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18hp Horizontal Vanguard Surging

#1

B

bernie255

Hello this is my first post, however this is not lawnmower related, i figured i would try my luck on here. I own a 2014 18hp dixie mud motor. I have had problems with lack of power to the engine, it would surge from half throttle to full throttle, i did some research and figured it was the governor. I moved the large governor spring in the slot to the right so it would open the gov up. After i did that i ran the boat and it was perfect, motor ran fine, it plained out etc.
(unaware it was raining)
The motor sat in the rain for about 5 minutes rite after i ran it. when the rain stopped it cranked up fine, but like before, the motor would surge from half to full throttle, but this time when i would shut it off the motor would make a quiet backfire out the exhaust.
My question is what could be causing this? Carb trash?
thanks for any help
pic of gov spring was before it was moved

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#2

pugaltitude

pugaltitude

It could be fuel related and yes dirt could cause it.

Is it fresh fuel?

Also 2014 model then it should have some sort of warranty.


#3

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bernie255

Yes fresh fuel, non ethanol. the gas tank/ fuel line was for a 2 stroke outboard but i flushed/cleaned it with gas


#4

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bernie255

bump...........


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