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Old 22 March 2013, 23:56   #11
Locozodiac's Avatar
Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider Boats
Length: 4m +
Engine: Tohatsu 18 /30 HP
Join Date: Sep 2007
Posts: 1,706
Sorry to disappoint you but you can't upgrade an 18 further, it's already factory upgraded. To understand, 9.9, 15, 18 all 3 share same block, you can update a 9.9 into a 15 as both are 250 CC, the 9.9 is just carb restricted.

Although the 18 shares same block, has slight bigger pistons that it's younger brothers rising it's CC to 300 which is the max the block will go, anyway the HP is measured at the prop, if it were a 22 HP, would be shown with that number at the cowl.

Plainly in agreement it's a hell of an engine with oustanding punch and performance...

Happy Boating

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