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HELP! 372 xtorq issues

StihlEchoingHusky

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I apologize! this one is a longer read. I'm pretty frustrated with this...

I feel as for the xtorq is *s-word. Don't get me wrong when they are operating correctly they are one of my favorites. It's a love hate relationship for me. This issue has extended across 3 saws now.
the owner bought it from someone who had bought it from a dealer but never ran it. It never saw wood and sat on a bench for years. He couldn't get it to run right (idle was all over the place) and since it was waaayy past warranty he brought it to me. This was apparently after having a local shop try to get it going. I went through the saw pressure and vacum tested everything, found no leaks. Even after warming it up. still no leaks! I Went through the carburetor and everything was set at the right spot and height the diaphragm and valves were in perfect condition. Frustrated I bought a new carburetor. Going from 1st gen rwj4 to a rwj4-b. Which fixed the issue. The second one was mine. ( Not my first xtorq though this was just problem saw 2) I Was having same issue. At that time I didn't have the time to work on it. I was too busy with other people's equipment. One day A customer traded me a OE for it. (Yes I thought the same thing! Are you crazy? Lol) The OE needed new crank seals and that was it! I Love the hell out of that saw and I run it daily no issues. I've ported it as well so it's been disassembled a decent amount and then reassembled by me. The guy changed the xtorq carburetor and it ran fine.

Fast forward to problem xtorq #3. I went a different route on this one. You could technically call it a OEM "kit saw".(well should i say it's 90% OEM) This one I acquired part by part. All new OEM parts. (In the end I spent $700). There is 3 aftermarket parts in/on this saw. Which is, the 660 handle that I made fit, crank bearings and the muffler. Ive rebuilt/repaired and or in most cases ported a good amount OEs, 365 special's 371's and 372s (currently have a 371 on my bench) all have no issues. I wouldn't say I'm a pro by any means but I'm definitely not a noob with 3 series saws. When I assembled this xtorq I had a printed out service manual next to me. (I am currently teaching someone how to wrench on saws. He did a holzfforma kit saw while I did mine) Assembled the saw following the service manual.No leaks anywhere.........
I had a similar issue! The difference was Once warm it would idle all over creation... So I thought maybe the seals had a tiny leak that only exposed when hot. So i tested the case in a 5 gallon bucket of water. Nothing! even when spinning the crank. There was no shark bait who ha ha! (Bubbles🤣) I also tested the carburetor by dunking in water. Nothing! ( Metering Lever was set at the walbro W tools height.) I checked to see if there was up and down play on the crank bearings none. Fuel tank is new with new fuel line and vent. It Holds pressure not vacuum so it's not a bad tank or vent. I also tried replacing the filter!! So in my frustration I bought yet again another carburetor. Going from rwj4-b to the new rwj4-c but..... This time nothing changed! Well *s-word. I bought some nachi bearings thinking maybe the plastic cages in the OEM bearings were from a bad batch and only showed itself when hot I even got new crank seals.. I'm still having the same issue!!! this crank case is brand new. which came with the OEM nsk bearings installed. I used my oven for setting the new ones In to avoid warping the bearing pockets and crank sealing surface. Any one have ideas?
 

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Clutch side O-ring? Pressure/vac fuel line? Obstructed pulse? Bad wires? Oiler bolts? Cracked case or jug? Freeporting piston? Sticky throttle cable?

Pressure/vac doesn’t always reveal the leak. Even when you dunk it. Sometimes you have to triple check everything.
 

Duce

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I apologize! this one is a longer read. I'm pretty frustrated with this...

I feel as for the xtorq is *s-word. Don't get me wrong when they are operating correctly they are one of my favorites. It's a love hate relationship for me. This issue has extended across 3 saws now.
the owner bought it from someone who had bought it from a dealer but never ran it. It never saw wood and sat on a bench for years. He couldn't get it to run right (idle was all over the place) and since it was waaayy past warranty he brought it to me. This was apparently after having a local shop try to get it going. I went through the saw pressure and vacum tested everything, found no leaks. Even after warming it up. still no leaks! I Went through the carburetor and everything was set at the right spot and height the diaphragm and valves were in perfect condition. Frustrated I bought a new carburetor. Going from 1st gen rwj4 to a rwj4-b. Which fixed the issue. The second one was mine. ( Not my first xtorq though this was just problem saw 2) I Was having same issue. At that time I didn't have the time to work on it. I was too busy with other people's equipment. One day A customer traded me a OE for it. (Yes I thought the same thing! Are you crazy? Lol) The OE needed new crank seals and that was it! I Love the hell out of that saw and I run it daily no issues. I've ported it as well so it's been disassembled a decent amount and then reassembled by me. The guy changed the xtorq carburetor and it ran fine.

Fast forward to problem xtorq #3. I went a different route on this one. You could technically call it a OEM "kit saw".(well should i say it's 90% OEM) This one I acquired part by part. All new OEM parts. (In the end I spent $700). There is 3 aftermarket parts in/on this saw. Which is, the 660 handle that I made fit, crank bearings and the muffler. Ive rebuilt/repaired and or in most cases ported a good amount OEs, 365 special's 371's and 372s (currently have a 371 on my bench) all have no issues. I wouldn't say I'm a pro by any means but I'm definitely not a noob with 3 series saws. When I assembled this xtorq I had a printed out service manual next to me. (I am currently teaching someone how to wrench on saws. He did a holzfforma kit saw while I did mine) Assembled the saw following the service manual.No leaks anywhere.........
I had a similar issue! The difference was Once warm it would idle all over creation... So I thought maybe the seals had a tiny leak that only exposed when hot. So i tested the case in a 5 gallon bucket of water. Nothing! even when spinning the crank. There was no shark bait who ha ha! (Bubbles🤣) I also tested the carburetor by dunking in water. Nothing! ( Metering Lever was set at the walbro W tools height.) I checked to see if there was up and down play on the crank bearings none. Fuel tank is new with new fuel line and vent. It Holds pressure not vacuum so it's not a bad tank or vent. I also tried replacing the filter!! So in my frustration I bought yet again another carburetor. Going from rwj4-b to the new rwj4-c but..... This time nothing changed! Well *s-word. I bought some nachi bearings thinking maybe the plastic cages in the OEM bearings were from a bad batch and only showed itself when hot I even got new crank seals.. I'm still having the same issue!!! this crank case is brand new. which came with the OEM nsk bearings installed. I used my oven for setting the new ones In to avoid warping the bearing pockets and crank sealing surface. Any one have ideas?
Are you saying tank holds pressure? Why, that tank is open to air though vent.
 

dangerousatom

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-If you have another of the same saw start swapping parts one at a time, carb, coil, flywheel, ect until you find the culprit.

-Could be the jet has a lil bit of persistent dirt or something just inside. Give carb a long soak in an ultrasonic cleaner with the flammable type parts cleaner.

-When you pressure tested was it with the carb on the cylinder? It could be a bad spot in the boot or mating surface.

:icon_popcorn: Keep Us posted🤞
 
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