034 hard to start

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langdon19

langdon19

ArboristSite Member
Joined
Oct 22, 2015
Messages
58
Location
Perth
Hi all
I bought my neighbour an 034, came up for $80 so I grabbed it. PO said it’s a pain in the but to start
Gave it new plug and filter, checked the choke and fast idle and found these to be stuffed.
Fixed up the choke so it fully engages the filter. Played with the linkages and retainer clip and got full choke, fast idle, idle and stop.
Neighbour dropped it up for a sharpen today, how’s it run?
“Can be hard to start but other than that it’s great”
Just fueled it abs gave it 10-12 pulls before it popped then started, too many to me.
Am thinking that the fast idle needs bumping up?
Compression is ok to the feel, not awesome but not bad.
Jets are 1 1/4, 1 turn out
Pics are fast idle position
 

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Maintenance supervisor

Maintenance supervisor

Every 100yrs, All new people...
Joined
Feb 1, 2019
Messages
3,264
Location
South Carolina
Rodger, would it be better to pressure/vac test first?
Possibly, but most old saws need the recommended pm that is ignored by the previous owner, if you throw 30 bucks into some parts you know with confidence that there good.
Is the impulse line good? Well by the time your able to pry it free from its 20yr home to pressure test it ,it more than likely will not be. Has the plug ever been changed? You know stuff like that. Seals can be verified with some brake cleaner spraying, if you get past the elementary stuff.
 
Mad Professor
Joined
Jul 2, 2007
Messages
10,747
Location
North East USA
Is the plug wet or dry when it wont start? Wet and it's flooding, so check needle and seat in carb.

Dry, will it start with thimble of mix? If so fuel delivery problem, could be many things. Check under cover on pump side of carb. Sawdust can get in the vent hole and prevent the diaphragm from working. If you do carb get OEM full kit.

Pres/vac test will saw, will save you chasing your tail, and buying/replacing parts that are still good. Pressure testing can check carb needle, fuel line and tank vent besides engine leaks. As mentioned old lines may be brittle.
 
langdon19

langdon19

ArboristSite Member
Joined
Oct 22, 2015
Messages
58
Location
Perth
Hi guys
Can you give me pres vac tests plsn
Is it 10psi into the saw, ahould hold 45 seconds?
Is vac the same?
How do I pressure test carb, thanks
 
langdon19

langdon19

ArboristSite Member
Joined
Oct 22, 2015
Messages
58
Location
Perth
Started 3rd pull this morning, neighbour said it is often a bugger. Give it 9ish pulls then walks away, it then starts fine later on.
 
langdon19

langdon19

ArboristSite Member
Joined
Oct 22, 2015
Messages
58
Location
Perth
Carb won’t pressure test
Small plastic bit is either cracked or leaking
 

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Mad Professor
Joined
Jul 2, 2007
Messages
10,747
Location
North East USA
Fuel elbow is trashed. Find a replacement or get a new carb. These are press fit. Old one comes out with with vice-grips on the brass stud. There are plenty of threads on here about replacing these.
There is a place that sells steel replacements for those, I need to get some will try to find a link.

Quick temporary fix is superglue. But if saw still runs squirrely don't run it.
 
langdon19

langdon19

ArboristSite Member
Joined
Oct 22, 2015
Messages
58
Location
Perth
I have a mate sending an elbow, saw is currently awaiting rings and head gasket.
Holds 10 psi but tiny leaks around head.
 

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