Prop# Question

[MRS]

I have had this prop on boat for 12 or 13 years it came with boat but it does not fit boat. The boat is a 69 120 merc. stearndrive do not have boat any more but still have prop the prop # is 48-78120-19 does anyone know what it fits? Thanks for any replys......

 

[propper_advice]

Re: Prop# Question

It is a Mercury part #, 19 pitch prop. Merc props are pretty standard, so it will fit a number of Merc engines.

 

[Bondo]

Re: Prop# Question

I have had this prop on boat for 12 or 13 years it came with boat but it does not fit boat.

Ayuh,... As in the Pitch is Wrong,..??
As in the propshaft Don't fit,..??
As in the body/barrel of the prop is too small,..??

 

[MRS]

Re: Prop# Question

Ayuh,... As in the Pitch is Wrong,..??
As in the propshaft Don't fit,..??

I could have lived with the pitch in a pinch but did not fit the shaft. I only kept it in the boat in case somebody else could have used it and I did have a replacement for mine on board.

 

[Bondo]

Re: Prop# Question

but did not fit the shaft.

As in How, didn't it fit...

I don't have acess to the Merc part #s to figure this out,...
I'm trying to help by the Way it don't fit,...
Ya gotta help out abit here....

 

[MRS]

Re: Prop# Question

Would not go on the prop shaft seamed a touch smaller than the shaft. It did come with the boat went through two p.o. I know both but the original owner that bought the boat brand new in 69 is know longer living. Thanks for the help.....

 

[Fun Times]

Re: Prop# Question

I have had this prop on boat for 12 or 13 years it came with boat but it does not fit boat. The boat is a 69 120 merc. stearndrive do not have boat any more but still have prop the prop # is 48-78120-19 does anyone know what it fits? Thanks for any replys......

Could you recheck the Number on the prop from what you posted?
The number you gave will not pull up in the merc system it keeps coming up Invalid Item any way I run the number, I just want to make sure I am trying the right number. Thank's

 

[MRS]

Re: Prop# Question

I did go out and recheck it is 48-78120-19 Thanks for the reply....

 

[Fun Times]

Re: Prop# Question

I did go out and recheck it is 48-78120-19 Thanks for the reply....

Found it, Here is the part number history of this prop starting with number 7 being the oldest one, The number has Superseded over the years.
Item Supersession Chain:
Row Class Part Number SS Level Disp Description
1 48 832830A45 00 ACT BLKMX 14 1/2R19

2 48 832830ARA 01 SS BLMX 14 1/4R19

3 48 78120A45 01 SS ALUM 14.0X19.00

4 48 78120A40 02 SS ALUM 14.00X19.00

5 48 78120A4 03 SS PROPELLER

6 48 74874A4 04 SS PROPELLER

7 48 73508A4 05 SS PROPELLER ASSY

Here is the price and the Availability of the prop if you wanted to buy a one new today from a mercruiser dealer, And if the dealer was out of stock and had to order it from the warehouse this is where it would be coming from.
78120A45 is Superseded to 832830A45
Class:#48
Supersession
Item Number: 832830A45
Status: Active
Weight: 9 lbs
Description: BLKMX 14 1/2R19
Package Quantity: 1
MSRP: $179.49
003 - FOND DU LAC,WI, Has Over 10 in stock.
073 - ATLANTA,GA, Has Over 10 in stock.
075 - FRESNO,CA, Has Over 10 in stock.


To be honest with you I can not remember myself if the newer black max props would fit a older style prop shaft like you have or not, I don't think I have ever tried it myself, I know they have done different spline counts, And tapered ends I believe, ect, Over the years to the prop shaft, But I do not know about your's, Sorry about that maybe somebody eles will see this and help out. Good luck with it.:redface:

 

[Bondo]

Re: Prop# Question

Would not go on the prop shaft seamed a touch smaller than the shaft.

Ayuh,... If Boat Tech's research is Right,... Then You're Wrong....

The Propshafts of Mercruisers are the Same from the early 60s to present...
Matter of fact, the props will interchange with All of the standard single propped Outdrives,+ the Large gearcase Outboards...
Even the 4" mid-sized gearcases use the Same sized propshaft...
Just the outer barrel of the prop body is a different size..

 

[MRS]

Re: Prop# Question

Ayuh,... If Boat Tech's research is Right,... Then You're Wrong....

I could be but it will not go on the shaft something is not right with it and it looks like it is brand new. I will check it of this weekend maybe the splines are galled up on the inside and need a little filing. If a prop will not go on smooth and easy I never force them Thanks for the replys.... P.S. all other props I have had for it always slip right on.

 

[MRS]

Re: Prop# Question

boat teck, Thanks for all the info. you did on this if I do figure out what is up with this I will let you guys know we got a new oldboat and gave the kids the old merc 120 plus two extra props that do fit. Thanks again...