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1979 Cub Engine Part #

Fri Feb 01, 2013 12:58 pm

I have an early 1979 Cub with a "stamped" part number of 529 413 R1 on the engine. The block looks like the original P/N was ground off and above # stamped on the block. I can find no references for this P/N. Does anyone have any info on this particular number?? Engine s/n is 325366X and casting date is 10-11-B FWIW.

Re: 1979 Cub Engine Part #

Fri Feb 01, 2013 2:15 pm

closest thing


i can find is a skeleton service engine # 528 317 R91

Re: 1979 Cub Engine Part #

Fri Feb 01, 2013 2:54 pm

Do a search for a board member named dyancey, he did a post on an engine with that part number back in 2005. there is also a 1976 cub in the cub data base that has the same stamped number.

Re: 1979 Cub Engine Part #

Fri Feb 01, 2013 3:47 pm

I have 251341R8 for a 70, 2 73s , 72 2 74s, 66 68 , 76, 77, 2 78s 2 75s and 5 homemade' s
251341R7 55
251341R4 51
251341R2 50
I have a few more that I will look at when it warms up some cold here and windy [29 and 25 MPH ]

Re: 1979 Cub Engine Part #

Fri Feb 01, 2013 9:58 pm

Bill E Bob wrote:I have an early 1979 Cub with a "stamped" part number of 529 413 R1 on the engine. The block looks like the original P/N was ground off and above # stamped on the block. I can find no references for this P/N. Does anyone have any info on this particular number?? Engine s/n is 325366X and casting date is 10-11-B FWIW.

Yours is the third engine that has shown up with this PN. The earliest was in late '73, the second was in Mid '76, and now yours in early '79. As to the meaning and why the different PN from what is normal (251341RX), I can't say.

I got your PM, and have all your information plugged into the database! Thanks!

Re: 1979 Cub Engine Part #

Sat Feb 02, 2013 5:55 am

'Nother Question: Anyone know what the "X" on the back end of the engine S/N denotes??

Re: 1979 Cub Engine Part #

Sat Feb 02, 2013 6:01 am

Bill, I don't know, but my '76 185 has an X after the serial #.

Re: 1979 Cub Engine Part #

Sat Feb 02, 2013 10:32 am

Say, Boss, just for my information, what is a skeleton service engine? Thanks, Stanley

Re: 1979 Cub Engine Part #

Sat Feb 02, 2013 10:38 am

It was a replacement block with pistons , rods bearings, crank , camshaft etc.

Re: 1979 Cub Engine Part #

Sat Feb 02, 2013 12:02 pm

Boss Hog wrote:It was a replacement block with pistons , rods bearings, crank , camshaft etc.


AKA a "short" block
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