What's on your bench today?

[adw]

The 3120xp now uses the K1260 crank hence the sprocket bearing lubricated from inside the engine, the early 3120 never had it.

[GardenKit]

The one way valve was added, but the orginal 268K Partner K650, and 650,550 chainsaws had nothing just a brass jet, never could really understand why it never effected the idle, as air leaks usually increase the idle speed

i guess the theory is that the air leakage through a drilling is a constant factor and can therefore be compensated for by increased fuel flow through the carb in the design stages.

 

An air leak in a non vented crank will be due to wear or fracture and the fuel supply will then be inadequate to maintain a rich mix. Adjustment of the mixture will compensate for a small air leak.

But the trouble is that the leaks just go on getting bigger and bigger until the carb runs out of adjustment.

[adw]

One theory i guess.

[spudulike]

i guess the theory is that the air leakage through a drilling is a constant factor and can therefore be compensated for by increased fuel flow through the carb in the design stages.

 

An air leak in a non vented crank will be due to wear or fracture and the fuel supply will then be inadequate to maintain a rich mix. Adjustment of the mixture will compensate for a small air leak.

But the trouble is that the leaks just go on getting bigger and bigger until the carb runs out of adjustment.

 

Pretty much what I thought, the airleak through the bearing would be restricted and constant, if the carb was set up to give a richer mix at idle and WOT, it shouldn't matter too much. It is only when air is being let in at high speed and the machine hasn't been set to accomodate it!

[spudulike]

Those that know me know that I have a 181SE ex Army green Husky in my collection. I rarely get to use it but on our "boys day out" a while ago, I gave it a good blast and it was PANTS.

 

I had mildly ported it and it really bogged - found out why today. I thought I would go back through the porting and check it out and made some significant changes. I then took the high speed restrictor out of the carb and capped it - this stops you leaning the saw out and when ported.

 

I then checked the fuel line and bingo - it was split so have one on order now - looking forward to trying it again:thumbup:

[si0797]

had my gifted sachs dolmar 143 on the bench today,carb rebuilt and started like a dream!pleased to have it up and running!

[Darrin Turnbull]

I've got a 181 xp from 1985 it still goes but i need few parts side plate , top cover and starter cover.

[Pint]

:thumbup1:A 143 you lucky bugger. Is that about 90 cc?

Would love to get my mitts on one of them

[IVECOKID]

had my gifted sachs dolmar 143 on the bench today,carb rebuilt and started like a dream!pleased to have it up and running!

 

Cracking beast of a saw , mine sounds like a Honda CR500 crosser When it starts up , will never part with it .

 

 

Ste

[spudulike]

I've got a 181 xp from 1985 it still goes but i need few parts side plate , top cover and starter cover.

 

Think most of the parts are interchangeable with the 281/288 saws - they are supposed to be damn good saws - will let you know when it is running:thumbup: