afleetcommand
Pinnacle OPE Member
So this can be the JonCutter discussion, taking it off the 372 thread... LOOKS like there can be a lot of fun with these goofy things.
Here ya goThat 5800 Looks like a copy of the redmax g5000 I got. Wonder if the clutch cover would work. Not that I need one right now but maybe down the road.
Nice job Eric get yourself a degree wheel you will be glad you did.I like my joncutter. Since I have a bunch of .325 chains/bars I swapped to a 8 pin .325 rim.
I added the 372 carb, a home made intake similar to the one leafy sold me(its on my timberpro 6150) and did a little porting.
Im a hack when it comes to porting so I don't go too far, its easy to make them slower without a degree wheel.
Here's a vid, I have it turned up to 15000rpm, I tried it a little lower too but that's where its fastest.
I'v had the 62cc version. Is 48bore x34 stroke. The cylinder extension is a lil bigger than all the others cylinders. So the case is wider. The crank fits all the other cases( 45cc .52cc.58cc= the same). My favorite combo: 34 stroke crank and dual open transfer cylinder.
I copied this from the other chinese chainsaw thread as to not clutter it up with joncutter stuff.
My plan for the 58 joncutter before I even bought it was to put the shorter dual open transfer 52cc jug on the longer stroke 58 saw to gain compression, the ports are pretty much the same so it should run good.
It sounds like this guy did the same thing, has anyone else tried this swap?
Once I ran the saw and checked the compression I changed my mind, it ran good stock and had 175psi stock so it didn't need more compression and I never did the swap.
The 45cc one I had was 200psi with no base gasket, it ran as good as the 52 I turned it into when it had a stock carb. If sticking with stock carbs/intakes I recommend the 4500 joncutter, it will run good ported.
I have every cylinder they make for these saws, 43mm and 45mm dual transfer, 45.2mm quad transfer, (2 counting the one on the joncutter) the other was ported and run on my 52, I copied what I did to the timberpro grinding out the divider in the transfers tho, this didn't work good on the 32mm stroke 52cc saw, the squish was .075 and the compression was too low (120psi). I didn't run it before porting it tho so I don't know if it was a slug because I ported it wrong or from the huge squish.
The timberpro is 48mm quad transfer, when I ported it I totally ground out the dividers making it dual transfer, it gained a bit doing it too but at 61.5cc it needs bigger transfers. It looks like this cylinder would bolt right on the smaller saws but I'd have to measure it to be sure and honestly the 5800 is dam near as strong so its not really worth the cost/effort.
Anyway I haven't run this new top end in wood yet because I can seem to fuel it, just super lean in the mid range, one it gets to high rpm it's running 14kish. I'm going to leak test it before I go try and mod the clone zama.
And need to get one lol. It's pretty tempting for me to buy one.Geez, you guys are teaching a graduate course on these saws. Great info!
Some of us got some catching up to do.