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Old 06 June 2016, 14:21   #1
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Country: UK - England
Town: Horley
Make: Yamaha 3.1 STI
Length: 3m +
Engine: 9.8 Tohatsu 2 stroke
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Finally got out today

Weather to good for work so decided to whip down to Shoreham to finish off running in my Tohatsu, all very pleasant just practicing riding on top of the waves, bit of drama when I lost an oar so had to retrieve it, any how I have a Yamaha 310 sti with a Tohatsu 9.8 2s that on wot I get a lot of splash over the transom, the angle of the motor is set on the first hole setting to the transom and I have no shims fitted,
So I was wondering if any one else has a similar set up and how they over come it
Apart from that I am really happy with the motor and it seemed to jump onto the plan at around 3/4 throttle, or I think that what it was doing as my previous outboards were a lot smaller, so not much experience in planing, but the nose dropped and I felt like I was flying
Sorry no photos at the moment as my phones not sinked yet
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Old 06 June 2016, 14:36   #2
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Lots of splashing generally (and I mean generally) means that the motor is too deep. At speed, is the anti-ventilation plate well under water? It should run at or just above the surface.

jky
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Old 06 June 2016, 15:50   #3
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Try coming up a hole possibly two
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Old 06 June 2016, 17:43   #4
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Get a tinytach and go out on a nice calm day with a couple of shims and a gps. An hour spent doing speed runs and handling tests varying trim position and shim height should produce the best set-up. Probably a small shim and two, possibly three holes out.
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Old 07 June 2016, 01:04   #5
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Country: UK - England
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Thanks for the tips, next time out I'll try a few adjustments
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Old 07 June 2016, 06:35   #6
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Old 07 June 2016, 06:43   #7
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You covered a good distance... still running in the Tohatsu?
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Old 07 June 2016, 06:56   #8
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It's all done now 😄, taken a long time as I have a major garden rebuild going on, but that's nearly done so ready for some fun and of course it's all set now after a gear oil change for my 2 weeks in Bigbury nr salcome devon
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