422 engine

[Beechwood]

I believe what Bob999 was getting at (please correct me if I'm mistaken) is that the wheel motors/pumps used on the 180 may have a more impact on "power" than the engine output. In other words, additional HP is likely not the only thing that makes the 422 and the 425 more "powerful".

I have the specs. on the 180 wheel motors from WHITE. I can't remember what the max in/lbs of torque is compared to the 422 wheel motor max in/lbs. of torque. If I look at the torque curve chart for the 18HP engine and look at the continious power rating output,which is a more realistic use rating it is considerbly less ( 14.5 HP ). So maybe by adding a few more HP I will get the full potental out of the 180 pumps, wheel motors etc. without maxing them out. If the change out is feasable after I get the remaining info. ( max hp for the180 wheel motors, pumps , etc.) then the parts costs ( governor spring, carburetor, throttle shaft ) will be $274.12 plus shipping.
Am I getting the full usable torque and power out of my wheel motors, pumps, etc. now with the 18HP --- I don't know,--the continious rated output HP is only 14.5. Thats what I have to find out.

 

[Phils]

My 422 engine will bog down when I'm going up steeper hills, and bog down when I've got the brush hog going and trying to go uphill. For less than $300 it's $100/hp and I may be one that's gonna go for the change.

Phil

 

[J_J]

If I understand correctly the specs JJ lists are for the PTO pump. That still leaves the pump for the aux circuit and the variable displacement pump that powers the wheel motors. And of course there are the wheel motors that are probably different.

PTO pump data
8 gpm @2000 psi requires 10.9 hp--18 , 22 hp engines
8 gpm @2500 psi requires 13.69 hp-25 hp engines

Can you climb those hills with out using the PTO. That should tell you some thing about your wheel motors. Those other pumps are probably using up as much hp as needed, It then depends on torque generated by the wheel motors.

If you put to much load on a hydraulic motor, it will stall out the engine or slow that engine down.

 

[JackRobin]

Hey guys,

Long time no see... I don't really have the time to read the whole 5 pages of this thread so from reading some of the posts, I just want to let the cat out of the bag on the whole EH63/64/65 hp questions.

The only differences on all three of these models are the carburetor and the governor hole setting. If you guys have any additional questions shoot them my way in this thread, I'll try to answer as soon as I can.

Regards,

Jack Gawecki
Subaru Power Products
Technical Support Dept.
800-277-6246

 

[KMA]

PTO pump data
8 gpm @2000 psi requires 10.9 hp--18 , 22 hp engines
8 gpm @2500 psi requires 13.69 hp-25 hp engines

The Power Trac website shows the PT422 having the 8gpm/2500psi PTO.

If you guys have any additional questions shoot them my way in this thread, I'll try to answer as soon as I can.

I have one... how can we increase the power of the EH65 without affecting reliability?

Thanks!

 

[Beechwood]

Hey guys,

Long time no see... I don't really have the time to read the whole 5 pages of this thread so from reading some of the posts, I just want to let the cat out of the bag on the whole EH63/64/65 hp questions.

The only differences on all three of these models are the carburetor and the governor hole setting. If you guys have any additional questions shoot them my way in this thread, I'll try to answer as soon as I can.

Regards,

Jack Gawecki
Subaru Power Products
Technical Support Dept.
800-277-6246

THANK YOU JACK!!- FOR COMFIRMING MY FINDINGS. I must have read the owners manual and parts manual, and engine specs. at least a dozen times and I could not find any difference other than the carb. and governor settings.

 

[JackRobin]

I have one... how can we increase the power of the EH65 without affecting reliability?

Thanks!

I suggest running NASA rocket fuel in the engine.

 

[BobRip]

I thought there was an oil cooler in the 25 HP engine. So we can just change the carb and spring and up the horse power? Sounds real easy.

 

[JackRobin]

I thought there was an oil cooler in the 25 HP engine. So we can just change the carb and spring and up the horse power? Sounds real easy.

That is correct, I wasn't talking about upgrading from EH6X to EH72, the crankcase for EH72 25hp is diffrent than EH6X series.

 

[Beechwood]

I thought there was an oil cooler in the 25 HP engine. So we can just change the carb and spring and up the horse power? Sounds real easy.

Bob;
The 3 engines are the 18HP, 20.5HP, & the 22Hp. The 25Hp (EH72 ) is a whole different beast.