Hello all,

I've stumbled into a great running chainsaw cheap ($35) for a 2.5cu in McCulloch Pro Mac 610. Anybody have any experience with these?

Like I said, it runs great ( though a bit LOUD). Looks like its a step up from the Ryobi in size (just shy of 41cc) and power. Seems I recall that the Zenoah's started life as chainsaw engines. Seems I also remember a book by Dario Brigsnowsky (?) that dealt with the subject. I can't remember the name or even if thats the correct author. Sound familiar to any one?

I'm having a hard time finding anything on the net about conversions other than ryobi. Any suggestions? (other than leave it in the chainsaw and go clean up the yard).

Thanks,
Wali

There's been a lot of discusson on here about converting the Poulin 46 cc engine. Do a search! rcignition was usually in the middle of the conversations. There are pictures and discussons of problems and solutions as well as sources.

I've done two Homelite, two McCulloch, one Weed Eater, and one Ryobi from weed whackers. They run great.

The McCullochs are 32cc. They both have battery ignition and larger carbs. One has a shaved head.

I also have a couple of McCulloch 32cc chain saws and they are considerably more powerful than the weed whacker variety.

Typical conversions are done by using the flywheel end to attach the prop. Also the exhaust is usually on the right or the rear.

The carb could be on the left but exhaust must be opposit or rear.

The Ryobi has a carb and exhaust in the rear.

You cannot be successful with the carb on the flywheel end of the motor. One of my McCulloch chainsaws has a flwheel side carb. It would not be a candidate for conversion.

Read everything you can.

Good luck

Jim

The McCulloch PRO series should be a little nicer setup than the weed whackers.

Quick check for the crank bearings. Ball bearings are the only usuable ones for use with a prop. Of course you could fix the roller cranks but its complacted.

Wali: Look in some of your old RC magizines. Dario did a over balance job on Quadra engines. He got them to run smoother I guess. Do they still make the model 610 saw? Hang in there, some engine pro may have some data on the Pro Mac 610. Good luck, Captin John

Here is one i bet you haven't heard before...

I have a 42cc Remington chainsaw engine in my 1/3 scale Mr. Mulligan.. The engine kicks butt! Tons of power and turns a MAS Classic 20X6 with no problem... It has spring recoil start, nice aluminum backingplate,Walbro large bore carb, all the machine work, electronic module etc..
The engine was out of a Remington Might mite chainsaw..
If any of you are intertested email me and i'll give you the goods..
It's a great running engine.. It uses the exact same crankshaft and connecting rod needle bearings as the quadras.. The crankcase bearings are different though.

RVD: If you can, please send me a picture or your Remington engine. I would like to very much add it too my engine picture file. Are the crank brgs ball bearing type and how smooth is the egine at various speeds. Thanks Captin John

For those of you who enjoy a challenge and like the saw conversions have a look at Ebay. Have done well there the last 2 years. A 100cc Husky for $98 with shipping and a Sachs 5.8 for $145 shipped. The Sachs is in excellent shape and runs well. Even a 120cc Husky was reasonable for the size of such an engine. [email protected]

CaptainJohn

I have a bunch of pics of the remington already but they are not real good closeups.. I'll take new pictures of it from various angles and write down the part # off the carb (you want a oversize carb with it) then post them up so everybody can look at the machine work involved.. It's worth it, it runs great.. Connecting Rod,Piston, Rod Bearings, Crankshaft from the Quadra42 will fit (same castings) . The only thing is the crankcase bearings. The remington bearings are different than quadra so you wil have to locate a small engine shop or bring the bearings from the remington to a industrial bearing supplier and get them to cross reference them.. The bearings are made by EENA so it shouldn't be a problem..

I have a power mac 310 that was just taking up space. I want to convert it to aircraft. Where would i get an adapter for extension to put prop on? Is there a prop guide for this engine? Any idea how to get or build an engine mount? The chain saw was a McCulloch, I don't remember the bar size, but the motor is hefty. The head is 3 or 4 inches across. Does Anybody know what size Eng this chainsaw has. Thanks for any help Merry Christmas. Ps does anyone know where i could get a giant scale spacewalker.

a 310 mac is a 37cc engine 2.4 inch.