Chris-PA
Where the Wild Things Are
I use two strands of the thinner stuff twisted together - it's a bit softer that way.
Re-assembly of Husqvarna 50 (51/55) need timing and muff mod advice
- Thread starter thefarmboy21
- Start date
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sweidish445
ArboristSite Member
Glad you questioned me.. i just remeasured squish with two thin strands, as well as with the thick stuff again. While both read the same, i came up with .029 at pistons edge this time.
About 1/8" from the edge is measuring the .035 i came up with earlier. I see your point though! I did a 350-346 conversion and it was so difficult to compress the thicker solder i went and got the thin stuff.
birdcolonel
Rusty Cutter
Unless I'm missing something, on your exhaust number, 150 degrees is closed.
sweidish445
ArboristSite Member
My initial exhaust open/close was around 110°. I heightened the exhaust a little so that number is a few degrees different now.. just need to heighten transfers a bit and ill be in business!
sweidish445
ArboristSite Member
One year later, and this saw is finally running. From what I know, it sat dead for over 3 years. I ended up with the moderately ported closed port jug, Lil red barn piston, no base gasket, and mm. Over the last year I've picked away at this build little by little between a million other projects. I ground down carb shafts and screws, matched all transitions and gaskets from air filter to the muffler. Also ground case at the transfers to match the wider transfers on the jug. The stock bucking spike had me feeling bland also so I modified a 372 dog and made another chain catch like the one I built for my 372 with dual spikes.
Today I decided to advance timing at the flywheel also. Tuned pretty rich but it made about a dozen cookies so far and it's running awesome!
I picked up a few different rims to play with. I started with the .325 7 pin. Have a .325 8pin as well as a 3/8 8 pin. I intend to grab a 3/8 7pin however as I feel this may be the best setup.
I'm just glad I can start looking at another project without feeling guilty that this one isn't finished!
Today I decided to advance timing at the flywheel also. Tuned pretty rich but it made about a dozen cookies so far and it's running awesome!
I picked up a few different rims to play with. I started with the .325 7 pin. Have a .325 8pin as well as a 3/8 8 pin. I intend to grab a 3/8 7pin however as I feel this may be the best setup.
I'm just glad I can start looking at another project without feeling guilty that this one isn't finished!
thefarmboy21
ArboristSite Operative
Let me know what rim/chain combo works out best.
I need to order the rest of the parts for my 55. How many degrees did you advance your timing?
I need to order the rest of the parts for my 55. How many degrees did you advance your timing?
sweidish445
ArboristSite Member
At flywheel I filed about 1/4 width of key. Used piston stop and marked flywheel. Filed till I had about 5mm advance at flywheels edge. I believe ex. Was raised almost 8° transfers 2° and intake lowered 5°. These weren't the exact numbers I was aiming for since I used a different piston than originally planned.
Ive run a 55 rancher which comes with the 3/8 7pin rim stock. Without porting or m.m. it cut very well. I don't intend on this saw being my goto saw, which is why I want to experiment. I just want a quick cutter, no work horse.. with my saw and the .325 7pin, 18" semi chisel, the saw wont bog, runs strong as an ox in the cut. For the record, cutting rock hard seasoned oak. I'll let you know what I come up with and hopefully get some video..
Ive run a 55 rancher which comes with the 3/8 7pin rim stock. Without porting or m.m. it cut very well. I don't intend on this saw being my goto saw, which is why I want to experiment. I just want a quick cutter, no work horse.. with my saw and the .325 7pin, 18" semi chisel, the saw wont bog, runs strong as an ox in the cut. For the record, cutting rock hard seasoned oak. I'll let you know what I come up with and hopefully get some video..
thefarmboy21
ArboristSite Operative
Mine is just a 55 Rancher (built a 50 a year or two ago) I have the numbers written down somewhere, but I did some mild work to it. It was originally the 3/8 7-pin. The 50 was .325 chain 7-pin I believe. I just want this one to cut really fast, it won't be a felling saw most likely. If I keep it, it'll just be to toy with, shownoff to my buddies and cut campfire wood. Either gonna build a gnarly modded muffler for it, or try my hand a building a pipe.
sweidish445
ArboristSite Member
18" .325 7pin rim
sweidish445
ArboristSite Member
8pin rim... not much different?
sweidish445
ArboristSite Member
I threw on a 3/8 7pin rim, and a 16" 3/8 LP oregon chain a few nights ago and I'd say it cuts best with this setup.. need to get me a 3/8 8pin and probably a 60dl chain. The 59dl just barely fit.. I did get a video, but my ass is in the way the whole time. I'll spare you guys..
thefarmboy21
ArboristSite Operative
But would you expect that since it cuts better with 16" 3/8 than an 18" .325, that it would likely cut the fastest with 16" .325?
thefarmboy21
ArboristSite Operative
Does that thing have much of a muff mod? Sounds quiet. Definitely idling on the fast side....im a hot rodder, so I like them to idle as low as possible lol.
sweidish445
ArboristSite Member
I was going to inquire about that. It's idling low as possible at idle screw. Can't I make a lil dimple or notch in the carb venturi to richen mix of idle? How do we fix this? I don't mind where it's idling so much, but would like it a tad slower.. the muffler I just removed the inner baffle and open the exit port. Didn't modify deflector tho, so it's nothing wild. I matched everything from carb to muffler and even ground my carb screws and shafts down a bit. Spools up strong!
sweidish445
ArboristSite Member
Wait, that made no sense. Lol
motor head
Addicted to ArboristSite
Has any one tried a non windowed piston in these semi closed port cylinders?
sweidish445
ArboristSite Member
I used the jonsered 590 630 piston from lil red barn I think.. had windows..
