I Have A '99 225 Ox66 That Has Started Surging As If A Fuel Or Electrical Problem. After Replacing And Servicing All Filters,/connections/hoses The Problem Remains. I Have Done The Portable Tank And Squeezing Of The Bulb With No Changes In Performance. Compression Is Good On All. Also Cleaned O2, And, While It Make A Difference On Smoothness At Idle, Did Nothing For Performance. What I Have Noticed Is The Engine Will Start, Idle And Run To Red-line Until It Basically Reaches Operating Temp And Then Starts To Drop Rpm's As If A Fuel Issue Surging Back And Forth As If Intermittent Fuel Starvation Or Spark Loss. However The Engine Never Stalls Out Completely. I Pull Throttle Back Rpm's Smooth Out Until I Try To Accelerate Then Surging Continues. It Does Appear I Have A Faulty Remote Tank Sensor And My Main Oil Tank Won't Refill Unless I Engage Manual Switch. Could This Sensor Be Sending False Info To Cdi Creating An Intermittent Shut Down ? Could There Be Any Other Electrical Part (rotor, Stator, Etc) That Could Fail As Temp Under Cowling Increases? Any Help Appreciated.
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'99 225 Ox66 Surging At Speed
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Went thru the same exact scenario with my Carb. VMax 150. Argued with the tech about the problem he said was spark plugs. I said it couldn't be plugs, I had replaced them about 6 months ago. It was spark plugs. Runs like a champ now. Now I listen to the mechanic better than I did before......
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