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Well a few years ago a friend dumped these 2 old snowmobile engines off on me for free. One was running but disassembled, the other, for parts, seized by years of internal rust. So I'm finally finding time to start working on these motors. I don't know what sled the good motor came out of. Here is what the label reads:

Rotax-WERK AG. WELS
Mot. No. 1944510
bore 2x64,5 mm, stroke 61 mm, capac. 399 c.c.
MADE IN AUSTRIA

It has a single Tillotson HR Carb

I've been told its an olympic or a nordic engine, but i would like to know what year and which one of the two...

How can I find out what sled it came from? Knowing what it came from could help me in ordering some parts. :confused:

Also, It's been a few long years since high school shop class. Where could I find a good article on rebuilding a snowmobile engine? I know I'm going to need new rings, but hell if I can remember tolerances between pistons, rings, and cylinder walls.

Thanks you very much for any input. If you want I could post some pictures of what I am up against. Heheh. :rolleyes:
 

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Well a few years ago a friend dumped these 2 old snowmobile engines off on me for free. One was running but disassembled, the other, for parts, seized by years of internal rust. So I'm finally finding time to start working on these motors. I don't know what sled the good motor came out of. Here is what the label reads:

Rotax-WERK AG. WELS
Mot. No. 1944510
bore 2x64,5 mm, stroke 61 mm, capac. 399 c.c.
MADE IN AUSTRIA

It has a single Tillotson HR Carb

I've been told its an olympic or a nordic engine, but i would like to know what year and which one of the two...

How can I find out what sled it came from? Knowing what it came from could help me in ordering some parts. :confused:

Also, It's been a few long years since high school shop class. Where could I find a good article on rebuilding a snowmobile engine? I know I'm going to need new rings, but hell if I can remember tolerances between pistons, rings, and cylinder walls.

Thanks you very much for any input. If you want I could post some pictures of what I am up against. Heheh. :rolleyes:[/b]

I have a Skidoo Olympique built in oct 1971 SN on motor is 206 1102, hope this helps..

EJ
 

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I have a Skidoo Olympique built in oct 1971 SN on motor is 206 1102, hope this helps..

EJ
if yours is a 1971 MOT with 206....the one I have on my deck is much older....it is not seized up thank god...
MOT 117 4301 which would make mine more of a dinosaur engine...need a fair amount of parts to be useable...all of the things that are very important to make it run are missing...I should know what I have in a few days....and place a mega order A-Z nearly...I have a working motor...pull start, ignition lead, case with all internal parts in working order....all of the important things on the outside are unknown where because I found motor thrown out for trash/scrap metal
 
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