speed one day while runnin down current wit a tail wind don't mean they run it steady. Hell I bumped 34 once but I run a steady 31.5 when empty. And truth of da mater is how often do you run your boat wit just you and a gas tank. Ussually I have at least one ice chest another person and bout 200 lbs of other shit in da boat. So for a stock 35 hp surfave drive avg runnin speeds are 24 - 28 mph dependin on the hull. Also keep in mind theese engines are cheaply built from da B&S factory and performance does vary from engine to engine. |
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| Author: | Noladucks1 [ Wed Nov 17, 2010 10:45 am ] |
| Post subject: | Re: 35 GDSD ? |
exactly, on any actual mud hull with some weight to it, in the 18x48 range, I'd expect steady unloaded speed of the stock 35/36s to be 25-28 mph. If anyone is getting more than that, their full must either be a lot lighter or they got a little something done to their motor. Unless they bumped 30 for 6 seconds when they shot through a weir that was blowing them out at an extra 2 mph. |
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| Author: | DuckHunterF250 [ Wed Nov 17, 2010 8:01 pm ] |
| Post subject: | Re: 35 GDSD ? |
if i jerk my gps really fast i can bump 45 |
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| Author: | robertb4wd [ Sat Nov 20, 2010 11:17 pm ] |
| Post subject: | Re: 35 GDSD ? |
I get 28-29 all day with the GPS sitting at my feet. I have held 30-31 a few times with the right conditions (I have witnesses). Now that's with 6 gallons of fuel and the things I keep in my storage box. As far as the comment about the prop. I ran faster with less rpm's with a new prop. I started gaining rpm's and losing speed as my prop started to lose surface area. The guys at go-devil will tell you the same thing. I don't know about other brands, but the GDSD's are sensitive on prop wear. I do agree with the comment about the compression. I had another motor that would turn the rpm's but didn't have any power. |
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