2082 power question

[Valleyvfdfirefighter]

Hey guys,

I recently purchased a 2082 locally, model: 141731100 with an 8147... serial. It's to my knowledge the earlier versions of the 2084 came with the 20 HP Onan engine. I'm not sure if this should have been in this tractor or not. However, in 2004 this tractor was said to have had a repower at the dealer. Unfortunately the decals on the engine say kohler Command 18hp.

It has the 60" deck and in high grass, about 5" tall, and on the highest setting on the deck wheels this tractor really struggles to mow. It boggs down a bunch and I have to stay in about the 1st position on the speed selector.

I heard these things mow like crazy, is this common for it to bog down this much? The grass is a little tall but it's not very thick.

I've heard there was a way to bring the 18hp to the 20 hp with a carburetor adjustment? How do I do this. I haven't been able to find it in my searchings.

[R Bedell]

The 2082 (141-731 & 142-732) rolled out of the Factory with a Kohler M20-49584 Engine in it.

The CH-18 would be a downsized repower.

A 18HP engine is going to struggle with a 60" deck under those conditions.

[Oak]

Roland is correct. The last Cub Cadet to use the Onan B48G was the early 2072 and that was ended in 1987. The Mag 20 & 18 are different. I'm thinking the cranks are different giving the 20 a longer stroke and more power. The Mag 15 & 18 are the engines that you could modify the carbs to give more power. What is the size of the pto on the engine and the size of the driven pulley on the deck? You could have a miss-match there.

[J-Mech]

Originally Posted by Oak

Roland is correct. The last Cub Cadet to use the Onan B48G was the early 2072 and that was ended in 1987. The Mag 20 & 18 are different. I'm thinking the cranks are different giving the 20 a longer stroke and more power. The Mag 15 & 18 are the engines that you could modify the carbs to give more power. What is the size of the pto on the engine and the size of the driven pulley on the deck? You could have a miss-match there.

Oak, he says he has a CH18, not a Mag.


Yes, you can bring the CH18 up to 20. There is a throttle limiter on the carb. Remove it and tune it to run under the new load.

OR: I would also remove the carb and using a very small drill bit, find the size that just fits through the hole in the main jet, then use the next size bigger to drill it out. Make sure that you don't use too large of a bit. Bigger is not better. You just need to go a tiny bit larger. Then re-tune the carb.

The CH18 is not much motor for a 60" deck. But it should run it. You likely have an issue somewhere anyway. My bet is the carb is plugged up. Clean the fuel system, replace the hoses, flush the tank and disassemble and clean the carb.... while your there, drill the hole. I really kind of made this post backwards.... but I didn't want to retype it.

[Sam Mac]

Originally Posted by Valleyvfdfirefighter

Hey guys,

I recently purchased a 2082 locally, model: 141731100 with an 8147... serial. It's to my knowledge the earlier versions of the 2084 came with the 20 HP Onan engine. I'm not sure if this should have been in this tractor or not. However, in 2004 this tractor was said to have had a repower at the dealer. Unfortunately the decals on the engine say kohler Command 18hp.

It has the 60" deck and in high grass, about 5" tall, and on the highest setting on the deck wheels this tractor really struggles to mow. It boggs down a bunch and I have to stay in about the 1st position on the speed selector.

I heard these things mow like crazy, is this common for it to bog down this much? The grass is a little tall but it's not very thick.

I've heard there was a way to bring the 18hp to the 20 hp with a carburetor adjustment? How do I do this. I haven't been able to find it in my searchings.

They have a throttle limit screw that won't allow the throttle to go wide open. I've been told that all you need to do is to remove the screw. I have not had the opportunity to do this. As far as I know the screw is what I have circled in red. This was taken with the blower housing removed but you should be able to get at it from the top by removing the air filter and the filter base. Let us know if this works for you.

[Valleyvfdfirefighter]

Okay guys, I made a mistake. Looking through pictures the air filter housing sticker says Magnum 18. Now this could just be a different ail filter cover and I'm not near the tractor right off the bat to look at the engine tag.

From what I'm gathering, if it's a magnum, I'm kind of stuck. However, if I find out that it is a ch18 I may be able to work it a bit to get it to cut like a beast?!

It does cut 3-4" tall yard grass like a beast! It's just when you hit the taller stuff it really boggs down pretty bad. I've evendors already thrown the deck belt twice as it was bogging down.

I'll check the engine data plate later to check and also measure the pullies best I can today to tomorrow.

Otherwise I may be looking for a new motor or deck swap.

[Sam Mac]

Find out what you have first. Second measure the diameter of the PTO pulley, third get us some pics of the deck looking at the center pulley. Lastly with the PTO belt removed see if you can easily spin the blades by hand from the center pulley.

The 1872 also had the Mag18 and it pulls a 60" Haban just fine.

[J-Mech]

Get the information straight please..... Make sure that it is actually a Mag 18 and not just a cover that says Mag 19 on a 20hp motor.

I still highly doubt it's running right. Throwing deck belts shouldn't happen even in tall grass. Pulling hard won't throw a belt.

I'd say carb issues, and maybe a governor that isn't set right. You have problems, but I don't think too small a motor is one of them. They put 60" Haban decks on the 1872. Same motor. Underpowered..... well, yeah... but still should pull it.

[Sam Mac]

One other thing, the Habans do not like wet grass. Take a look under the deck and see if you have a bunch of build up. Ask me how I know LOL.

[Oak]

You probably know but a CH is a V-twin like this.
DSCN0253.jpg

The Mag is an opposed twin.