Sorry for the odd question, but I am a Ford guy. I do work on a buddy's Scout and Travelall, but he isn't the most mechanically inclined, so I will ask here.

I am looking at an old Onan Gen Set (85KW) that uses an IH 572 (IIRC) as it's prime mover.

Honestly, I only need about 15KW... but at the price I can't really beat this deal.

So the question is: do any other IH motors have the same bell pattern as the 572? I would be happy swapping in a 345 as I am sure the propane consumption would be FAR less than the 572.

TIA!

The 572 is an LV... a 345 is an SV. I'm not up on the LV's at all and do not know if they use a "set" bell housing or if they use SAE adapters. Either way, it would take some custom adapter work to mate up a 345.

That is, unless I'm completely full of shit.......

Ask here http://www.binderplanet.com

If it's an "LV" it's likely a 549, not a 572. That may help your search.

I know that the one's that we have here in the vineyards that run irrigation pumps are UV549's. It's a big engine. I think ours top out at @2200 rpm. At one point there was a uv549 and a either 345 or 392 next to each other in one pump house both running pumps. They both are gone now, so I can't get any pics of the bellhousing on the smaller engine.

Chances are very slim you'll find an answer at binderplanet. try the guys over here http://oldihc.org/main/.
Very knowledgable bunch on the bigger stuff.

He doesn't need to go anywhere. If it is on the Gen set, chances are it has one of two things. The first is an SAE bellhousing, like those used in semi trucks. The second option is what they call a clutch adapter or clutch housing, these are specific to the industrial side of things, and just used to attach the motor to the pump or gen-set. They have nothing to do with an SAE bellhousing or transmission in general. Either way, neither of these has anything to do with an IH Scout or Travelall. Besides if it is a 549, then installing it would double the weight of the SV that's already in there. Nothing like a 1400 pound v-8! :rolleyes:

Unless I misread your post Carl, I think what he wants to know is if he can swap out the 572 or whatever is in there out for something smaller, like a 345 or so to save on fuel consumption. Which *might* work since he doesn't need the whole capacity the genset is capable of producing.

However, and gain [in fuel efficiency] with the smaller motor might be offset by the motor have to work harder turning the bigger genset (even at a lower output) compared to the same (small) engine running a more correctly sized genset. And all that might be comparable to running the bigger motor with the bigger genset but not having to work it so hard to get the lower output.


I don't know, just thinking. Either way, it would be cool to see/hear in person. Most all the gensets I get to be around are either Diesel or LPG/NG chevy motors (V6's or bigblocks)

Unless I misread your post Carl, I think what he wants to know is if he can swap out the 572 or whatever is in there out for something smaller, like a 345 or so to save on fuel consumption. Which *might* work since he doesn't need the whole capacity the genset is capable of producing.

However, and gain [in fuel efficiency] with the smaller motor might be offset by the motor have to work harder turning the bigger genset (even at a lower output) compared to the same (small) engine running a more correctly sized genset. And all that might be comparable to running the bigger motor with the bigger genset but not having to work it so hard to get the lower output.


I don't know, just thinking. Either way, it would be cool to see/hear in person. Most all the gensets I get to be around are either Diesel or LPG/NG chevy motors (V6's or bigblocks)

I see, I got it backwards. The SV engine maybe able to be swapped on, but he'd need to find the proper SAE BH or clutch adapter to do it. But, I think you concerns are well founded. Either you're not going to get full capacity out of the gen-set or, the fuel efficiency will be so bad it will not be worth it.

Unless I misread your post Carl, I think what he wants to know is if he can swap out the 572 or whatever is in there out for something smaller, like a 345 or so to save on fuel consumption. Which *might* work since he doesn't need the whole capacity the genset is capable of producing.

However, and gain [in fuel efficiency] with the smaller motor might be offset by the motor have to work harder turning the bigger genset (even at a lower output) compared to the same (small) engine running a more correctly sized genset. And all that might be comparable to running the bigger motor with the bigger genset but not having to work it so hard to get the lower output.


I don't know, just thinking. Either way, it would be cool to see/hear in person. Most all the gensets I get to be around are either Diesel or LPG/NG chevy motors (V6's or bigblocks)

ehh, Id think it would save fuel. A genset runs at a constant RPM. torque goes up as your amp load increases, so if he's only using a small amount of the gen's capacity, a smaller motor would swing it fine.
Now the question is if he's going to be running the thing enough to justify the cost and pita of the swap.

The "bigger motors use less fuel because they don't have to work as hard" argument makes me giggle a little bit. As long as you arn't having to enter power enrichment AFR's, the smallest motor to do the job will use the least fuel.
I would definitely recommend hooking up the egr valve either way if it has one, it would improve fuel consumption at part throttle conditions by making it a smaller motor, and with propane it won't dirty up the insides.

Yup. My Bad - 549 Cu In.

Thread: http://www.smokstak.com/forum/showthread.php?t=71006

Pic of the engine: http://i.ebayimg.com/14/!BlMg4(QBmk~$(KGrHqUOKkUEtKdqeq5LBL,sdu(IwQ~~_12.J PG

All I got.

Thanks!

Ummm, let's try that the right way!

http://i.ebayimg.com/14/!BlMg4(QBmk~$(KGrHqUOKkUEtKdqeq5LBL,sdu(IwQ~~_12.J PG

Thanks...

:emb2:

IMHO unless you've got something wrong with that motor, I doubt the labor and $$$ swap is ever going to justify the propane savings.
If something was wrong with that motor though... an sv might make sense if it works. can you get a picture of the bellhousing pattern at an angle? at least a few bolts.