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 35hp MB running rough back firing 
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MMT Pro Member

Joined: Wed Mar 25, 2009 7:28 am
Posts: 132
Post 35hp MB running rough back firing
My MB35 is running like shit and I cant keep it running. Changed all the fuel lines got it running but it surges up and down and back fires once in a while. Been sitting for amonth ran fine last time. I run the gas out of it every time. Seems like when I took the filter off it runs better but when I put it all back on it floods out. Any suggestions?


Sat Jul 28, 2012 10:50 am
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MMT Pro Member

Joined: Thu Dec 30, 2010 5:48 am
Posts: 274
Location: Palmer, Alaska
Post Re: 35hp MB running rough back firing
When was the last time the carb got a cleaning? That's probably where I would start if a new fuel filter doesnt solve the problem.


Sat Jul 28, 2012 11:35 am
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MMT Pro Member

Joined: Wed Mar 25, 2009 7:28 am
Posts: 132
Post Re: 35hp MB running rough back firing
idle jet was clogged...I just cleaned it not that long ago. Damn ethanol ruins everything. Im going to start running non-ethanol gas.


Sat Jul 28, 2012 1:29 pm
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MMT 1000 Club

Joined: Thu Dec 29, 2011 10:46 pm
Posts: 2342
Location: Mandeville, LA
Post Re: 35hp MB running rough back firing
Yep, it sucks. Non-ethanol premium is better, but you still need the put Stabil in it to keep it from breaking down so damn fast.


Sat Jul 28, 2012 8:30 pm
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