422 blew up part II

[scarg]

I have been researching small engines for the past few weeks and settled on a liquid cooled digital fuel injected 29HP Kawasaki - Kawpowr.com - 4 Cycle Engines

I will have to relocate the radiator and possibly the air cleaner to make it fit but other than that it should eliminate all concerns about the 422 being under powered and all of the cold starting issues.

The torque curve is very flat and above 40 in lbs at all rpms above 2000. The robin 22hp was only 32 or so.

If anyone is interested i can make a "kit" for the 422 with drawings etc.... otherwise i will make it without drawings to move things along faster.

 

[SnowRidge]

I hope it goes well. Looking forward to your posts on the project, with photos, of course.

 

[ponytug]

It looks like a nice engine.

I notice that Scag uses them in their zero turn radius mowers, and that they suggest a maximum slope limit of 15 degrees. You might want to check with Kawasaki to make sure that your slopes aren't steeper than the oil pump can handle.

How steep are your slopes, by the way?

All the best,

Peter

 

[BobRip]

I have been researching small engines for the past few weeks and settled on a liquid cooled digital fuel injected 29HP Kawasaki - Kawpowr.com - 4 Cycle Engines

I will have to relocate the radiator and possibly the air cleaner to make it fit but other than that it should eliminate all concerns about the 422 being under powered and all of the cold starting issues.

The torque curve is very flat and above 40 in lbs at all rpms above 2000. The robin 22hp was only 32 or so.

If anyone is interested i can make a "kit" for the 422 with drawings etc.... otherwise i will make it without drawings to move things along faster.

I would love to upgrade my engine for the extra wheel motor torque, as I assume this will help. Will your kit work on the PT 422s that have pumps behind and in front of the engine? I understand the Robin engine requires a crankshaft modification for this.

 

[bjustice]

If anyone is interested i can make a "kit" for the 422 with drawings etc.... otherwise i will make it without drawings to move things along faster.

I can't ask you to make a kit--however pictures are a must. If this engine will fit in a 422, it should fit in a 2422, and also in the 425 series. With all the interest in the "stronger" wheel motors, a higher-horsepower LIQUID-COOLED engine would seem to be very high on the list of upgrades. These machines don't wear out; all the components can be replaced; the "new model" is just as "pretty" (it's a tractor) as the "old model" so that is no reason to buy a new one. Upgrades make sense, maybe you should make a kit.
Bill

 

[Barryh]

I have been researching small engines for the past few weeks and settled on a liquid cooled digital fuel injected 29HP Kawasaki - Kawpowr.com - 4 Cycle Engines

I will have to relocate the radiator and possibly the air cleaner to make it fit but other than that it should eliminate all concerns about the 422 being under powered and all of the cold starting issues.

The torque curve is very flat and above 40 in lbs at all rpms above 2000. The robin 22hp was only 32 or so.

If anyone is interested i can make a "kit" for the 422 with drawings etc.... otherwise i will make it without drawings to move things along faster.

Very interesting, you may end up with a new breed of super PT. I agree pictures would be great.

 

[scarg]

Ponytug,

Thanks for your reply. Generally my slopes are much less than 15º and nearly flat. However I do have some pretty steep areas that i could not climb with the 422. I am not sure of the slope on these but they are roughly 30º if i was to take an eye ball guess.

The 15º limit on the Scag appears to be related to safety for the operator and not related to the engine.

The new 2007 Model 429 PT's engine uses a pressurized positive displacement oil pump which takes in the oil very close to the bottom (less than 1/4" ?")of the crankcase bottom with a flat large surface area intake nozzle. Judging by he position of this i would expect that you would be safe at well over 30º slope. Even if the engine was almost on it's side (~70º from operation position) it appears as though it would still be able to pump the same as if it was in normal position since the positive displacement pump has no choice but to output the same amount of oil in any orientation (provided it is still getting oil!)

If i am missing something please someone let me know...

Any and all input is greatly appreciated.

BR,
Steve

 

[scarg]

Not sure- I have not seen one of those. However anything is possible and perhaps kawasaki offer this option. I have note seen it yet but it is possible.

Steve

 

[scarg]

oops - was in response to ...

Bobrip -
I would love to upgrade my engine for the extra wheel motor torque, as I assume this will help. Will your kit work on the PT 422s that have pumps behind and in front of the engine? I understand the Robin engine requires a crankshaft modification for this.....


Not sure- I have not seen one of those. However anything is possible and perhaps kawasaki offer this option. I have note seen it yet but it is possible.

Steve

 

[ponytug]

1st- If your land is flat, then it is a non-issue. If it isn't, just ask Kawasaki; I am sure that they will tell you. I know the Robins/Subaru numbers, because I called and checked, when I was considering a 425. According to them, 20 degrees is their maximum sustained angle, and 25 degrees only for short time periods.

Generally, the limit has to do with both where the pickup is, and where the rest of the oil is. If the pickup is covered, but the oil is being splashed by the crankshaft, you get foamy oil, oil plastered on the side of the crankcase and not alot of oil being pumped around. Race car mechanics, rally drivers, and aircraft engineers tend to worry about these things, but most of the rest of us never encounter a problem where it rears its ugly head.

There are lots of solutions, dry sumps, dual oil pumps, swinging oil pickups, but beyond the scope of what you need, or probably want to think about.

I just wanted to make sure that the engine would do what you need it to do.

All the best,

Peter

Ponytug,

Thanks for your reply. Generally my slopes are much less than 15ｺ and nearly flat. However I do have some pretty steep areas that i could not climb with the 422. I am not sure of the slope on these but they are roughly 30ｺ if i was to take an eye ball guess.

The 15ｺ limit on the Scag appears to be related to safety for the operator and not related to the engine.

The new 2007 Model 429 PT's engine uses a pressurized positive displacement oil pump which takes in the oil very close to the bottom (less than 1/4" ?")of the crankcase bottom with a flat large surface area intake nozzle. Judging by he position of this i would expect that you would be safe at well over 30ｺ slope. Even if the engine was almost on it's side (~70ｺ from operation position) it appears as though it would still be able to pump the same as if it was in normal position since the positive displacement pump has no choice but to output the same amount of oil in any orientation (provided it is still getting oil!)

If i am missing something please someone let me know...

Any and all input is greatly appreciated.

BR,
Steve