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Kohler Engines ch26s on a toro 74240 (year 2001) magnets in fly wheel

#1

K

klein

this is the second time i have had to replace this flywheel !
the first time was in 2015 and the magnets were destroyed a lone with the stator. kohler said they were having trouble with there glue.
this time the magnets just came off and were stuck to the stator .
i believe it has a 25 amp stator, (efi) and the ch26 maul states the ohm reading should be .20 ohms and when i read mine with an digital ohm meter i get .40 ohms .
to ground nothing on each wire.
is .40 ohms ok ?

and isn't there anyone redoing these flywheels ?


#2

V

VegetiveSteam

You don't have zero and you don't have infinity so I wouldn't be concerned with 0.40. I'd also check continuity from each stator lead to ground just to be sure.

With all the magnets being stuck to the stator they obviously didn't come off while it was running or you would have had the same issue as before. Have you ever used an air or electric impact on either the pto or flywheel side fasteners?

As far as anyone redoing these flywheels I'm not sure I understand the question.


#3

Hammermechanicman

Hammermechanicman

I have repaired a few flywheels. The magnets come off on their own. No impact wrench needed.


#4

K

klein

i have checked each lead to ground and it was zero. no reading to ground or the housing of the stator .i have never used an in packed, on this engine. only hand tools.
magnets
flywheel


#5

K

klein

hammermech anicman
i have one magnet that is broke in half, so regluing them back in might not work for me. also not all the magnets are the same seems to be 3 shorter than the other three .check links in the above post.


#6

Hammermechanicman

Hammermechanicman

I have glued broken magnets to the flywheel. Usually there are two longer magnets. They go next to each other. Be careful to observe polarity and clean any old glue off magnets and flywheel. I use JB weld to put them back on.


#7

K

klein

there are so many different kinds of JB weld i need to buy ? do you use the two part clear ?

J-B Weld 50112 ClearWeld 5 Minute Set Epoxy Syringe​



#8

Hammermechanicman

Hammermechanicman

No. I use the regular stuff.


#9

Tiger Small Engine

Tiger Small Engine

I have glued broken magnets to the flywheel. Usually there are two longer magnets. They go next to each other. Be careful to observe polarity and clean any old glue off magnets and flywheel. I use JB weld to put them back on.
Surface of flywheel needs to be prepped and cleaned where magnets are glued with JB Weld. Magnets must be placed in correct order and spacing. I have successfully repaired loose magnets to flywheel more than once, and repair has held.


#10

K

klein

after calling parts tree they gave me the number kohler and after going through the auto system it gave me the address to a local dealer, so i called them and they could not tell me, so they are calling kohler and i'm on hold lol
this is a mess this morning . i called parts tree they list two different Rectifier-Regulator

Kohler 25 755 23-S

Kit-Conversion, FullWave (Incl. Ref.#22,25 452 01-S &24 518 12-S)​

(Superseded to 24 755 144-S)

Kohler 25 403 04-S

Rectifier-Regulator​

(Superseded to 24 755 144-S)​


i'm not sure witch one works ?


#11

I

ILENGINE

The answer gets easy. The 25 403 04-s and the 25 755 23-s both supercede to the 24 755 144-s which is the one that replaces both of the regulators that you list. But without the spec number from your engine we can't determine what one that engine had either.


#12

V

VegetiveSteam

after calling parts tree they gave me the number kohler and after going through the auto system it gave me the address to a local dealer, so i called them and they could not tell me, so they are calling kohler and i'm on hold lol
this is a mess this morning . i called parts tree they list two different Rectifier-Regulator

Kohler 25 755 23-S

Kit-Conversion, FullWave (Incl. Ref.#22,25 452 01-S &24 518 12-S)​

(Superseded to 24 755 144-S)

Kohler 25 403 04-S

Rectifier-Regulator​

(Superseded to 24 755 144-S)​


i'm not sure witch one works ?
Do you have the original regulator? If it's OEM Kohler there is a part number on it.


#13

K

kjonxx

I use gorilla glue and so far no problems. Polarity is critical and spacing I did with clothes pins.


#14

S

Shoesole

If you want to make a permanent repair, go to a marine dealer that sells Johnson/Evinrude motors and purchase a flywheel magnet adhesive kit. This is a much better adhesive than JB Weld because outboard motors generally run much faster than the average mower engine and they run for a longer period, so they developed a very strong adhesive to hold the magnets in place (because out on the water, you can't walk home).Trust me, I'm71 years old and have been a marine mechanic for many years. JB Weld is good, but the OMC product is much better, due to liability......


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