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ive got an 01 yamaha vmax 200hp OX66 fuel injected engine on my bass boat and it make a repetative surging noise at top speed. any ideas?
 

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my 07 vmax 150 was doing that at 3500 rpm. i found an old bird nest blocking the air intake on one side. it has run great since i cleaned it out. maybe you should check your air intakes or air filter?
 

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79617A707B130 said:
ive got an 01 yamaha vmax 200hp OX66 fuel injected engine on my bass boat and it make a repetative surging noise at top speed. any ideas?

Slow down a little.. ;)


Could be fuel issues. Is it time to change the filter?
 
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