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Old 16 July 2013, 11:48   #1
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Tohatsu 9.8 two stroke adjustments

The engine is not smooth at low RPM although it's fine over about 1800.

There seem to be two adjustments available, the idle speed (the engine idles at about 1200rpm when hot is this too high?
In gear it drops to 8-900

The other adjustment I guess is a mixture setting screw. How is this adjusted? The engine has only done about thirty hours since new.

I was wondering if the idle/low speed mixture might need re-adjusting, and if so what is the procedure.

The engine never stalls, although it is unstable at low RPM.
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Old 16 July 2013, 17:44   #2
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Can nobody help me with this? I thought this forum was full of "legendary Tohatsu 9.8" followers.....
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Old 16 July 2013, 18:02   #3
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Can nobody help me with this? I thought this forum was full of "legendary Tohatsu 9.8" followers.....
Leave the engine alone - it's fine.
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Old 17 July 2013, 07:44   #4
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OK!

If that sounds normal for this engine then l will leave well alone.
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Old 17 July 2013, 14:27   #5
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Leave the engine alone - it's fine.
I have two a long shaft and a short shaft sounds normal to me
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Old 17 July 2013, 18:37   #6
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I guess that is why the power head is rubber mounted then!
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Old 17 July 2013, 18:42   #7
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Yep, they're a pretty basic old box of nuts and bolts, not your average straight six smoothy, blooming great little engines though.
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