Stihl 029 super to 039 conversion

[kkemp]

you can take the carb completely off and get the same as if the carb is on the idle position

Yep this one was measured with carb on and off same both times .

 

[fearofpavement]

Yeah it does.

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You've got saws, go try it and report back. About 8 pulls with throttle wide open. About 8 pulls with throttle closed, choke closed or whatever, doesn't matter. It doesn't need to pull air through the carb.

 

[a. palmer jr.]

I usually just check compression without opening throttle. They seem to read about the same. If I feel the need to check the compression it's usually low.

 

[a. palmer jr.]

You've got saws, go try it and report back. About 8 pulls with throttle wide open. About 8 pulls with throttle closed, choke closed or whatever, doesn't matter. It doesn't need to pull air through the carb.

Right. It comes in the exhaust port if the intake is closed.

 

[fearofpavement]

Right. It comes in the exhaust port if the intake is closed.

Exactly.

 

[Adirondackstihl]

Yeah it does.

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No sir, it doesn't.
Not on a 2-stroke anyway

 

[a. palmer jr.]

I bought a 390 P/C kit from machinesdoctoronline on ebay and noticed how little it takes to put the piston in the cylinder. I oiled it up like always, aligned the rings and lined the piston to the cylinder. I messed with it a little with the screwdriver to compress the ring a little but I think all I would have had to do is push it down. Maybe they've streamlined the ridges a little to enable you, like the MS250. A bit different than the first ones I did..

 

[kkemp]

Ok. It's rainy day so I'm getting some time in om this saw .I have a question . If the wires to the coil were on the wrong screw could that cause it not to run?

 

[dall]

i think as the ground is on a engine screw somewhere it should work

 

[kkemp]

Ok . I was looking at a diagram and it shows the ground wires coming from the top screw . I had them on the bottom .I was Just curious if that may have been part of my problem .

 

[fearofpavement]

No, not your problem.

The later versions had a ground screw going to the coil mount and then has another wire coming off that going to the base of the cylinder. On the Farmertec cylinders, I use a #10 screw as the original screw is too loose and a larger screw won't fit through the hole in it terminal.

 

[kkemp]

No, not your problem.

The later versions had a ground screw going to the coil mount and then has another wire coming off that going to the base of the cylinder. On the Farmertec cylinders, I use a #10 screw as the original screw is too loose and a larger screw won't fit through the hole in it terminal.

ok. I was just looking over the saw making sure nothing obvious was wrong and that caught my eye.

 

[kkemp]

Well got it all back together now. Still ain't starting . Every time I crank it sounds like it wants to start. Screws are 1 turn out fresh 40.1 mix in it. I've cranked about 50 times . Spark plug had fuel on the tip .

 

[Fruecrue]

Compression still 90?

 

[kkemp]

Nope it's at 150 now.

 

[Fruecrue]

Nope it's at 150 now.

How'd that get fixed?

 

[kkemp]

I took it apart and put cabers in . That's the only think I did different that I know of.

 

[Fruecrue]

Check your ignition coil gap, spark plug gap and also spark plug boot, those will give you a problem from time to time.

 

[kkemp]

That all seems good I put a bussiness card between that coil and flywheel . The last time I tried it backfired back out of the carb .

 

[Adirondackstihl]

You shear the flywheel key?
I'll put a few dollars on it