modifying courage 20 v-twin
- Thread starter frogfrog
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JTKub
Veteran Member
A source for carb jets? Grab the part #'s of a larger HP kohler command. You need more than 20hp for cutting grass?!? If that's the case, you need a bigger tractor.
Joel
Joel
It is true the only difference between any of the Courage twins is within the carburetors. I am researching exactly what is diffferent between the various HP carbs used on the Courage engines, it might be more than just the main jets, I'll let you know what I find out, and if the carbs can be modified. Many of the new carbs today have fixed main jets with no mixture adjustment needles, and on some the jets can't be removed or changed, (government emissions stuff) which is likely to be on the Courage carbs if you found no part numbers for the main jets.
I don't think I would waste the $150 or so to switch carbs for the few extra HP, but if its just a few bucks worth of internal carb parts and you really want to do it, why not? However, I would not try any mods if the engine is still under warranty as it will for sure void it.
-Fordlords-
I don't think I would waste the $150 or so to switch carbs for the few extra HP, but if its just a few bucks worth of internal carb parts and you really want to do it, why not? However, I would not try any mods if the engine is still under warranty as it will for sure void it.
-Fordlords-
Thanks for the replys, please let me know what you find out. Jtkub , you are correct in that I need no more power, as a matter of fact my lt 1045 is overkill itself but I just like to tinker. I just did the idler bushing fix myself on a 1 week old mower because I didnt want to take it to the shop ( it took all of 10 minutes )
This gets interesting: Looks like the 20 and 23 HP Courage twins use the same KH32-853-03S carb and the 25 and 27 use the same KH32-853-04S. The overhaul kits for all the carbs use the same KH24-757-46S kit, which is what should contain the jets and thus all the jets would be identical.
If anyone figures any of this out and how they get the 4 different HP ratings, let me know!
-Fordlords-
If anyone figures any of this out and how they get the 4 different HP ratings, let me know!
-Fordlords-
strkpr00
Member
- Joined
- Jun 30, 2006
- Messages
- 25
ummmm like this? type in briggs [search] there are a few http://videos.streetfire.net/search/briggs/0/wm/36FDE95E-F4B6-4202-87D9-2FB81F4B75A1.htm
Now THAT was a fun video clip! I like how they stated, "Briggs rev that high." Yeah, but for how long?? With no intercooler or fan shroud and with what little oil pressure that engine makes, I bet it wouldn't take long for that puppy to seize. Can't stop watching that video though 
-Fordlords-
-Fordlords-
strkpr00
Member
- Joined
- Jun 30, 2006
- Messages
- 25
I guess I hijacked this forum, check this one out.
http://videos.streetfire.net/search/5hp/0/wm/F556ECEB-3062-4525-976B-CBDFFDB8FE6A.htm
http://videos.streetfire.net/search/5hp/0/wm/F556ECEB-3062-4525-976B-CBDFFDB8FE6A.htm
You have to wonder what possesses people to try that sort of stuff-- I think as they mentioned, just boredom But any motorhead has to love watching it!
Once they finally got that mower to run off the nitrous without backfiring, and that it could handle it, is a testament to how strong some of these small engines are today. I've seen them run nitrous on Kohler K singles for pulling, but those engines have been beefed up inside.
I said it before, this site needs a forum just for small engine discussion!
-Fordlords-
But any motorhead has to love watching it! Once they finally got that mower to run off the nitrous without backfiring, and that it could handle it, is a testament to how strong some of these small engines are today. I've seen them run nitrous on Kohler K singles for pulling, but those engines have been beefed up inside.
I said it before, this site needs a forum just for small engine discussion!
-Fordlords-
dqdave1
Veteran Member
I did NO research but are the HP ratings at different RPM? You can realize different HP at different RPM. Manufactor can rate HP differently by specing at say 3200 RPM and the other at 3600 RPM. Also check bore and stroke and valve size.
