Prop size? 69' 80hp

[Newbe15132]

Hi,

well, I'm not sure what year or model this is. I still got to pick it up. here's one post that was made about the year.


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That s/n is peculiar, not matching any published values.

They started building the 4cyl 80hp motor in 1969 , but the serial number range expected is 2559001 through 2670574.

Australian built motors used s/n 8XXXXXX but that would put it into the late 70's. That motor is clearly older.

As a guess...I'd assume it is a 1969 80hp motor, or maybe a slightly older 85hp.
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So, what prop size or type should I order? I realy new at this.

Thanks

 

[Newbe15132]

Re: Prop size? 69' 80hp

Maybe a 13-1/4 X 17 PITCH would work?

 

[Scaaty]

Re: Prop size? 69' 80hp

Yep, 13x17 about right

 

[Newbe15132]

Re: Prop size? 69' 80hp

so I'll just get a 13x17 for mercury, and it should fit. I hope

 

[Newbe15132]

Re: Prop size? 69' 80hp

would it matter if I would get a porp with a pitch of 21 (13x21)? would it make the boat faster/slower?

Thanks

 

[wire2]

Re: Prop size? 69' 80hp

You probably won't be able to get it up on plane. It won't let the motor rpm get up to where you'll develop enough torque.

 

[Newbe15132]

Re: Prop size? 69' 80hp

So I guess I would want to go with 3 blade? or 4?

And what is Left Hand Rotation?

So many props!