Mercury Props - differences between years?

[Hydro Mark]

I have 1968 Merc 1250 125 hp outboard and I'm looking for an extra prop for cruising. I know the diameter, pitch and splines I need and that it's through-the-hub exhaust. What other information do I need when searching for a used prop?

Thanks

 

[Hydro Mark]

Re: Mercury Props - differences between years?

Anybody?

 

[SkiDad]

Re: Mercury Props - differences between years?

i think any mercury prop from around the late 60's to early 80's would work. Just my thought, but not 100% sure. I think the main thing is the diameter. You pretty much have all you need.

 

[Hydro Mark]

Re: Mercury Props - differences between years?

I've references to hub diameter but its never listed on specs of the prop. I'm wondering if I buy a mercury 15 spline thru hub exhaust with the correct dia and pitch, are they all the same?

Thanks again

 

[SkiDad]

Re: Mercury Props - differences between years?

instead of looking from a private owner why not see if a local marine shop has a used one and pay the 60 bucks or so. I'm sure I could find one in my area as that prop is pretty common. I think the hub went bigger the later years.

 

[Bondo]

Re: Mercury Props - differences between years?

I've references to hub diameter but its never listed on specs of the prop. I'm wondering if I buy a mercury 15 spline thru hub exhaust with the correct dia and pitch, are they all the same?

Thanks again

Ayuh,... Yer motor uses the mid-sized hub,...

I/Os, 'n large gear case outboard props Won't fit yer's,...

Props for yer motor, top out at 'bout 13" diameter,...
Those at 14" or larger are for the large gear cases...

 

[jestor68]

Re: Mercury Props - differences between years?

Your 1968 Mercury has a 4.25" (intermediate) gear case; the same as a new 75-115 motor.

It uses the same props as a new motor of like HP, and handles props up to 14" in diameter; although you won't see that large of diameter unless you get down really low in pitch(like 13 pitch).

If you look a prop for your motor, then look up a prop for a new 115, you'll see the same part number.

As a side note; the smaller HP "Bigfoot" motors also use this same intermediate gear case.

 

[Hydro Mark]

Re: Mercury Props - differences between years?

Your 1968 Mercury has a 4.25" (intermediate) gear case; the same as a new 75-115 motor.

It uses the same props as a new motor of like HP, and handles props up to 14" in diameter; although you won't see that large of diameter unless you get down really low in pitch(like 13 pitch).

If you look a prop for your motor, then look up a prop for a new 115, you'll see the same part number.

As a side note; the smaller HP "Bigfoot" motors also use this same intermediate gear case.

Perfect...Exactly what I was looking for...Thank you!:usa2:

 

[Hydro Mark]

Re: Mercury Props - differences between years?

Your 1968 Mercury has a 4.25" (intermediate) gear case; the same as a new 75-115 motor.

It uses the same props as a new motor of like HP, and handles props up to 14" in diameter; although you won't see that large of diameter unless you get down really low in pitch(like 13 pitch).

If you look a prop for your motor, then look up a prop for a new 115, you'll see the same part number.

As a side note; the smaller HP "Bigfoot" motors also use this same intermediate gear case.

I was cross referencing the props like you suggested and found that the prop was the same but had a different hub. Is this just a minor hardware difference such as a washer or something?

Quicksilver Black Diamond + Flo-Torq Hub Aluminum Boat Propeller #QA2040X for Mercury 90 - 150 HP Outboard Thru 1977 Models 900-1150-1500 Models - iboats

Quicksilver Black Diamond + Flo-Torq Hub Aluminum Boat Propeller #QA2040X for Mercury 115 HP Outboard 2001 & Newer 4-Stroke - iboats

Thanks