Magnum 18 Magnum 15 Twin Difference

[J-Mech]

Originally Posted by Mechanic

I cannot totally read the model number. There is a faint M, no 1, a faint 8 and a faint S.

Spec. 24647
Serial 2011508446

The model is: M18S, so yes that is correct.
The spec # matches as a Mag 18

Originally Posted by Mechanic

I am new to this model engine. Are aftermarket rebuild kits available for it?

Only if you have deep pockets (you can replace it for the same price) and know a shop that can sleeve. Pretty limited as far as piston sizes and internal parts availability.

[ccannon222]

J-Mech,

Thank you for the explanation. I should be able to get to my spare engines this weekend. I have two M15's and a M18. I know the spec numbers on the engines are the same. I will try to take some pics of the carbs and see if I can pull the numbers off of the carb.

You mentioned the M15 may have a WOT limiter. Would this be external to the engine limiting the amount the carb throttle could be opened or would this be something internal?

Chris

[J-Mech]

Originally Posted by ccannon222

You mentioned the M15 may have a WOT limiter. Would this be external to the engine limiting the amount the carb throttle could be opened or would this be something internal?

Chris

Should be external. I noticed in the parts book that for some reason it states different part numbers for the governor control rod between the two engines. May be just a minor difference/change and totally irrelevant, but the limiter may be in the linkage.

[Mike McKown]

Originally Posted by Mechanic

The carb that is on the engine has both low and high speed jet adjustments on it.

This engine will be rebuilt and made to breathe a bit better. I am going to need to make the carb perform up to the engines expectations.

I have only had the tractor for a few days and it has not been in the shop yet. Paid $350 for it without a deck.

I cannot totally read the model number. There is a faint M, no 1, a faint 8 and a faint S.

Spec. 24647
Serial 2011508446

I am new to this model engine. Are aftermarket rebuild kits available for it?

I just looked at the tag on my 1535 engine.

Says it's M 18S and spec # is same as yours, 24647.

[Mechanic]

Thank you for checking the numbers on your M18S.

So, by what method is the engine de-rated to 15 horse.

[Mike McKown]

Originally Posted by Mechanic

Thank you for checking the numbers on your M18S.

So, by what method is the engine de-rated to 15 horse.

Marketing?

[Mike McKown]

Unless I missed something, this page says the carbs and all important internal parts along with governor linkage is the same between the 186X engines and the 153X engines. Along with other applications.

http://www.partstree.com/parts/cub-c...59/carburetor/

[Sam Mac]

This is from Small engine warehouse

"

Repower old Equipment



Cub Cadet 1541 Category

Available replacement parts listed below, please click product number to view more information about each replacement part.

Original Model: Kohler Magnum M18 24646

This was an 18hp engine that Cub Cadet labeled a 15hp.

[Mike McKown]

Kohler parts list says the m 18s spec 24646 and 24647 used the same carb kit with either a 52-053-50 or 52-053-66 carburetor.

[RR1862CC]

The engine I pulled out of the 1541 has an M18s spec tag but the tin says Magnum 15