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New Mower Engine Needed- So Many Variations!

 
pollinator
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I pushed my zero turn mower too hard. I learned what "too hard" is when the engine literally blew up, two big holes and all oil draining out. I have suspicions as to why this happened, but my focus now is replacing it!

No, I don't want to buy a new mower entirely. I have made too many upgrades and customizations, plus an engine swap would be far cheaper. It is a Hustler Fastrak 930107. The current dead motor is a Kawasaki FS651V-BS11. Guess what? you can't buy a new FS651V engine with the "BS11" specs. But there's dozens of variations of the FS651V motor, and as long as the crank shaft is the correct size/length then any other variations should be easy enough to overcome, right?

I did a side-by-side comparison of the BS11 and the AS07 variant part diagrams and can see little to no difference (looking especially hard at where the various connections are made from mower to engine.)  But with $1700 on the line, I figured I should check with the Permie hive mind to see if I'm overlooking anything. Motor heads, what do you think?
 
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Depending on the terrain and weather patterns in your area, I think a g model goat would be best, left to wander around
a G model does superbly on wide open spaces and also supplies a range of fertilisers automatically.
You cannot push them too hard, they will resist and as for Zero turn, the mobility of the G model is amazing.
Dont get an A model, they go for apples as well!
Consider one.
 
master pollinator
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Depending on the terrain and weather patterns in your area, I think a g model goat would be best, left to wander around
a G model does superbly on wide open spaces and also supplies a range of fertilisers automatically.



HAHA :), sorry Matt, I don't have any engine experience to offer... I just couldn't help responding to John's post. Personally I might lean towards the g model goose which are easier to keep where you want them than the g model goat.
 
Matt Todd
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Many phone calls and parts diagram studies later I answered this- They make a basic engine and all the additional “spec numbers” behind it represent various options. The majority of them just indicate what mower company they built it for and are completely interchangeable.

BUT sometimes they mean a major difference like the size of the crank shaft, which could mean the difference between compatible or not at all. Don’t call the manufacturer (Kawasaki in this case.) They are impossible and know nothing. They direct you to call the small engine dealers who have greater technical knowledge, which I did. Three of them to make sure I was ordering the correct engine!

This is essentially my tractor, used for much more than mowing. Goats and geese need not apply to replace it.  
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