1978 90hp merc jetting question

[ryans01z28]

I would like to put bigger jets in my m900 carbs to make it a 115hp motor but not sure on which jet to get. Can anyone help me out. Is it a .074 jet I need?

 

[faztbullet]

You cannot add jets and make it a 115 as block,pistons, and reed stop height are different

 

[ryans01z28]

A boat mechanic said all you need to do is add bigger jets to bump up some power to make it around 115hp

 

[fastjeff]

He probably voted for Obama!

Jeff

 

[faztbullet]

A boat mechanic said all you need to do is add bigger jets to bump up some power to make it around 115hp

He needs to restudy his inline motor information.. Do not do this as all your going to do is make motor run chitty and us more fuel and not see anything performance wise.