OK, did some searching here for "orange umbrella". Think I know what you are talking about now: part #1110 353 1600, right? Do I need anything else to retrofit this to an 084?
084 Cylinder kit FAIL
- Thread starter torch
- Start date
Help Support Arborist Forum:
OK, did some searching here for "orange umbrella". Think I know what you are talking about now: part #1110 353 1600, right? Do I need anything else to retrofit this to an 084?
Still trying to figure this out. Do I need
1121 358 1800 (vent filter)
1121 358 2500 (tank vent cover)
WidowMaker_1
_____________
- Joined
- Apr 18, 2014
- Messages
- 1,425
- Reaction score
- 3,814
Just check to see if you have the little hole in the tank that accepts that rubber valve. It has a *** that pulls through and snaps into place.
Darn, if I understand it correctly, then I'm not sure that's going to work on this saw. It's more of a slit, although with a tiny round hole at the centre of the slit, and it's pretty close to the tank wall. Or is this umbrella much smaller diameter than I'm imagining?:
The disc goes on the inside of the tank. Pull the *** up through the outside. Just don't pull it off!
srcarr52
We can't stop here, this is bat country.
FYI, that is the same umbrella valve that is in a Holley accelerator pump.
And a VW T25 pierburg carb!
Ok: Checked all the bearings. Flushed out the crankcase with mixed fuel. New seals. Got another cylinder kit. Went over all edges to make sure they were properly chamfered. Set the squish to 0.027" using the soft solder method of measuring. Washed the cylinder and piston, lightly oiled with 2 stroke oil, installed the rings and assembled. Checked compression: 130 psi cold. Drained the fuel tank, installed the orange umbrella and removed the grub screw. Added another 100ml of oil to the fuel can. Mixed well, and refueled the saw.
Fired the saw up. Idles nice. Set the high speed for a strong 4-stroking when blipped. With the saw warmed up, took a slice out of a 2' diameter maple stump, moderate pressure, varying throttle from 1/2 to full -- still 4 stroking in the cut. Let the saw idle a bit, leaned out the high speed screw 1/8 turn. Still 4 stroking when blipped. Cut a second slice out of the stump. Checked the idle return in all positions and shut down the saw.
Started a hot compression check. 1st pull ~90 psi. Second pull, rising through 120. Suddenly pressure gauge dropped to about 5psi and the saw jammed. Removed the compression gauge and the piston was around TDC. Pushed back down quite easily, but jammed at TDC immediately on pulling the recoil again. WTF???
I removed the exhaust, looked inside, and found this little fellow sitting on top of my piston:
Brass coloured, non-magnetic, scores easily with a fine file, looks like brass. Where the heck did this come from and how the aitch-ee_double_hockey_sticks did it get inside my bloody engine???
I took this pic and stared at it scratching my head. Not a bearing, Doesn't look like a carb part, although it seems to be brass and vaguely looks like a float valve needle.
Wait a sec -- valve needle? Why would the pressure gauge drop before pushing the pressure release button? So I checked, and sure enough, the OTHER HALF OF THIS BUGGER IS STILL INSIDE MY CHEAP $#!+ HARBOR FREIGHT COMPRESSION TESTER HOSE!
Arrrggghhh.
So, what do all you guys use for a compression tester. 'Cause apparently I'm now in the market for a new one...
Fired the saw up. Idles nice. Set the high speed for a strong 4-stroking when blipped. With the saw warmed up, took a slice out of a 2' diameter maple stump, moderate pressure, varying throttle from 1/2 to full -- still 4 stroking in the cut. Let the saw idle a bit, leaned out the high speed screw 1/8 turn. Still 4 stroking when blipped. Cut a second slice out of the stump. Checked the idle return in all positions and shut down the saw.
Started a hot compression check. 1st pull ~90 psi. Second pull, rising through 120. Suddenly pressure gauge dropped to about 5psi and the saw jammed. Removed the compression gauge and the piston was around TDC. Pushed back down quite easily, but jammed at TDC immediately on pulling the recoil again. WTF???
I removed the exhaust, looked inside, and found this little fellow sitting on top of my piston:
Brass coloured, non-magnetic, scores easily with a fine file, looks like brass. Where the heck did this come from and how the aitch-ee_double_hockey_sticks did it get inside my bloody engine???
I took this pic and stared at it scratching my head. Not a bearing, Doesn't look like a carb part, although it seems to be brass and vaguely looks like a float valve needle.
Wait a sec -- valve needle? Why would the pressure gauge drop before pushing the pressure release button? So I checked, and sure enough, the OTHER HALF OF THIS BUGGER IS STILL INSIDE MY CHEAP $#!+ HARBOR FREIGHT COMPRESSION TESTER HOSE!
Arrrggghhh.
So, what do all you guys use for a compression tester. 'Cause apparently I'm now in the market for a new one...
Brent Nowell
Addicted to ArboristSite
Could that be from a loose piston ring pin?
*edit*
Too late to the party! Unreal that a compression gauge check valve tried your engine!!
*edit*
Too late to the party! Unreal that a compression gauge check valve tried your engine!!
drf255
BAD CAD
Luckily you caught that before running saw and ruining another jug.
I use OTC brand tester. Apparently they make the coveted Snap-On tester. I’ve had no issues with it.
I use OTC brand tester. Apparently they make the coveted Snap-On tester. I’ve had no issues with it.
I can't be certain that it was part of the compression tester that damaged the first cylinder kit. But it seems to be a strong possibility.
My old Canadian Tire automotive compression tester is reading 140psi (cold, without any additional oil). I don't trust the accuracy of that gauge, but it's a good sign. And I can pick the saw up with the recoil handle. Now I need to go find some big trees to cut and finish the break-in process.
Update: Ran 3-1/2 tanks of fuel through the saw over the last 2 days, starting with some 2' diameter birch and ending up finishing off the 4' maple stump that started this whole thing. It's pulling strong, very responsive, runs well in any position.The CTC compression gauge is showing just over 140psi.
One more question: What plug should I be running in this saw? I had a Bosch WSR6 in there, which is what the IPL I have calls for. The dealer looked it up in his system and gave me an SR10 -- a full 4 steps hotter. The plug is nice and clean, and I don't see any erosion of the electrodes yet (after only 2 tanks of fuel), but I am still at the rich end of the spectrum and running 40:1.
One more question: What plug should I be running in this saw? I had a Bosch WSR6 in there, which is what the IPL I have calls for. The dealer looked it up in his system and gave me an SR10 -- a full 4 steps hotter. The plug is nice and clean, and I don't see any erosion of the electrodes yet (after only 2 tanks of fuel), but I am still at the rich end of the spectrum and running 40:1.
Similar threads
