15HP Johnson Prop

[Defiant]

Hey All just a quick question I just picked up a 1995 15HP Johnson and the prop is a little nicked up but not bad was looking for props and all the charts say that it need;s a 9 1/2 x 10 but the prop thats on it is a 9 1/2 x 12 1/2 and its a stock prop.So whats the deal is that a special prop or what

Thanks

 

[Silvertip]

Re: 15HP Johnson Prop

There are always more than one prop for a given engine because the manufacturer has no idea what type of boat, barge, pontoon, the engine will be installed on and one prop will not service all of them. So the prop you have probably worked well on whatever boat the engine came off of. It may not work worth a darn on your boat. Only a tachometer will tell the story.

 

[Defiant]

Re: 15HP Johnson Prop

Thanks Silvertip but the engine was bought new in 95 not on a boat the guy I bought it from used it on a john boat and said he never changed the prop.


Also found this http://www.a1discountprop.com/omcoutboard.htm says that prop was mainley for 93 motor's ?

 

[Boatist]

Re: 15HP Johnson Prop

The 9 1/2 by 10 by 3 (386118) was the standard prop for the motor. It was used for Aluminum boats in the 12 to 14 foot range with light loads and speeds in the 18 to 20 mph. The 12 1/2 pitch would be for a smaller, lighter, faster, boat.

On my 14 Foot Klamath Aluminum I changed to a 9 3/8 by 9 by 3 (389892) Stainless Steel prop and it performed better.

 

[Defiant]

Re: 15HP Johnson Prop

thanks Boatist I am going to change it to a 9 1/2 x 10 and try it the 9 1/2 x12 1/2 seemed a little to steep a pitch to me but while I was looking nothing in any prop selectors said any thing about that size prop.