Mcculloch sp125/101b kart saw build thread

[Bigmac]

Time for the rear av mount, I call this the mcbob Method because that where I heard the idea years ago, I like it, could do things differently, and I might make an aluminum spacer instead of the stainless washers in the future. I like that you keep the full cooling fins on the head and no welding or mods are needed to the head, plus it looks great! Lol

This is the underside, next time I think I will make a one piece plate and weld the bolts.

On the top side, I use these solid shaft spacers to space the shroud alway from the intake manifold

 

[Bigmac]

Installed the nos clutch and drum along with the kart puck muffler

 

[Onan18]

Installed the nos clutch and drum along with the kart puck muffler View attachment 202586 View attachment 202590View attachment 202587 View attachment 202589View attachment 202588

"Muffler"

WHAT DID YOU SAY???!!!!!!

 

[Bigmac]

"Muffler"

WHAT DID YOU SAY???!!!!!!

Haha! So you don’t think I need to do a muffler mod? Lol

 

[p61 western]

Haha! So you don’t think I need to do a muffler mod? Lol

Just need the GEM box muffler lol.

 

[Bigmac]

Just need the GEM box muffler lol.

That will go on the next build! This one I wanted to keep, like they built them, all McCulloch 1974ish!

I should have some more parts coming for the other builds soon! Then I can use up these dang kart motors! lol then some induction testing!! Also want to test some different mufflers, gem, McCulloch box and puck mufflers

 

[Al Smith]

Haha! So you don’t think I need to do a muffler mod? Lol

Just leave the baffle plate out and it will make dogs howl and your ears ring for half an hour .

 

[Bigmac]

Just leave the baffle plate out and it will make dogs howl and your ears ring for half an hour .

That is a fact! My other saw has it removed and has a major bark!

 

[Al Smith]

I have basically the same muffler on a gear drive Mac 650 ,87 cc .With the baffle in place it's loud but doesn't have the guts as when the baffle is out .That old duffer will wind up and is louder .

 

[Bigmac]

Got some parts, going to do two more!

 

[Bigmac]

Wanted to show a couple differences in the spark plug in the reason why the covers are different, here’s a picture of the standard three eights reach saw plug, and a half inch reach kart plug, I haven’t been able to find a short version of the half inch reach plug, it isn’t a huge problem, because you can modify the Saw cover and put the kart boot on, The 101B came with a half inch reach plug head, but there are three eights reach heads out there, just something to think about if you’re planning on a build
Here is an NOS intake boot spring and washers, figured I would show this for people who haven’t seen it
And assembled

 

[Bigmac]

Got some more parts today, able to get the saw mostly completed, just waiting now for some falling dogs and the bar plates

 

[Onan18]

Got some more parts today, able to get the saw mostly completed, just waiting now for some falling dogs and the bar platesView attachment 203748View attachment 203746 View attachment 203747View attachment 203749 View attachment 203750

 

[Bigmac]

Bought a new chain for the bar as well, looking forward to finishing this up

 

[Billy Currie]

I've ran in to the spark plug reach issue before as well. I used an end mill and plunge cut the spark plug seat leaving the desired spark plug reach measurement on the head.

 

[Bigmac]

Got the bar plates and dogs,
I use the slimline spacers on all my bars, gives a little extra clearance

 

[Bigmac]

Bar mounted and basically finished up I am still on the fence for the air filter decal, have been thinking pretty hard about doing the cp125 decal, just haven’t decided

 

[Steve]

Bar mounted and basically finished upView attachment 204002View attachment 204003 View attachment 204001I am still on the fence for the air filter decal, have been thinking pretty hard about doing the cp125 decal, just haven’t decided

Thats one hell of a concrete saw there Nathan!

 

[Intoxsawcated]

That there is one to hang on the mantle.

Sent from my SM-S767VL using Tapatalk

 

[jacob j.]

It's just like it's 1977 all over again.