Prop help.....What is it??

[mhines]

Lets see how good you are at propeller I.D...........The motor is a 1990 15hp Mercury tiller. The only numbers on the prop are this A12L105p.I'm looking to find the size and pitch, in case i need to replace, or change it.

I just bought this motor, and am trying to figure everything out!

Thanks

[boatfixer]

Either a mercury original with about 6 digits missing or an aftermarket I cant cross ref.

Based what I've seen its a 10 1/2 pitch.

If its an aftermarket, the other digets Im not sure.... "A" could mean aluminum, "12" could be splines or diamter (high thrust props have lager diamters)

Can you post a picture?

[dan z]

I read that as a 12" prop dia w/ a 10.5 pitch

[Valv]

I read that as a 12" prop dia w/ a 10.5 pitch

Same here, 12" diameter, 10.5 pitch.

[CAMAN]

A 12 inch prop on a 15hp motor? Seems pretty big to me.

[boatfixer]

High thrust props are large diameter

[morepower02]

The 1990 merc 15 does not have a BigFoot high thrust gearcase. It should be a 8 spline prop. A 12" diameter would most likely hit the cavitation plate. Your prop is a 9x10.5p

[mhines]

Here are a few pics..........I think it is a 9x10.5p but wasn't sure...........thanks for the help!!

[morepower02]

No problem