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    engines sync

    Twin2007 Yamaha 115 hp counter rotating 4 strokes. In order for engines to sound "in sync" I must run the starboard 400 rpm faster than the port. WOT is 5300 for port and 5700 for starboard. Have "zeroed" out tachs per the manual. I'm stumped. Any ideas out there? Thanks, Ron
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    Yamaha hub discoloration

    2007 twin 115 Yammis with stainless props. Inside of starboard hub bright and shiney. Inside of port, rust colored coating. Both running fine. Any ideas? Thanks, Ron
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    Tachs not in sync?

    Twin 2007 115 hp Yamahas with Yamaha FMS. For engines to sound in sync the starboard tach must read 400 rpm higher than the port. Also at WOT the starboard tach reads 400 rpm higher. Both in acceptable WOT range. Any suggestions to correct? Thanks, Ron
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    Yamaha FMS trim indicator

    After spring commissioning port trim indicator (Yammi 115 4 stroke) read engine at full "up" position. Actually trim works fine. Read manual, followed directions to calibrate. Now indicator is always in full "down" . Suggestions before I call Yamaha? Thanks Ron
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    Trim indicator problem

    2007 4 stroke 115 hp Yamaha. Port trim indicator. After winter storage port trim indicator read to top of scale and flashing indication over trim. Followed procedure in manual to correct. Now always reads as if motor is way down. Mechanically trim working fine. Only indicator malfunctioning...
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    Water pump impeller change?

    2007 115 Yamaha 4 stroke, running in fresh water,about 100 hrs per year. What's the general concenses on how often should the impeller be replaced? Thanks. Ron
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