Snapper series 6 Briggs model 191707 type 251501 Having trouble removing drive pulley .

[Snapper series 6 1987]

Trying to remove the drive pulley and wondering if the pulley has to be unscrewed or just removed by heat and tapping. There are threads visible inside the bottom of the pulley but nothing I can find says it has to be unscrewed. There is no bolt from the bottom. Possibly it fell off but it's an old machine so not sure. Thank you for any information. Penumbra75@aol.com is my email.

 

[ILENGINE]

The disc should unscrew from the shaft collar. The shaft collar is held on by if I remember correctly 2 set screws, and then should slide off if not stuck to the shaft.

 

[Snapper series 6 1987]

The two set screws came out so easily I thought I had it made. Been trying all the usual sprays (ATF, WD 40 etc) heated it up and tried driving the shaft while the motor was suspended with 2x4's under the pulley. Initially I figured there had been a retaining bolt from underneath but none show up on the diagrams or videos. I'll see if it will unscrew and then heat it up with MAP or acetylene if I can find someone with a torch. All the shops around here (Mandeville , LA) are gone and the dealers only want to sell me one of those $4000 zero turns that must weigh 500 lbs or more. Thank you for the tip. When I saw those threads starting to chip off inside the collar I figured I better ask to see if anyone has dealt with this specific drive pulley. I'm an old disabled jarhead and I really need to get this "ole reliable" going again. Thank you again for helping. Let's see if it works!!!

 

[slomo]

Guessing she is rusted onto the crankshaft. Two set screws are all I know about securing it on the crank. I couldn't get mine off either.

There is an adjustment needs to be made. The depth of the steel drive disk TO the rubber ring, driven disk. If yours doesn't pull a hill then you need more contact here.

Several ways to remove it. Candle wax and a propane torch. MAP gas is no longer made. It was only 50 degrees F hotter anyway. Everyone swore by MAP gas LOL. Basically the same burn temp as propane. Air hammer if you can get on it. Soak it in PB Blaster for a couple weeks no joke. Spray it down daily.

 

[Snapper series 6 1987]

Thank you for the tips. If the pulley is not screwed onto the shaft that makes things easier. I've been soaking it and every now and then giving it a whack with a socket on the end. I've tried the candle wax but I think I put the flame too near the crankshaft so it was also hot.

Also very helpful to know about the MAP gas. A torch with one tank is $70 , I've got several propane tips so I can save the $70 for a mere 50 degrees hotter. It's actually moved a little , what stopped me was seeing those metal shards inside the opening. I've got the engine hanging upside down with the weight on the pully via 2 2x4's.

The main reason I put up the post this morning was to ask about weather the pulley was screwed onto the crankshaft. I have compressed air so I can hammer it as well. Thank you again.

 

[hlw49]

Snapper had a special puller to remove the drive disc off the engine. Use to have one but can't find it now