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    '03 F115 Idle fluctuation -FIXED

    During my de-winterization and on my first run of this season, I noted the engine idle would cycle down to 7K then up to 9K and then go back to 8k. It occurred every 30-45 seconds at idle. Normal idle is 8k on digital Yamaha tach. The idle fluctuation occurred on both the muffs and on the water...
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    F90 or F115 Tach & Harness Part # Q's.

    I am trying to help a friend. He is trying to sort out what parts to buy for a spring re-power. What harness (part #) will he need if he buys a 2008 F90 or F115. While he is planning on using the multifunction gauges, can he upgrade to command link in the future using the same harness? I see...
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    F115 Bogging down

    I have a serious issue with my 2003 Yamaha F115. The engine is an inline 4 cylinder with fuel injection. 106 hours. Last fall I noticed it ran a bit "rough" at ~1900 rpm. It would disappear slightly below or above that RPM. No other issues last year. Prior to running it this year I changed the...
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    Need 2nd opinion - '87 Yamaha 90 overheat diagnosis

    Need a second opinion. My 1987 Yamaha 90's overheat alarm went off. I checked the obvious and found nothing serious. The impeller was fine, the thermostat was old but seemed OK. On reaching my technical limit I took it to a mechanic. His diagnosis: "there was a corrosion pinhole in the head...
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    '86 Yamaha 90 - Tstat replacement DIY?

    After lurking, here is my first post.<br /><br />I have done a search here and don't seem to see the answer.<br /><br />I have a '86 Yamaha 90 2s that has been great. Replaced water pump several weeks ago. Tell tale is strong. <br /><br />Now when the boat runs 3k or higher, get an overheat...
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