PDA

View Full Version : Kohler Command 27, wide open no loar 3700 RPM...


WOODSHED
03-27-2009, 03:35 PM
Does this sound right? It is a CV740-0022 in a Simplicity Cobalt. I assume that once the blades are engaged it drops down to the 3600 sweet spot. Anybody know for sure? I called 5 dealers and got 5 different answers ranging from 2800-3850. Is 3700 gonna harm the engine? It was set at 3380-3390 previously. Thanks.

Scott

lawnpro724
03-27-2009, 05:08 PM
Are you asking about engine rpm full throttle?

jkilov
03-27-2009, 06:07 PM
Yes I think Kohlers have a 3750 rpm limit.

However, the max. allowed rpm derives from the equipment that engine powers.

AmsoilPower
03-27-2009, 09:14 PM
Does this sound right? It is a CV740-0022 in a Simplicity Cobalt. I assume that once the blades are engaged it drops down to the 3600 sweet spot. Anybody know for sure? I called 5 dealers and got 5 different answers ranging from 2800-3850. Is 3700 gonna harm the engine? It was set at 3380-3390 previously. Thanks.

Scott


2800? Are you serious that you were given this as an answer? You may consider staying away from that dealer for service work.

You are right on target at 3700.

puppypaws
03-27-2009, 09:24 PM
Does this sound right? It is a CV740-0022 in a Simplicity Cobalt. I assume that once the blades are engaged it drops down to the 3600 sweet spot. Anybody know for sure? I called 5 dealers and got 5 different answers ranging from 2800-3850. Is 3700 gonna harm the engine? It was set at 3380-3390 previously. Thanks.

Scott

Kohler's factory specs are 3750 no load on the CV 740. This is also per their engineers which I have spoken with personally on this subject.

QUOTE FROM THEIR MANUAL:

Engine Speed
NOTE: Do not tamper with the governor setting to
increase the maximum engine speed.
Overspeed is hazardous and will void the
engine warranty. The maximum allowable
high idle speed for these engines is 3750 RPM,
no load.

I MOW ALONE
03-28-2009, 01:46 AM
3700 is what i set mine at your dead on at 3700 no load.

Richard Martin
03-28-2009, 08:25 AM
As long as it's not using a lot of oil at 3700 then it's fine.

puppypaws
03-28-2009, 09:22 AM
As long as it's not using a lot of oil at 3700 then it's fine.

You and I know that, I actually spoke with a Kohler engineer about what we both had happen. They said, "we have no idea what would cause heavier oil consumption at our recommended rpm setting." There again, they told me 1 ounce per hour was within their tolerances of oil usage.

My 28 efi would maybe use 8 oz's in 50 hrs, the minute I jacked it up to 3750 it was using probably close to the 1 oz or more per hr. I could not believe what was taking place, I dropped it back to 3700 and it quit what I consider excessive usage, but still uses a little more than at 3600.

The extra 100 rpm's seems to make a great deal more difference in power of the mower than I would have believed. I would not normally think of 100 rpm's making as much difference as I actually felt in the mowers operation.

I would still love to know how 50 rpm's can make that much difference in oil usage. I've heard many people speak of running 3750 with no problems but you and I both saw a big difference in the 28 efi's.