Will a 91 670 engine bolt in to a 99 ski doo summit chassis?

Snow Guy

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MY current 670 engine blew up, but i found a 670 engine out of a 91 ski doo, it should bole in to my 99 ski doo right?
 

slededjr

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Will have to use the mount plate from the 99. Use all electronics from the 91.
 

tukernater

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Motor will sit pretty high being a Rotary valve if it's a S or ZX chassis.
 
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0neoldfart

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Did ski-doo make a 670 in 91? I believe it was a 617 at the time - might want to double check displacement / mounts, etc.
 
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