044 re-build

[Greg]

The rubber Carb to Cylndr boot on my 044 somehow got torn and a mixture of dirt and too much air screwed up my cylinder and piston. I ordered a new boot, and the cyl kit from Baileys. What is the best way to clean out the bottom half of the cyl to get all of the dirt out?? Any other tips or things to be aware of when putting this back together. I did this a few years ago on an old Poulan, but it has been a while since I have tried to be a saw tech...
Should I use loctite on the screws?
Greg

 

[stihltech]

044

Do the bearings feel smooth? I have had god luck with WD40. Fill the cranckcase and turn the crank quite a few times. Dump it out. Do the bearings have a shield on the inside? That will make it tougher, you will have to remove the crank seals to get it out. Replace the seal under the flywheel regardless.
Loctite the muffler and cylinder screws, also the hand guard screw on the recoil.
Make sure the pulse hose is good and fits tight on the carb pump nipple. REPLACE the top rod bearing.

 

[rahtreelimbs]

stihltech ???

Can bad AV mounts cause the carb-to-cylinder boot to tear? I'm thinking to much play in the AV mount could cause the boot to be pulled past it's limit. Rich.

 

[stihltech]

AV

You bet. Check em all and replace any or all ripped or weak mounts.

 

[TheTreeSpyder]

Typically on Anti-Vibration units this can occur. The carb is isolated on your side of the system from the banging of the cylinder on the other side.

There is usually a short, flexible piece of rubber. So, if the shox are wore out it can tear this junction, or ifa stick pokes thru it etc. If you get a hole here it can fry the saw by throwing to much straight air in the carbureated mix. Even had a stick get an 020 like that, made a hole in that hose after the carbureator mixed it and it sucked too much air into the cylinder.

An 019 has hard, thin plastic for this 'boot' to travel from the carb to the cylinder, plus a longer travel; helping to make this model quirky. i think that the plastic used for this travel helps make the saw problematic by a) being so long b)having diffrent thermal insulating properties thatn the usual soft rubber.

 

[Gypo Logger]

Hi there, I have seen saw operators use the space between the airbox cover and top cover to put their barwrench and file when the saws not in use. This eventually creates a hole in the boot.
John

 

[Greg]

Thanks for all the feedback, the boot is not in too bad of shape, I don't know how it got this rip in it I don't think it was a stick, I'll check the AV mounts.
A buddy of mine was looking it over and he thinks that becasue the rings are not damaged, and the scaring in the cyl and piston is fairly light that I could just sand it really good with some fine grit to get all the scaring off and I'll be ok with just a new boot. The whole top half is kind of grey-white color on the outside due to the heat.
Greg

 

[rahtreelimbs]

If you have the top-end off throw some new rings in it anyhow. Rich.