Can Yamaha high thrust lower unit be converted?

rainslee

Recruit
Joined
May 28, 2003
Messages
3
Wondering if a 9.9 Yamaha 4 stroke high thrust lower unit be changed out for a regular lower unit? <br /><br />Thanks
 

Forktail

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Joined
Feb 11, 2002
Messages
977
Re: Can Yamaha high thrust lower unit be converted?

Welcome rainslee! :D <br /><br />Yes they could. But even though they are the same engine, the high-thrust 9.9 engine is tuned to operate at 4000-5000 rpm, where the standard model is tuned for 4500-5500.
 

rainslee

Recruit
Joined
May 28, 2003
Messages
3
Re: Can Yamaha high thrust lower unit be converted?

Thanks forktail, can my local dealer re-tune the engine for the new lower unit?
 
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