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Recent content by bilj

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    2006 YAM 90hp 4 Stroke surging

    Engine surges while throttle is up. About every second the RPMS jump back and forth. Example - while Runnin 4k RPMs, engine dropped to 1.5k RPMs for 1 second then wen back to 4k. Lowerd RPMs to 3k, same thing. Worked fine through all ranges, all day. Idles fine.
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