No load engine RPM?

A few months ago when I replaced the governor gear on my LTX1050, I adjusted the governor arm and attempted to set the rpm but cannot find the proper max governed rpm. The engine's technical manual lists the idle rpm and minimum governed rpm but no maximum governed rpm. I tried calling the Cub Cadet dealer and the answer I got was 3600 RPM (no load max RPM). My understanding is that mower manufacturers set the RPM lower to help increase engine life and reliability. Also, the hydro gear transmission in the unit has a max input speed of 3,000 RPM. Without a photo-tach I cannot tell what effect increasing the engine RPM will have on the drive train (trans pulley).

Has anyone else adjusted their governor's max RPM? If so, what did you set it at?

Engine is a 24HP Briggs ELS 44M777

Thanks.

Mike

How about also supplying the type number from the engine. Then I can input it into the Briggs dealer site and tell you what the factory setting is. I am sure that even if the engine is set at 3600 because of the size of the engine pulley compared to the size of the tranny pulley you are will below 3000 input speed.

I just did this for the new engine I put on my country clipper. IL was able to confirm that 3600 was the correct speed and I ended up setting it to a little over 3500, maybe if I would have had the fancy tang bending tool I could have been more accurate and gotten it closer to 3600. I kept going over...

ILENGINE said:

How about also supplying the type number from the engine. Then I can input it into the Briggs dealer site and tell you what the factory setting is. I am sure that even if the engine is set at 3600 because of the size of the engine pulley compared to the size of the tranny pulley you are will below 3000 input speed.

Click to expand...

Sorry, the engine is 44M777 type 0720 B12

Mike

txzrider2 said:

I just did this for the new engine I put on my country clipper. IL was able to confirm that 3600 was the correct speed and I ended up setting it to a little over 3500, maybe if I would have had the fancy tang bending tool I could have been more accurate and gotten it closer to 3600. I kept going over...

Click to expand...

I just used a large flat head screwdriver to bent it up or down. There is an angle that I could get that which would allow me to bend it just so slightly. I want to say that I set it at 3200 maybe just after the governor gear replacement, but I know that it is probably too low to obtain optimal cut quality.

cruzenmike said:

Sorry, the engine is 44M777 type 0720 B12

Mike

Click to expand...

The 44M777-0720-B1 is factory set at 3300

ILENGINE said:

The 44M777-0720-B1 is factory set at 3300

Click to expand...

Thank you so much. I will go ahead and take it up 100 RPM and see what happens.

#cruzenmike, have you looked into specifics of your fuel? The optimum chemical makeup of a good fuel for your mower should have the proper hydrocarbons to carbon ratio. It should be between 4 to 12 carbon atoms per molecule. Every percentage outside of this molecular tolerance may affect your idle rpm and in turn your cutting performance! Where did you get your fuel? I personally like to buy 50 gallons of 88 octane fuel from BP. It has to be BP! Their blend of additives to their molecular makeup is ideal for high performance cutting machines. I then take my 50 gallons of BP mid-grade to the University of Michigan Chemistry Laboratory to have them analyze the molecular structures within the fuel. They then give me a report of what to add to the fuel to make it a perfect mixture for max clipping performance and efficiency of combustion. All in all it only cost me about $1,000 to have this entire process done. It is well worth the time and money seeing as 50 gallons will last an expert lawn specialist such as myself nearly an entire summer! For a beginner like you, it may be wise to have a professional get your rpm range in the ballpark and then use the fuel treatment method. You'll be slinging blades in no time!

-BKC