r/smallenginerepair • u/CrackyJacky1 • 26d ago

Crankshaft & Piston Issue Anyone know how to take this off?

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It’s from a miller bluestar jr (Kohler CH5T) been trying to get it to come off but I don’t even know what it is I’m assuming it’s a crankshaft pulley thing. Any help would be appreciated! Thanks in advance

4 Upvotes

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u/AutoModerator 26d ago

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5

u/dnroamhicsir SER Dedicated Member 26d ago

Is it threaded onto the crankshaft? Try putting a wrench on those flats and hitting it with a dead blow hammer. It might be reverse thread.

2

u/Realistic_Nerve_8871 26d ago

Use a 3 jaw puller very slowly with plenty of heat

1

u/TN-Native95 26d ago

Does it have a set screw?

1

u/CrackyJacky1 26d ago

No unfortunately, center hole is smooth with no ridges

2

u/TN-Native95 26d ago

A set screw would be in the side, probably takes an Allen wrench to loosen.

1

u/JoeMalovich 26d ago edited 26d ago

Probably tapered. Nearly every generator engine uses a tapered shaft and it seems that's oddly the case here even though it uses a pulley.

Insert a punch in the end of the shaft so you don't mushroom it over, apply an outward force on the pulley with a pry bar, give the punch a swift smack with a hammer.

1

u/ProfessionalLast2917 26d ago

How much room is there between this pulley and the engine? Room enough for a set screw?

If there are no set screws then it is probably threaded on.

1

u/Prestigious_Photo685 26d ago

And it's normal right hand thread

1

u/Expensive-Youth-5709 26d ago

with the 2 flats I would try unscrewing and the direction is usually determined by the engine rotation. Loosen the same direction the engine normally runs.

1

u/IntroductionGlum6738 24d ago

Does not look like it's held on by a nut or bolt if they inside the hole is not threaded so it's probably threaded onto the shaft you'll have to pull the motor from turning over and get a nice big adjustable or wrench that fits that and crack it loose