
1855 Repower
#1
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Posted May 29, 2012 - 06:29 AM
Yes the deck has new bearings, the gearbox is full of oil and the PTO shaft through the front axle has been greased. Everything is turning free.
So I am giving very strong consideration to purchasing either a Honda 22-24HP or the Robin Subaru EH722 engine. I am looking for thoughts advice opinions on either of the 2 choices or someone elses thoughts on the most likely candidate that will be the closest and easiest swap over.
I have pulleys and cluthches that will allow me to run either a 1&1/8 shaft or a 1&7/16 shaft.
I do know one person in Canada did the Robin Subaru change over and he wsays its doing him well and both the Honda and Robin has similar torque values. So now its real life experience running these engines and doing the repower that I am looking for advice on.
Many thanks
#2
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Posted May 29, 2012 - 07:44 AM
#3
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Posted May 29, 2012 - 10:02 AM
#4
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Posted May 29, 2012 - 03:12 PM
Unless the Onan has high hours, I'd be checking the mower and the hydro very carefully. A fresh engine will not help if the problem is elsewhere.
#5
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Posted May 30, 2012 - 12:09 PM
#6
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Posted June 01, 2012 - 06:14 AM
Is the engine lacking power for the mower or the hydro? Thick grass will bog any engine running that large a mower and the hydro's demand for power should be minimal, unless working a hill.
Unless the Onan has high hours, I'd be checking the mower and the hydro very carefully. A fresh engine will not help if the problem is elsewhere.
without the mower engaged the engine pulls the hydro with zero problems and runs just fine it even reaches max engine speed.
The mower deck is completely rebuilt all 6 bearings have been replaced, the shafts are in good condition and I even drilled the hubs and inserted grease fittings and have them full of grease.
The hydro does not seem to have an issue or be draining the engine. When mowing if I am going up any grade the engine just slows down and gets to the point it will barely pull the mower. Its almost as though the mower is to large for the engine. I do not know the hours on the engine but I do know it smokes under a load and it does leak oil. So its my humble opinion the engine is nearing of its useful life and i would rather not blow it up, saving it from its total demise for someone else.
Small engine warehouse in Indiana has a complete kit with a 24HP Honda for 1900.00 ( an that seems like a lot) Or I can buy locally a Robin Subaru 25HP for 1350.00 and build my own new hub for the flywheel and spacers to raise the engine.
I am leaning towards the Robin for cost reasons.
Any last thoughts from my knowlegable friends?
#7
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Posted June 01, 2012 - 07:05 AM
#8
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Posted June 01, 2012 - 08:42 AM
#9
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Posted June 01, 2012 - 08:48 AM
Bring watching this one and when you stated that the engine slow with a load I strongly feel you have a governor issue. Make sure that the throttle shaft can go full open and that it does that also when a load is applied. It sure sounds like the carb throttle plate is not going full open.
#10
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Posted June 01, 2012 - 09:05 AM
Petenpole
Bring watching this one and when you stated that the engine slow with a load I strongly feel you have a governor issue. Make sure that the throttle shaft can go full open and that it does that also when a load is applied. It sure sounds like the carb throttle plate is not going full open.
Ducky thanks for the response, I adjusted the governor and the carb opens as smoothly as one could ever dream of. Prior to adjusting the linkage the engine wouldnt reach its full RPM's at a stand still. Now it revs up smoothly.
I think Daniel agrees with me the engine is getting weak and its time to find a donor or replacement.
#11
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Posted June 01, 2012 - 09:14 AM
This is what put me on the carb not opening completely.
Do you get a little governor over shoot when you push the throttle wide open? Also when you turn the mower on can you see the throttle go wide open and then come back?
#12
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Posted June 01, 2012 - 09:23 AM
I'll see if I can rig something to ensure the throttle is wide open next time I do this. Just got done cutting all the grass."But when I turned upslope, the motor didn't have the power to move the rig much faster than a slow amble without slowing way down."
This is what put me on the carb not opening completely.
Do you get a little governor over shoot when you push the throttle wide open? Also when you turn the mower on can you see the throttle go wide open and then come back?
#13
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Posted June 01, 2012 - 09:34 AM