Every part except for the carbs is the exact same (same displacement..bore, stroke.., valves, cams, etc) between the 4 HP ratings, and they are all rated at the same 3600 RPM. It's mysterious now that I believe they are doing this with only 2 different carbs all with the same main jets.
There looks to ba absolutely nothing that would make the 27 HP Courage twin any bigger, better, or more expensive to build than the 20 HP version, so why do they even bother with the different ratings? I think it is nothing more than a marketing gimmick.
-Fordlords-
There looks to ba absolutely nothing that would make the 27 HP Courage twin any bigger, better, or more expensive to build than the 20 HP version, so why do they even bother with the different ratings? I think it is nothing more than a marketing gimmick.
-Fordlords-
kenrs
New member
Like everything I do..............
I won't be able to spend alot of time here, but I love to peek in, it's a three-child-never finished being a foolish teenager-induced-Adult ADD...But anyway, here is my two cents....................
I bet if they loaded up that motor in the video, they could make a S-Load of power for a bit. I've seen people squirt a little NOS into 4HP B&S's on push mower and create screamers. But they blow up in seconds.
Load 'em up and both sides push back.
Not that I would do this with a newer piece of equipment, but we can blow up anything on straight gas, just over-rev it. How about loading it up?????
Maybe a 10HP oldie on NOS could outpull a 25HP new CC in a tug of war??
Only traction and stamina baby........
Maybe I'll pull my new CC against my OLD 11HP "Companion" NO JOKES. But with the Companion on NOS..............................
Who do think would win.
Ken
I won't be able to spend alot of time here, but I love to peek in, it's a three-child-never finished being a foolish teenager-induced-Adult ADD...But anyway, here is my two cents....................
I bet if they loaded up that motor in the video, they could make a S-Load of power for a bit. I've seen people squirt a little NOS into 4HP B&S's on push mower and create screamers. But they blow up in seconds.
Load 'em up and both sides push back.
Not that I would do this with a newer piece of equipment, but we can blow up anything on straight gas, just over-rev it. How about loading it up?????
Maybe a 10HP oldie on NOS could outpull a 25HP new CC in a tug of war??
Only traction and stamina baby........
Maybe I'll pull my new CC against my OLD 11HP "Companion" NO JOKES. But with the Companion on NOS..............................
Who do think would win.
Ken
I recently contacted kohler by phone regarding a question about an old kohler i am fixing for my log splitter. I asked the guy about the different hp ratings of the twin, and he said its not just carbs, but the ignition too( I havent looked at the parts yet). I also asked about this 750 hour lifespan I have heard about, and he said that consumer engines are tested to different intervals, but not designed to fail at a shorter life. He also said that the courage uses command rods, pistons, rings, iron liner. I havent checked this out myself yet, but I may cross some parts and see.
I compared ignition parts and they are all the same on the 20, 23, and 25 HP Courage engines, same module and flywheel. The 27 version has slightly different part numbers for its module and flywheel. I didn't compare any parts th the Commands, but am sure many of the internals are the same.
Just on a side by side comparison, it looks to me that the Courage blocks are made from a lighter, more porous aluminum and this is probably where the cost savings is at compared to the Command line. With the same cast iron liners, a Courage could very well last as long as a Command, but the intent of the Courage engine was indeed to compete with the Briggs Intek in the economy range of engines.
I guess my gripe with what is going on, and it's not just Kohler doing it, is that there is really nothing significant on most of these small engines that should make one HP rating cost more than the ones above it, the Courage line is just a good example.
-Fordlords-
Just on a side by side comparison, it looks to me that the Courage blocks are made from a lighter, more porous aluminum and this is probably where the cost savings is at compared to the Command line. With the same cast iron liners, a Courage could very well last as long as a Command, but the intent of the Courage engine was indeed to compete with the Briggs Intek in the economy range of engines.
I guess my gripe with what is going on, and it's not just Kohler doing it, is that there is really nothing significant on most of these small engines that should make one HP rating cost more than the ones above it, the Courage line is just a good example.
-Fordlords-
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