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Old 05 June 2001, 16:53   #1
Country: Belgium
Town: Kapellen, Belgium
Join Date: Apr 2001
Posts: 2
Yamaha 9.9


I have a Yamaha 9.9 HP dating from 1990.
Someone told me that it was possible to modify it to a 15 HP. Does anybody knows about that ? What are the modifications to perform ?

Many Thanks,

Greetings from Belgium

S. Pecher

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Old 26 January 2005, 16:52   #2
Country: UK - Scotland
Town: wormit
Boat name: lots of them
Make: various
Length: no boat
Engine: all types
Join Date: Dec 2004
Posts: 432
I am asuming we are talking about a two stroke engine here. You will need a carb, reed block and cylinder head, you will also have to take the stopper off the advance to let the ignition advance further, cheers Davie
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