620 720 engine swap

I'm running a 24hp Honda on my little IH Cub Cadet loader tractor... I show it no mercy, and it hasn't overheated EVER...

We had Onan Performers on our Lincoln Ranger 8's, and our Miller Bobcats (welder generators) and the Lincolns would overheat, the Millers would not... but it was more because A) the units were INSIDE our 9ft enclosed service bodies, so airflow was limited 2) Some of the guys didn't have their exhaust sealed up too well, so it'd flood the interior of the compartment with exhaust and 3) the Ranger 8's had aluminum windings, but the Millers were copper... the aluminums were higher resistance, so they'd generate more waste heat than the Bobcats...

So this really isn't a good indicator...

I bought a small skid-steer (made by Hydra-Mac) that had the Onan NHCV (reverse cooling), and it overheated and burned up the machine (which is why I got it for $300), but that apparently was a common theme for NHCV-powered skidders, probably machine just as much at fault, as a skid-steer is a steel bucket into which dirt, leaves, twigs, gravel, stray tools, and all sorts of other debris accumulates, which rodents LOVE to make nests out of... inside the cooling shroud...

So that really isn't a great indicator either...

I have an Onan (prior to the 'Performer' moniker) on my mobile platform (it started out life as a detassling machine). It NEVER overheats, but that's because it doesn't run well enough to work hard enough to get hot...

So that's not a fair indicator either...

I had an Onan MCCK 5 generating plant that ran at 1800rpm, like a watch, started perfectly, every day, without a choke, and never missed a beat, but every so often would make a really loud WHACK, like there was something in the shroud, that got picked up by the flywheel, and I had it apart a half-dozen times and simply could NOT find any reason for it...

So that's not a fair indicator either.

I CAN tell you, that if you call Cummins-Onan for ANY parts, or ANY support, or ANY advice... or even the time-of-day, they are unlikely to have it, wouldn't give you an estimated time of availability, or even quote you a price... but if you order it, you'll wait for it, AND... have either a stroke, aneurism, or myocardial infarction when they hand you the bill...

So if you're building a working machine... consider every possible option, and even a few impossible options...

Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.

I have a 720 that the guy I bought it from had just installed a new B&S in it. It has a loader on it, I've had it for a few years and it's still working fine.

917 H, '48 G, '65 D-10 series III "Allis Express"

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Larry Miller Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 21 Nov 2009 Location: NWIL Points: 899	Post Options Post Reply Quote Larry Miller Report Post Thanks(0) Quote Reply Topic: 620 720 engine swap Posted: 23 Mar 2022 at 6:55pm
	What can you tell me about a Onan Performer 24hp engine compared to Honda and B&S. I see better comments about the B&S and Honda's may overheat. Looks like the Performer has the exhaust out the front but very little cutting of hood.
	I used to be young and stupid, now I am not young anymore.

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DaveKamp Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Apr 2010 Location: LeClaire, Ia Points: 5754	Post Options Post Reply Quote DaveKamp Report Post Thanks(0) Quote Reply Posted: 24 Mar 2022 at 9:53pm
	I'm running a 24hp Honda on my little IH Cub Cadet loader tractor... I show it no mercy, and it hasn't overheated EVER... We had Onan Performers on our Lincoln Ranger 8's, and our Miller Bobcats (welder generators) and the Lincolns would overheat, the Millers would not... but it was more because A) the units were INSIDE our 9ft enclosed service bodies, so airflow was limited 2) Some of the guys didn't have their exhaust sealed up too well, so it'd flood the interior of the compartment with exhaust and 3) the Ranger 8's had aluminum windings, but the Millers were copper... the aluminums were higher resistance, so they'd generate more waste heat than the Bobcats... So this really isn't a good indicator... I bought a small skid-steer (made by Hydra-Mac) that had the Onan NHCV (reverse cooling), and it overheated and burned up the machine (which is why I got it for $300), but that apparently was a common theme for NHCV-powered skidders, probably machine just as much at fault, as a skid-steer is a steel bucket into which dirt, leaves, twigs, gravel, stray tools, and all sorts of other debris accumulates, which rodents LOVE to make nests out of... inside the cooling shroud... So that really isn't a great indicator either... I have an Onan (prior to the 'Performer' moniker) on my mobile platform (it started out life as a detassling machine). It NEVER overheats, but that's because it doesn't run well enough to work hard enough to get hot... So that's not a fair indicator either... I had an Onan MCCK 5 generating plant that ran at 1800rpm, like a watch, started perfectly, every day, without a choke, and never missed a beat, but every so often would make a really loud WHACK, like there was something in the shroud, that got picked up by the flywheel, and I had it apart a half-dozen times and simply could NOT find any reason for it... So that's not a fair indicator either. I CAN tell you, that if you call Cummins-Onan for ANY parts, or ANY support, or ANY advice... or even the time-of-day, they are unlikely to have it, wouldn't give you an estimated time of availability, or even quote you a price... but if you order it, you'll wait for it, AND... have either a stroke, aneurism, or myocardial infarction when they hand you the bill... So if you're building a working machine... consider every possible option, and even a few impossible options...
	Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.

Larry Miller Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 21 Nov 2009 Location: NWIL Points: 899	Post Options Post Reply Quote Larry Miller Report Post Thanks(0) Quote Reply Posted: 24 Mar 2022 at 11:23pm
	Dave & all - I am looking at a Simplicity that has a performer already installed. Just checking to see if it is a good/ok engine compared to others. I just don't want to make a mistake if it is a bad transplant.
	I used to be young and stupid, now I am not young anymore.

Dusty MI Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 13 Sep 2009 Location: Charlotte, Mi Points: 5058	Post Options Post Reply Quote Dusty MI Report Post Thanks(0) Quote Reply Posted: 25 Mar 2022 at 8:37am
	I have a 720 that the guy I bought it from had just installed a new B&S in it. It has a loader on it, I've had it for a few years and it's still working fine.
	917 H, '48 G, '65 D-10 series III "Allis Express"

Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41608	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 26 Mar 2022 at 10:46pm
	I installed a Honda and the only problem was it tended to suck up grass clippings as the screen covering the flywheel opening did not turn with flywheel and would load up with clippings , had to install a screen below opening to stop it sucking up debris from under tractor
	Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful."