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| 40 Hp. Yamaha 2 Stoke http://mudmotortalk.com/mmt_v2/viewtopic.php?f=3&t=27767 |
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| Author: | mississippiduckboy [ Sun Mar 18, 2012 11:02 pm ] |
| Post subject: | 40 Hp. Yamaha 2 Stoke |
Went to run the flat this weekend and im having a problem. Run wide open from launch for over 6 miles before I came off the gas to slow down for a guy fishing. When I went to get back up and run, the motor comes out the hole great, but soon starts to loose power and slow, ends up almost to a crawl while your still supposed to be running wide open. Any ideas guys? |
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| Author: | T-Bubba [ Sun Mar 18, 2012 11:09 pm ] |
| Post subject: | Re: 40 Hp. Yamaha 2 Stoke |
trash in the carbs maybe also check your compression i had a suzuki 75 do as you say oneday when it cracked a piston and lost all compression |
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| Author: | mississippiduckboy [ Sun Mar 18, 2012 11:10 pm ] |
| Post subject: | Re: 40 Hp. Yamaha 2 Stoke |
I hope its not the carbs....just spent close to 1000$ on new set |
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| Author: | T-Bubba [ Sun Mar 18, 2012 11:16 pm ] |
| Post subject: | Re: 40 Hp. Yamaha 2 Stoke |
trash in a jet could do it though does it idle good? or is it hard to start, idle |
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| Author: | SHANE704 [ Mon Mar 19, 2012 1:47 pm ] |
| Post subject: | Re: 40 Hp. Yamaha 2 Stoke |
ethanol fuel will destroy the inside of the fuel line and cause lil bits of rubber and plastic to get into the carbs...a new fuel line, clean carbs, and install inline fuel filter |
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| Author: | mississippiduckboy [ Mon Mar 19, 2012 6:35 pm ] |
| Post subject: | Re: 40 Hp. Yamaha 2 Stoke |
Have inline filter brand new, got new fuel line last week, but it has always idled ruff even before the new carbs. |
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| Author: | BadBowtie [ Fri Mar 23, 2012 3:36 pm ] |
| Post subject: | Re: 40 Hp. Yamaha 2 Stoke |
Are the jets adjusted correctly? I have a 99 40 yam and if they are not spot on with the service manual and all seals are good, you will have issues, i did. Also check air/fuel mixture |
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