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 35HP Pro Drive with Mikuni Carb issue 
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Joined: Sun Apr 13, 2014 10:59 am
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Post 35HP Pro Drive with Mikuni Carb issue
I have a 2012 35 HP Pro Drice auto reverse that has a Mikuni carb and exhaust kit the previous owner installed. Last winter I did a carb rebuild to help with starting and stalling issues. Now it starts great and will run good until you get to the last bit of throttle. Throttle response seems fine but at full throttle the engine keeps cutting out/ revving. Could the Main jet be under or oversized due to the exhaust?

Does anyone know the jet size I should most likely be using? I read standard was a #160 but with exhaust mods may need #165 but that was on a Motorcycle.


Mon Aug 24, 2020 5:28 pm
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Location: Gladewater TX
Post Re: 35HP Pro Drive with Mikuni Carb issue
Sounds lean by description. Check plugs for color, try goin up to a bit on main jet size. I little crust inside a main jet does make them smaller.


Mon Aug 24, 2020 10:24 pm
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Post Re: 35HP Pro Drive with Mikuni Carb issue
Not on limiter is it?


Mon Aug 24, 2020 10:25 pm
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Post Re: 35HP Pro Drive with Mikuni Carb issue
How would i check for a limiter? It does almost sound like a limit it’s hitting.


Tue Aug 25, 2020 1:10 pm
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Post Re: 35HP Pro Drive with Mikuni Carb issue
Here are the spark plugs. Lot of Carbon build up.


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Tue Aug 25, 2020 3:38 pm
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Post Re: 35HP Pro Drive with Mikuni Carb issue
The plug on right looks like a large gap. I dont seen any lean signs. As far as limiter, what year is your engine? We need to know if its cdi or non cdi. Is there a specific rpm that it acts up at?


Mon Aug 31, 2020 10:13 am
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Post Re: 35HP Pro Drive with Mikuni Carb issue
Is your fuel pump supplying enough fuel? The engine could be starving.

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Tue Sep 01, 2020 11:31 am
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