Darienne Theobald: donyboy73...i jst bought a 455 rancher in dec of 2014..it was brand new i was hired to cut 30 cords of wood nd today i was running hard all day..i stopped to sharpen chain put gas in it ..pulled the rewind it started then i gave it gas it died now no compression...what do u think happend is it worth rebuilding or jst buy new saw....i push decompression valve nd it stays in...pull rewibd 100 times nothi g idk wat to do plz help
Michal Šveda: What's the content cm3 engine ?
Ken M (jp8jeta): Don, I have the same saw, dated 1997 and the compression is 175 psi, seams pretty high considering there is some lite scoring on the piston and cylinder, your thoughts ? could you tell me the reason for holding the throttle open during the compression test ? thank you for the very informative channel.
Clifford Johnston: I bought a used and abused Husqvarna 455 Rancher for $50. Much to my surprise, the compression test indicated 150 psi. It purrs like a wildcat ;-)
dolson99: Hello I have a McCulloch Weedeater that I have not ran for a number of years. What will I have to do to get it going again? Thank- you for your time.
jwades77: my BRAND NEW Jonsered 2255 has 120psi compression. My 6yr old Makita/Dolmar DCS540 has a whopping great 155psi. I dont get it.
donyboy73: it's probably burned out, need a new top end kit, piston, cylinder and rings
George Rivera: email@example.com
George Rivera: One of the guys topped up fuel using plain gasoline on a new 45 model and it lost compression. What happened? It has 60 PSI.
donyboy73: that's awesome
7minibike2: im going to try the carb the saw is brand new i got it as a left over so maybe the gaskets dryed out.thanks for the info.mike
donyboy73: yes sometimes better to spend more money right away for an oem kit
AzFiresDan: hey there minibike, I have a husky 575xp 51 piston 72cc. 30" bar with a skip chain. everytime that I start cutting big trees and i use the dawgs the power head start bugging down... So I start with a carb re-built and a new top end.
try those, and see how it works.
AzFiresDan: just by reading other ppl test readings... its time for a true top end!!!
AzFiresDan: Hello DonyBoy, Just by watching your videos I have learn lots about chainsaws and to work on them. I did a compression test on Husqvarna 575xp Chain saw. One with the decompressor bottom in and a zip line on the trouttle it read about 60psi second was decompressor bottom out and the same with the trouttle. it read 80psi.
I buy a chinesse cylinder head kit, well the price was really nice 99.00, but it missing the vacum line port nipple. Some times be chipper it more end up more expensive...
fun1980: mine is 170 psi.
4inches4u: mine is 180 on my poulan 361.....that thing is louder than my 30-06