Chain saw clutch problems?

glessdNovember 24, 2007

Gretings, I've been using my brother's Mac chain saw, a little 38cc w/ a 14" bar to buzz up some cherry and ash around my woods, it has worked fine until now. The clutch is alway engaged, it won't freewheel when I pull to start it.

My question is, How do I get the clutch off to free it up?

I've taken the recoil off, but that nut just releases, what do I use to hold the flywheel to undo the clutch nut?

Any thoughts would be most appreciated, I have about another cord on the ground and would like to get it cut up this week.

Thanks much

Dave G

Thank you for reporting this comment. Undo
nevada_walrus(Boulder City)

Dave, which side of the saw is the recoil and which is the bar and clutch? Most saws have the recoil on the left side with the bar/chain and clutch on the right side. Removing the recoil is pointless.

OK, if your saw is typical with bar/clutch on the right side, the clutch nut will be reversed thread. To loosen you turn clockwise. Remove spark plug, move piston to down position. Use something like clean starter rope to stuff down the plug hole so that when you go to loosen the clutch nut the piston moves up and is jammed by the rope.

The clutch drum bearing may just be dry gummed up and need cleaning and greasing. However the bearing may be shot or the clutch shoe springs could be worn or broken. Drum bearings can be normally found at an equipment shop that carries Oregon brand parts. If the clutch springs are bad and this saw is older when McCulloch actually made them you will have trouble.

    Bookmark   November 24, 2007 at 8:28PM
Thank you for reporting this comment. Undo

Nevada, I looked around and found the rope in the plug hole trick, an old one I forgot about. The clutch is ok, it looks like the bearing is shot, or gummed up, I'm soaking it now. Any good parts sites, or I may just go to my local small engine shop.
Thanks for the advice.
Dave G

    Bookmark   November 25, 2007 at 11:26AM
Thank you for reporting this comment. Undo

i just take a big punch and hammer and smack the inside arm in the loosen direction (not the outer clutch sprocket, but the inter arm with the spring around it with the threaded hole in the middle. Usually spins right off.

IMO the clutch sprocket locks up usually caused by the needle bearings worn and it locks it to the crank. With the chain off you would be able to spin it freely if it don't spin then the needle bearing are frozen or the clutch it expanded out ( not likely though). Clutchs are pretty cheap and easy to replace, just watch where the thrust washer goes...usually only two things go wrong with them. the needle bearings go or the sprocket teeth wears out.

    Bookmark   November 25, 2007 at 5:24PM
Sign Up to comment
More Discussions
1983 troy-bilt cultivator plus wheels
Read with great interest all the posts so far for the...
Have you successful cut any “seasoned firewood” inside?
Have you successful cut any “seasoned firewood”...
McCullough Pro Mac 700 has to be a professional grade saw vs a Home?
Servicing/Starting my Neighbor’s McCullough Pro Mac...
Woodzig electric pruner
I have a Woodzig electric pruner and use it often....
Deep Spader
Has anyone used a deep spader? How did you like it?...
Sponsored Products
Joy Carpets Petal Pushers Kids Area Rug Multicolor - 1542-B
$129.99 | Hayneedle
Crystal Rain Chrome Triple Multi Light Pendant
Lamps Plus
Kichler Monroe 3 Light Chandelier - 23W in. Olde Bronze - 43155OZ
$178.00 | Hayneedle
Twigs Bowl Chandelier
$378.00 | Bellacor
Cortina 22 1/2" High Polished Nickel 3-Light Wall Sconce
Lamps Plus
Clouds Dark Bronze Nine-Light Inverted Cone Two-Tier Chandelier
Aspen Outdoor Pendant by Troy Lighting
$420.00 | Lumens
Side By Side Giclee Glow Plug-In Swag Pendant
Lamps Plus
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™