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Big Dog to Cub Cadet Engine swap

#1

C

country0129

I have a Big Dog Alpha 52" with a bad deck. Said irrepairble. Found a Cub Cadet with a similar Kawasaki engine. Big Dog a zero turn, Cub Cadet a lawn tractor. Will I be able to swap engines from the Big Dod to the Cub Cadet, and what would be the obstacles involved?


#2

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txmowman

country0129 said:
I have a Big Dog Alpha 52" with a bad deck. Said irrepairble. Found a Cub Cadet with a similar Kawasaki engine. Big Dog a zero turn, Cub Cadet a lawn tractor. Will I be able to swap engines from the Big Dod to the Cub Cadet, and what would be the obstacles involved?
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If it is a similar engine, should not be an issue. The bolt pattern is the same. By similar, do you mean "same"? Like both have an FX691V, for example?


#3

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country0129

txmowman said:
If it is a similar engine, should not be an issue. The bolt pattern is the same. By similar, do you mean "same"? Like both have an FX691V, for example?
Click to expand...
This I do not know yet. The Cub Cadet is a good piece away, the owner is a little dim when it comes to mechanical things (after all, he let his engine blow up;) but I'll find out. This is the information from my mower's tags:
Chassis:
Mod:WDP350PAAB4
Ser: F42101946
Engine:
Mod: 932913
Ser: 14060627


#4

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txmowman

The engine numbers you listed are actually the Big Dog model and serial. The Kawasaki engine numbers are on a white label on the fan housing.


#5

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country0129

txmowman said:
The engine numbers you listed are actually the Big Dog model and serial. The Kawasaki engine numbers are on a white label on the fan housing.
Click to expand...
fr691vd23021


#6

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txmowman

That is a BS24R spec. If the Cub Cadet also has the FR691V, it would be the same.
As long as it is a FR or FS651, 691 or 730 and has a 1" diameter by 3-5/32" length crankshaft, you're good. FX would be fine as well, but the starter will be different.


#7

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bertsmobile1

FR's can come with 1.125" PTO's
Only know that because I got caught out the first time I ordered a replacement engine and of course the shaft size was wrong .


#8

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txmowman

bertsmobile1 said:
FR's can come with 1.125" PTO's
Only know that because I got caught out the first time I ordered a replacement engine and of course the shaft size was wrong .
Click to expand...
You are correct, they can come with the 1-1/8" as well.


#9

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country0129

The engine in the Cub Cadet is a FR730V.


#10

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txmowman

The FR730V on Cub Cadet should still be the 1" x 3-5/32" pto.


#11

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country0129

Swapping the engine from the Big Dog zero turn mower to the Cub Cadet lawn tractor, what would that entail?


#12

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Locomotive1969

Crank diameter and length are the only barriers. Swap the carb from the 730 to the 691.


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