Hot saws

[undee70ss]

I have old saws, but no race saws. The problem with building a old saw for race is parts.

[sawnami]

A friend has this one. It is the rare combination of fast and old. McCulloch kart saw. It will literally make your ears bleed when it's at full RPM. The saw takes no prisoners. It's embarrassed scores of modded modern saws.

I've got a Root with a Power Products AH-58 that I've been causally looking for kart parts for. Power Products offered lightened rods, pistons with pinned rings and cylinders with open exhaust ports, dual carb intakes with the second carb kicking in beginning at 4,000 RPM, etc. The parts are rare and insanely expensive if you ever do find any.

[Clasec]

sawnami I am wanting to build a McCulloch saw with a kart engine. I have several 100cc kart engines and wanted to know what saw he started with if you could tell me. Looks like a 250 but is hard to tell. I also know a collector of Power Products. I'll ask if he has kart parts for those if he has any I'll let you know.  

[sawnami]

Feb 4, 2017 0:48:31 GMT -5 Clasec said:

sawnami I am wanting to build a McCulloch saw with a kart engine. I have several 100cc kart engines and wanted to know what saw he started with if you could tell me. Looks like a 250 but is hard to tell. I also know a collector of Power Products. I'll ask if he has kart parts for those if he has any I'll let you know.  

I believe that it does have a 250 chassis. The true kart engines have to have the crank changed due the PTO side being different between a saw and kart. That seems to be the kicker in setting up a kart engine as a saw. I found a pristine 101 on a kart a few months ago and learned from him that I would need to come up with a crank. They can be made to be pretty wild runners. He had one a few years back that literally exploded in a race and broke his hand.

[sweepleader]

I went the other way once as a teenager in the late '60s. I got a Mac with a broken out crank keyway for free from a shop I worked in part time. It was relatively new but not considered worth a crankshaft to restore it to cutting. I hand filed a fat key to fit the bad keyway, cut off the tanks and handles, fabbed a mount and put it on a minibike. With 10" wheels and no suspension it was something else. I don't know anymore what model the saw was but the bike was VERY fast. In normal minibike fashion, it had a centrifugal clutch and only one gear, 0 to 50 mph as fast as you could hang on. Wish I still had it. Lots of minibikes in those days. Hadn't thought about that one for a long time, thanks for reminding me.

[mnesler]

Thanks for the advise I will keep looking for something to build. I got a 750 but can't bring myself to modify it. Hopefully I'll find something soon . Love the old muscle saws

[Clasec]

sawnami If I am correct you can use a chainsaw clutch from a 797 123cc on a 100cc  kart engine. The 797 parts saw I have has the same crank end as the kart engines. Tapered and keyed. Don't know on the 101's as I don't have one to compare.

[sawnami]

Boy, I don't know for sure myself. Just went by what he told me. He's got a bunch of 100cc plus McCullochs. He even has a BP-1-(the holy grail).

[Clasec]

Nice saw I've never seen one in person, but I always thought a Super 250 that would start hot was the rarest.

[onlyhomelites]

Feb 4, 2017 22:56:47 GMT -5 Clasec said:

Nice saw I've never seen one in person, but I always thought a Super 250 that would start hot was the rarest.

Funny, I thought that about any 10-10 I've ever used! Part of what converted me to Homelite!

[sweepleader]

As a teenager I worked for a fencing and firewood company, we always had trouble with Mac's too, although I don't remember any professional ever working on them. The outfit bought a Stihl as "very expensive so it must be good" and the boss promptly straight gassed it! Then he found out just how expensive it really was. When it had oil, it was very good. We never used Homelites but I already had my XL-500 and it out cut most of the other saws around.

[Clasec]

All this talk about XL500's is making me want to run mine. I can't believe its sat on the shelf since I bought it two years ago and I haven't used it once. How time flies.