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  Mystery: Engine surge after 3000rpm's?

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Author Topic:   Mystery: Engine surge after 3000rpm's?
Jay A posted 09-08-2002 03:02 PM ET (US)   Profile for Jay A  
Last week during heavy seas my 2000 200hp Suzuki would "surge" then loose power. Below that level smaller "surges" would develop.The "over rev limiter" light DID NOT come on!I was able to maintain about 10-12 knots and make it in. At the dock It would idle with no problem.Spark plugs look clean and dry. No water evident in the filter but I noticed that the primer bulb wasn't firm. The engine is still under warrenty but the mechanic never showed. In the meantime yesterday I put a couple of pints of stable gas treatment in the tank. Went out for a spin today and no problems!And the primer bulb was rock hard. Could it be I had air in the fuel system? A "vapor lock"? Any ideas? And should I investigate further? Thanks!
bocadrew posted 09-08-2002 03:25 PM ET (US)     Profile for bocadrew  Send Email to bocadrew     
Did you rule out your propeller lifting out of the water during heavy seas?
Jay A posted 09-08-2002 06:43 PM ET (US)     Profile for Jay A    
bocadrew:Thanks: Yes I did,The problem continued when I reached the protected waters of the outer harbor. At first I thought I snagged a lobster pot. It had that same "pull back" sensation but that wasn't the case.
smirkless posted 09-09-2002 12:34 PM ET (US)     Profile for smirkless  Send Email to smirkless     
If you had an engine surge at the same time the boat seemed to pull back, Its possible you have a "spun prop". If your engine detects an over-rev situation, it may automatically reduce the RPM.
Just a thought.
Smirkless in Orlando
Jay A posted 09-09-2002 07:49 PM ET (US)     Profile for Jay A    
smirkless: I thought the same thing. My prop is stainless steel and checked it out and all seems ok. As a matter of fact it still looks as new as the day I bought it and that goes for the rest of the lower unit.I talked to the mechanic at the dealership and he said as soon as there is an over rev condition the "over rev" warning light would come on...this did not happen. I think it was a case of sudden loss of power due to fuel starvation possibly caused by air in the fuel system. Thanks for the reply!

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