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I did some searching last week on the matter and thought I'd found the answers, but now I'm not so certain.
Have a well-used 390xp. Took it out of its box a couple weeks ago and noticed the decomp valve was hissing when pushed in and pulling on the starter rope. It's been almost two years since I've run the saw and didn't recall the hissing.
My searches led me to order a new, OEM decomp. I installed it the other day at lunch. The valve stem seemed tighter. It also hisses when decomp is pushed in. Some posts said this will happen, some say faulty decomp, etc.
Saw has stout compression with decomp released and is tough to pull over. No hissing when trying this. Still passes the drop test, but I haven't thrown a tester on it for numbers.
So, my question is: Is the decomp supposed to release a little air when pulling over with it pushed in? Is this hissing normal?
I asked my crewboss to check his 288/394 if he gets a chance. He said he thought he remembered his hissing, but couldn't recall for sure.
Unless faulty, I'll keep the new decomp installed and see if I can't find a way to deep clean the old one to keep as a backup.
Thanks for any input.
Have a well-used 390xp. Took it out of its box a couple weeks ago and noticed the decomp valve was hissing when pushed in and pulling on the starter rope. It's been almost two years since I've run the saw and didn't recall the hissing.
My searches led me to order a new, OEM decomp. I installed it the other day at lunch. The valve stem seemed tighter. It also hisses when decomp is pushed in. Some posts said this will happen, some say faulty decomp, etc.
Saw has stout compression with decomp released and is tough to pull over. No hissing when trying this. Still passes the drop test, but I haven't thrown a tester on it for numbers.
So, my question is: Is the decomp supposed to release a little air when pulling over with it pushed in? Is this hissing normal?
I asked my crewboss to check his 288/394 if he gets a chance. He said he thought he remembered his hissing, but couldn't recall for sure.
Unless faulty, I'll keep the new decomp installed and see if I can't find a way to deep clean the old one to keep as a backup.
Thanks for any input.