RadRacer203

From what I can see, the fuel keeps flowing when the engine is not running, and more than would be left in the diaphragm area, so what I think it's the little ball under the diaphragm sticking open. The check valve between the carb halves seems to be fine as far as I can tell. I checked it all over before reassembling the last couple times, and all seemed to be fine on the bench.

I don't think I've ever had to take that cover off before but I guess I have to now to check that and the crank seal. I think there's gas dripping out the carb because the check valve isn't sealing very well still. Are there any known problems with that? I made sure it was sealing well on the bench before I put it back on, but when I leave it sit, a puddle starts underneath it

Ok, I'll definitely check that.

Which o ring are you talking about for the "fuel intake on the induction housing"? I don't quite know where you're talking about. If the seal is bad, it's definitely on the side opposite the flywheel. The seal under the flywheel is in good shape still. I have the carb with the slot in the needle, so I had it about half a turn out. The spark plug had a little bit of oil after it popped the once but no more than I might expect. And I'm using the cj14 right now until I can get to the store to get a cj8.

Are the crank seals easy to get? Like a standard size if I have to replace them?

Crap. I think I'll try a couple more things and if it still doesn't work I'll just put it away for later. I'd like to try and gap the plug a little tighter than factory. Sounds a little like what my '37 Waterwitch outboard was doing when the plug gap was too big

Ok, I'm starting to get pretty fed up with this thing. It's got plenty of fuel, which is actually dripping out the carb. again. I cleaned the plug and it popped once but didn't catch and didn't restart. I tried a little starting fluid and it won't even give so much as a pop with that. Crank seals?

Thanks, that helps a lot. I'll clean off the plug and try again tomorrow. It's still leaking out the inlet of the carb a little bit. Any ideas? I know the check valve is working. I tested it blowing into it through a hose and no air came out do I'm not sure why it would still be leaking

Just rebuilt the carb for the 3rd time, but with new gaskets (thanks Joe!). Looks like those leaks are fixed but it's still not running. I think this time I just had the jet open too far and flooded it though so I'm hopeful. What's a good starting point to adjust the jet from? I turned it out 1.5 turns to start with when it flooded And what type of foam should I use in the air filter? I just have it off for now until I get the saw running right

I'll check the oil in the morning. I know it's not synthetic, but I don't know the details. I've been running a little on the rich side of 32:1 right now since it's what I had laying around. I filled the tank and left the gas dripping while I ate dinner and when I came back it was flowing maybe 2-3 drops per second. I think that's pretty good. These little buggers are tough to get working right.

Also, there seemed to be quite a bit of oil coming out the exhaust when I had it on its side. It's most likely just the unburned residual oil but there was a lot. I'm going to be using some Royal Purple high performance 2 stroke oil (really good stuff), but can I safely use a leaner oil mix in it so I have less unburned oil coming out the exhaust?

I just pulled the carb off again and it looks like there was a small air leak between the top and bottom of the carb, and the fuel pickup was clogged. I shot some wd-40 through because it was all I had laying around and it's flowing better. How much fuel should be flowing? I'm getting about 1 drop per second with the gas cap on. I've got some new gaskets on the way so I'll wait to put it back together till then

I didn't even think to check the fuel pickup. I guess when I pull the carb off to take out that filter I'll see if it's clogged

I'm in Shrewsbury, right next to Worcester. Upon closer inspection, the oil cap is good after a coat of super glue and a new o ring, but the gas cap is beyond saving

I checked over the carb and couldn't find anything obvious, and no air leaks. I think it's probably that little filter. It's getting fuel, just not very much.

After rebuilding the carb and cleaning everything out, it runs, but not well. What's a good starting point to set the jet at? I had it about 1.5 turns out and it seemed to run the same no matter where I put it. I think I'll take the carb off one more time and pull that little filter. I had cleaned it out but I suspect it's just not letting any fuel through.

Ok, I'll keep that in mind. It just seemed like there was more than there should have been coming out.

It's leaking out of the tube itself, not from the seam of the vent pipe. I assumed a little bit would be normal but it seems like more than should be normal is coming out. David, would you happen to have a full scan of the service manual? I think that would come in very handy. And I posted with photobucket because the max size on this website is less than 1mb. My pictures tend to be around 4 or 5 mb.

I made sure the tank seal was intact as soon as I got it, and it seems fine. The gas cap is definitely leaky, and that's the main culprit, but there's definitely some fuel seeping out of the vent.

I'll try all of those things out. I just completely stripped and cleaned the carb. There was a little dust but not too much. The first thing I did when I was swapping the diaphragm was to check the ball valve, and everything seemed ok there. I've got the cj14 plug in it now so I'll switch that out. And i'm definitely going to need a new gas and oil cap. Does anyone reproduce these? Mine are both full of hairline cracks.

Yeah, I sort of suspected it might be something to do with the carb. It's really a pain to get it off and back on

Here's a picture of what I think is a vent of some kind. I decided to rob the diaphragm off my running Tiny Tiger generator so that's basically new. I'm pretty certain it's not the crank seals since I didn't feel any play when I had the flywheel off, and even though it was dirty and oily, there was hardly any oil behind the flywheel. Sorry about the bad quality of the picture, but what I was talking about is the little fitting that looks just like the fuel pickup but to the right and down from the fuel pickup

I picked up a pretty nice original Orline Mustang saw yesterday but I'm having a bit of a problem getting it running. It's got good compression, really good spark, and it's getting gas but it won't stay running. When I prime it with the button, it'll run for a couple seconds and die. I replaced the spark plug with a new CJ14 (gapped to .030) and the carb diaphragm. It's also leaking some gas out the bottom through what looks like a vent next to the fuel pickup. Should there be a hose coming off of that? Hopefully this picture works...

The original gasket was in sad shape, so I tried to replace it with some material I had lying around, but it hasn't worked. I'm wondering what material to make the gasket from

Thanks Wallfish, but Webhead had me covered. I just got the flywheel in today and it runs great! The last problem with it is a very leaky gas cap. Is there any remedy for that?