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Old 24 February 2016, 02:41   #1
Country: Netherlands
Boat name: Commando C4
Make: Bombard
Length: 4m +
Engine: Tohatsu 30HP M25C3
Join Date: Jan 2015
Posts: 100
Tohatsu M25C3 > 30hp

The Tohatsu M25C3 is identical to the 30hp version but restricted by the carb gasket and the timing. Upgrading to 30hp is partionally discussed here:

Tohatsu M25C3 Carb question Page: 1 - iboats Boating Forums | 609771

Has anyone attempted this ? I can manage changing the gasket but how hard is it to set the timing ? Any detailled instructions somewhere ?

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Old 24 February 2016, 04:11   #2
Roflhat's Avatar
Country: UK - Scotland
Town: Isle of Lewis
Make: Thundercat (TI)
Length: 4m +
Engine: Yamaha 70
Join Date: Jul 2010
Posts: 512
you should be able to find the manual online for both engines, which will contain the timing settings. Then it's just a case of lengthening of shortening the timing link which connects to the timing plate beneath the flywheel. Tohatsus have marks on the block every 5 degrees
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