Chip tuning outboards

Jesper · 03 March 2002, 08:08

Does anybody know if it is posible to chip tune/rebuild a 150 hp
Mercury EFI to 200 hp ?

If it is posible what parts do I have to change ?

Jesper

niels · 03 March 2002, 12:56

No that is not possible.
it is an other engine.
from 135 to 150 is possible but very expensive.
200 to225 is also possible.
greetings niels from holland.

Garygee · 10 March 2002, 19:53

On this subject, how easy is it to mod the Mariner 50 HP 4 stroke to the 60 HP ?.
I know its the same cc, block leg etc.

Anyone know if its easy done and what needs changing to make it a 60 HP.

Thanks Gary

JCW · 10 March 2002, 20:36

Gary,
Check out Marinepower.com technical forum. Apparently it is just a matter of taking a plastic stop out which restricts movement on the carb butterflies.

Garygee · 12 March 2002, 21:20

Thanks

That even sounds like a job I could do.

Jono Garton · 12 March 2002, 21:26

Anyone got a trick like this for a Yam 50hp 4 stroke