[THEFERMANATOR]

Originally Posted by bradford

What Kind of Kohlers do you have Ferm? I have a 27 HP Command Horizontal shaft on the Z. And a 25 HP Vertical on the garden tractor.

Never had any problems, probably because all they see is 0% ethanol gas with Stabil.

The infamous KOHLER CV25 vertical shaft 25HP KOHLER COMMAND PRO is the WORST friggen engine for vapor locking I have ever run. It doesn't help it's the commercial low boy style where the muffler is RIGHT there in the V next to the carb. I ended up heat wrapping the muffler, heat shielding the fuel lines, and putting a heat shield around the carb. This worked OK, but if I was running it HARD(pushing it alot harder than I should. A 61" ZTR isn't meant to be doing bush hogging) it would still vapor lock. Switched to ethanol free fuel and no more problems.

These 25HP vertical shaft KOHLERS are sort of the scourge of the mowing world with all of the problems of head gaskets popping, crank keys shearing, mufflers blowing out, and vapor locking. The 26HP was teh same basic engine, but was fuel injected and didn't suffer hardly any of the shortcomings of the 25. And the horizontal shaft 25HP KOHLER didn't have much trouble either. The 22HP vertical shaft on the bagger is a good engine, but it suffers from lifter bleed down. Doesn't really affect how it runs, but is sure annoying.