McCulloch Chain Saws

Arborist Forum

Help Support Arborist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Hey fellas, I have a buddy who wants to sell a mcculloch WWII Drone aircraft engine model 4318A. He wants quite a bit for it. I think its a unique engine being a (4) cylinder two stroke engine. What are your thoughts?? Do people still use these engines? Are they kind of rare? What price do they bring?
 
Hey fellas, I have a buddy who wants to sell a mcculloch WWII Drone aircraft engine model 4318A. He wants quite a bit for it. I think its a unique engine being a (4) cylinder two stroke engine. What are your thoughts?? Do people still use these engines? Are they kind of rare? What price do they bring?
They are worth whatever someone is willing to pay.
 
I have not seen many offered on e-Bay (the standard measure of value these days) but $1,000 to $2,000 has been suggested. I was able to get mine in a trade that might be construed as being on the low end of that range.

IMG_0193.JPG

There were also two and six cylinder versions. McCulloch documents say the 6 cylinder turbocharged version would outperform jets at high altitudes.

Mark
 
I have not seen many offered on e-Bay (the standard measure of value these days) but $1,000 to $2,000 has been suggested. I was able to get mine in a trade that might be construed as being on the low end of that range.

View attachment 880911

There were also two and six cylinder versions. McCulloch documents say the 6 cylinder turbocharged version would outperform jets at high altitudes.

Mark
That is absolutely amazing!
 
I have not seen many offered on e-Bay (the standard measure of value these days) but $1,000 to $2,000 has been suggested. I was able to get mine in a trade that might be construed as being on the low end of that range.

View attachment 880911

There were also two and six cylinder versions. McCulloch documents say the 6 cylinder turbocharged version would outperform jets at high altitudes.

Yours looks great!!
 
Mac report from the bottom of the world

Let the fun begin:)
20210109_083318.jpg
2 hours later
20210109_101246.jpg

They all ran well. The 850 not too good chain wise I dropped the ball and forgot to drop the rakers and also forgot to put a spike on haha oops
20210109_101241.jpg
81 went awesome. Love that saw what a gem. The bar is old and warn and the chain was shifting side ways a touch and would stop cutting slightly. Not sure the proper reason it does it but had it before. A quick session on an anvil will sort it out
Got a heap of video coming

800 pulls like a train as always

My mate had his first go on a bigger mac. He runs a 390 and yeah that thing is awesome had a good blast on that today too
 
Well, I've been really busy lately which has kept me away from working on anything, but thankfully I have some free time coming again.
First thing I want to do is get my $30 SP81 rebuilt and hopefully running again. Going to order all the missing screws/bolts and a new intake boot soon.

However, on the topic of the screws, I found that I have a bit of a problem.
If anyone remembers my previous posts, you'll know that this saw had a bit of colorful history. At this point, this is the following scenario that I've worked out in my head brought the saw to where it ended up now.
1: Previous owner had the side cover off for some reason and lost the screws
2: Previous owner replaced the screws with threaded rod and nuts instead of buying proper new screws
3: Previous owner ran it like that until a nut vibrated loose, causing the threaded rod to drop downwards into the flywheel as it spun, causing various damages
4: Previous owner fixed it again with more threaded rod and nuts, somehow losing a couple bolts for the bottom shroud in the process, and ran it like that until it was last used
Or something like that lol...
Anyway, I recently took a closer look at the screw holes for the side cover, only to discover that they're all blown out. The one in these pics is the worst, which is where I think is the one that must have come loose and hit the flywheel. Looking at the positioning of it, who wants to bet that this is what also damaged the intake boot?
What should I do about this? Is there some ancient JB weld sorcery that can be applied here?
sp81_StrippedThreads1.jpg
sp81_StrippedThreads2.jpg
 
Ok so I'm not exactly a pro and far from it but for me it seems best to retap the holes bigger and in my case would be metric eg M6 that blown out 1 on top there I'd consider screwing down a plate perhaps as well as JB weld and maybe even mix in alloy swarf as reinforcement then re drill n tap.

Others will have other ideas and share fixes as well but yeah my 800 has a hand full of m6 screws in it now. The earth keeps turning lol.

30 bucks ya jammy swine :) I still grin for ya about that.
 
Trying to figure out what went awry with a chainsaw is like the FAA trying to figure out what makes a plane crash,but after working on saws for a while we can pretty much figure out what made the saw meet it's end,& what it'll take to revive it.There are some folks out there who surely don't deserve to have a wrench in their hands,let alone a chainsaw,or the worst case scenario is a combination of the 2.I'm surprised that most of them are still walking around with all of their digits still intact.I can't begin to tell you how many saws I've worked on that the PO used an inappropriate screw,bolt,or nut,or just too damn lazy to take a trip to the local hardware store.I think the one that stands out in my mind the most is when I first started working on saws about 3 yrs.ago when I found a wood screw in a muffler cap to hold it on.Of course the threads in the muffler body were totally ruined.Obviously Yankee ingenuity was not at work on that day.
 
In a similar vein, is there anything that can be squirted into the screwholes of plastic Macs to help the screw bite where a previous owner has overtightened them?

Happens to rc car bits lots. I've tried a few glues n stuff n yeah ok but trouble is it will need to come out again. 1 way that works is to heat up the screw so it melts a new thread. The right heat is tricky on small rc screws but it does work. Or a bigger screw if you can
 
Back
Top