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    2001 225xl EFI No Spark

    Cut out completely while under power. Compression checked out, No spark all six, followed repair manual troubleshooting, CPS check, 12V at purple wire on ECM. Does this sound like an ECM problem? Not sure the proper method to test ignition ECM. Appreciate any feedback
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    99 200 Ox66 runs rough

    Engine ran like a champ all day. On the way back to the dock through the now wake zone engine started running rough. If I put it into Neutral it would stall. Has new plugs, did a spark test and compression test, all checked out well. Next move is to replace the low pressure fuel pumps since...
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    reversed battery connection-help-sx200txrx

    Reversed battery connection, after correcting it, I tried to start my engine- nothing. Worked my way to find 80A fuse common to the the starter and charging circuit that was melted. Thought now that I had corrected the battery all is well and good. replaced link to test my theory - Wrong...
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    2003 Merc 90hp 4 stroke runs rough

    Engine runs rough at low and high speeds, very seldom it does smooths out momentarily, but most times it runs rough. Plugs are pristine. Checked fuel path from tank sending unit to on board fuel filter. Tested fuel pump with vacuum according to the manual and it had a slow leak. Dealer says...
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    Oxygen sensor

    My SX200TXRX has an oxygen sensor. My question is now with the E10 Fuel we must use in the NE, how is this affecting my fuel economy? Does Yamaha have an ECU map update to accomodate this if it does cause the engine to run more rich?
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    Yamaha manual choice

    I have a 1999 sx200txrx. Yamaha only lists manuals for a sx200 or s200txrx, it does have a sx150txrx though. I also tried to search by serial number, '6g6 x 001535' with no luck. I'd like to purchase a Yamaha manual but I'm afraid to purchase the wrong one. I'd rather have the factory...
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    Choice of Manuals

    What repair / shop manuals do you recommended for my 99 SX200TXRX? Yamaha Manual vs third party manuals. On line manuals vs the paper copy. I?ve rebuilt an auto engine and a snowmobile engine or two and would like to maintain / repair this engine as well.
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    yamaha 'fuel cup assembly' question

    My 99 Yamaha SX200TXRX surges. During throttle up, at about half throttle, it dies to about idol speed, then immediately regains power and speed, then dies again, etc. I noticed that the fuel level in the cup, which is attached to the engine, is just full enough to reach the filter portion of...
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    99 Yamaha 200hp looses power during throttle up / oscillates

    When I apply throttle I notice the engine is slightly weaker than normal. Once I get to about half throttle, the engine looses all power (like someone turned off the motor)... then immediately comes back up to speed, then again looses power. It will continue to oscillate like this. No...
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