For the CV22 on my Snapper walkbehind, I tossed the stock air filter setup for a Donaldson 2-stage air filter. I fabbed a mount just above the engine for the filter housing, and bought the Kohler air inlet that they have for the "Donaldson" spec engine. I do use the original style air filter during the winter, as I made fabbed up an air filter housing that draws air from over the exhaust, so the carb doesn't ice up then (I made a plow to replace the mower part for winter use).
Does your Kohler Command want a bigger Air Filter?
Doing Spring prep on some of my tractors, which include a couple 3200s and a couple 5252s.
They all have 25 HP Kohler Commands in them and I assumed took the same air filter, but I assumed wrong.
The filter on the 5252s is about 10 MM taller.
PN: KOHLER 24 883 03-S1 on the 5252s
PN: KOHLER 47 883 03-S1 on the 3200s
Doing a part search I find that the only difference is the air cleaner base bracket, PN: KH-24-126-206-S and the inner seal, PN: KH-24-032-03 (PNs for the 3200 parts)
I considered buying the 5252 parts, but when I looked at the parts I found that it would be easy to modify the air cleaner base brackets on the 3200s.
I used a grinder to cut away the head of the stud and then inserted a metric bolt of the correct length in it's place. I put a normal hex nut on the bolt and then a nylock locknut on top of that.
That worked out great as it made up the difference in the inner seal height.
It seems like a very simple and cheap upgrade. I should have slightly less restriction and the bigger filter should last longer before needing replaced.
They all have 25 HP Kohler Commands in them and I assumed took the same air filter, but I assumed wrong.
The filter on the 5252s is about 10 MM taller.
PN: KOHLER 24 883 03-S1 on the 5252s
PN: KOHLER 47 883 03-S1 on the 3200s
Doing a part search I find that the only difference is the air cleaner base bracket, PN: KH-24-126-206-S and the inner seal, PN: KH-24-032-03 (PNs for the 3200 parts)
I considered buying the 5252 parts, but when I looked at the parts I found that it would be easy to modify the air cleaner base brackets on the 3200s.
I used a grinder to cut away the head of the stud and then inserted a metric bolt of the correct length in it's place. I put a normal hex nut on the bolt and then a nylock locknut on top of that.
That worked out great as it made up the difference in the inner seal height.
It seems like a very simple and cheap upgrade. I should have slightly less restriction and the bigger filter should last longer before needing replaced.
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"as I made fabbed up an air filter housing that draws air from over the exhaust, so the carb doesn't ice up"
same procedure when flying an airplane in icing condition, but we were told not to use only when needed, as RPM's do drop when using it........?...Cold dry air holds more fuel
any noticeable difference in your case
same procedure when flying an airplane in icing condition, but we were told not to use only when needed, as RPM's do drop when using it........?...Cold dry air holds more fuel
any noticeable difference in your case
The engine runs fine, down to about -30C (coldest it got while I was using it this last winter). Before I made the mod, the engine would have problems starting at about -15 to -20C.
My version of the CV22 was designed specifically for a commercial, summer-use only purpose (mowing), whereas other versions use a different style air cleaner setup, and for those models, Kohler sells a cold-weather kit that does the same thing. A Kohler tech support guy recommended I do something like this to make it work in cold temps. It basically just boosts the intake air temp to be in the same range as during the summer (about 10C to 30C or so).
Same thing is used on cars with carbs, they had shield over one of the exhaust manifolds, with a short tube to the air cleaner housing to get warmer air during the winter. Only difference with my setup is they would have a temperature sensitive valve to close off the heated air when it got over a certain temperature.
These engines aren't tuned to extract their maximum possible performance, and the governor is what sets the engine speed/power.
I do need to make a further mod, as when it gets into the -25 to -30 range, the engine doesn't like starting on it's own, and I need to use a bit of starter spray in the intake to get it going, and it is a hassle/pain to remove the air cleaner housing, then the air cleaner, spray & starter, then reassemble it when it's that cold out. I need to figure out a way to spray that stuff in there that I can easily open/spray&start/close.
My version of the CV22 was designed specifically for a commercial, summer-use only purpose (mowing), whereas other versions use a different style air cleaner setup, and for those models, Kohler sells a cold-weather kit that does the same thing. A Kohler tech support guy recommended I do something like this to make it work in cold temps. It basically just boosts the intake air temp to be in the same range as during the summer (about 10C to 30C or so).
Same thing is used on cars with carbs, they had shield over one of the exhaust manifolds, with a short tube to the air cleaner housing to get warmer air during the winter. Only difference with my setup is they would have a temperature sensitive valve to close off the heated air when it got over a certain temperature.
These engines aren't tuned to extract their maximum possible performance, and the governor is what sets the engine speed/power.
I do need to make a further mod, as when it gets into the -25 to -30 range, the engine doesn't like starting on it's own, and I need to use a bit of starter spray in the intake to get it going, and it is a hassle/pain to remove the air cleaner housing, then the air cleaner, spray & starter, then reassemble it when it's that cold out. I need to figure out a way to spray that stuff in there that I can easily open/spray&start/close.
Off-topic but in the same vein.... the newer Kohler 7000's looks like they can be upgraded to a bigger air filter just via replacing the upper air housing with a pro model one.
There wouldn't be any bad impacts to a bigger air filter would there? Wouldn't mess with air volume the engine is tuned for?
I'm thinking of doing the swap to run a bigger filter for my KT745 but only if it is good for the engine.
There wouldn't be any bad impacts to a bigger air filter would there? Wouldn't mess with air volume the engine is tuned for?
I'm thinking of doing the swap to run a bigger filter for my KT745 but only if it is good for the engine.
Assuming the original filter was not restrictive when new, I do not expect that a larger filter would have any effect on the air/fuel ratio.
When the filters get dirty is when the larger filter will provide reduced restriction.
When the filters get dirty is when the larger filter will provide reduced restriction.
Thanks for the opinion. I'll likely upgrade to the larger air filter when it comes times to change it.Assuming the original filter was not restrictive when new, I do not expect that a larger filter would have any effect on the air/fuel ratio.
When the filters get dirty is when the larger filter will provide reduced restriction.
My 2005 LT 2042 18hp Kohler had a taller filter then my new XT3 GS 22.5hp Kohler so when I installed the taller filter in my new GS I just removed the wing nut (because the cover would not screw down) and placed a couple washers over the stud and screwed the air cleaner cover on which tightens against the washers to hold the filter down. Seems to work pretty good. I like having the larger filter not sure if it makes a difference or not but I'm happy.Off-topic but in the same vein.... the newer Kohler 7000's looks like they can be upgraded to a bigger air filter just via replacing the upper air housing with a pro model one.
There wouldn't be any bad impacts to a bigger air filter would there? Wouldn't mess with air volume the engine is tuned for?
I'm thinking of doing the swap to run a bigger filter for my KT745 but only if it is good for the engine.
Sent from my Nexus 6P using Tapatalk
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