McCulloch muffler
 

i've got a couple of the 32cc McMCulloch engines, which I've stripped down and converted. Nice little engine, much shorter than a Ryobi and should fit better in the Ultra Hots I'm putting together this winter.

So, I've got the engine mounting plate made, carb modified, prop shaft designed and turned with Hall magnet installed, JE ignition all set up and functioning, and a nifty test stand made of gen-yu-wine oak plywood. I'm all ready to spin it over, just as soon as I can figure out what to do with the $%*@ exhaust sysyem!

The stock muffler is a box-shaped affair, held on by a U-shaped piece of wire and a spring on one end and hook on the other. Got it off with some grunting, but can't get it hooked back on for nuttin'! It needs gutting, too, but it is a pretty solidly built unit and I'm sure I'd destroy it getting it apart.

Anybody know of muffler setup that fits this beast? Peter Faith has a prototype, but it's not ready for sale yet; Carr Precision shows the McCulloch engine on his website, but has not answered my email yet. Suggestions???

Kiv

RE: McCulloch muffler
 

Kiv, I talk with Pete quite a bit and more than once we've talked about the Mac's @#% muffler. I'm sure hes told you what I'm going to say here. Plug up the hole, drill for whatever large size pipes you want to use and put them out the top or bottom. Its really all we can do for now untill Pete finds a way to make them with less effort and time. AS far as putting the spring clamp back on, Its like working on drum brakes on a car. Hold the muff in place, attach the wire clamp in the front of the motor. Have the spring and wire clamp wraped around the muff and use a flat screwdriver with the free end of the spring looped over it. Put the tip of the screwdriver on the hook on the motor's head and push the srewdrivers handle away from you so the spring will slide down the screwdriver shaft and onto the hook. Thats it.:D Piper

RE: McCulloch muffler
 

C-H sells a Abell aluminum muffler for the 32. It is held on by screws that go into two aluminum rods that you drill down through the fins and the screw the muffler on.

I use these mufflers but I shortend the spring loaded original rod and hold them on in the original manner.

The original muffler is rather adaptable. You just need to braze the new tubes in. Use pieces of the largest gas line you can get from the auto parts store.

I used a hook made of piano wire to get enough grip on the spring to get it over the piece on the engine.

good luck,

jim

RE: McCulloch muffler
 

Thanks for the info, guys! Here's some more info for those who are working with the 32cc Mac weedeater engine.

I called CH and they said they were no longer in the muffler business, but said that Abell had two versions for the McCulloch that would work, the Weedie and the Weedie II. The Weedie uses the original spring and wire affair that comes with the stock muffler, the other has bolts. The one with bolts is actually for the blower version of the Mac, which comes with threaded spigots on the cylinder. The weedeater head version has the wire and spring clamp on style.

The key difference between this engine (either version, BTW) and the Ryobis, Homies, etc. is that the cylinder exhaust port needs a muffler with a sort of flange that seats into it, as opposed to the flat exhaust port with gasket that the others have.

Abell does have both styles available (includes the flange-type exhaust mount), although a bit pricey.

Terry at CH said that they've been flying one of these Macs for 4-5 years and only seems to get stronger with more running time. It easily spins an 18-8 at 8000.

Kiv