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The 99 merc lower will fit but you will need the shift rod from the 94. That requires disassembling the lower unit. Does the linkage move behind the carb at all? Can you tilt the motor up in reverse?

Joe reeves method requires you subtract 4 degrees. Do not deviate from that. You do not care about idle timing at all. Idle speed will be set in the lake in gear and warm.

I believe Barnacle Bill's sponsored that website. Call them

I have bent shafts with aluminum props.

Put some Vaseline or liquid dish soap on the impeller

This post was 16 yrs ago.

Have you checked the linkage behind the carb? Just a plastic clip holds that together. Has the waterpump been changed and the rod pulled out?

How so? provide facts for that statement.

You really have no clue do you. Tell me how many lower units or engines have been destroyed by rock strikes on SS props.

You're the expert help hin with his motor then.

edit

Yeah there are a lot of high hp motors running with aluminum props out there.

I believe the 99 uses a little different shift rod it has a bend at the top. Usually those lower units are robust very seldom do the just stop shifting. Might be an easy fix

why do you think a 150 prop will fit that motor? Stop making this so hard on yourself. you don't need to buy a Mercury or any of the other brand name props. Solas props are relatively cheap and are pretty good props. You are not running a 100 MPH boat here. Call Michigan wheel or Solas to get...

That should be the water jacket. When its running that will fill with water

Explain to us how the fuel pump will cause low compression please?

Almost none of that statement has any basis in fact. Except the stainless is heavier than aluminum that is true. This just proves how little is known about props. #1 stainless is better performing pretty much across the board #2 dropping pitch does not necessarily mean losing speed because the...

l76v champion should work. https://www.marineengine.com/parts/ngk/mercury.html

That Yamaha prop is probably metric. The force shaft will be standard

The manual would have been cheaper. The proper tests would have saved you money. But you keep loading that parts Cannon.