Martinm210
ArboristSite Operative
So I spent the last few hours pulling and pulling, tearing the carb back apart, putting it back together and pulling some more.
I installed a genuine Walbro kit in the carb, but all I can get is a few puffs like there's a few dribbles of gas making their way in there that immediately get burned and it never really does much. This video gives you an indication of what I'm getting.
I started with the recommended 1 turn out with the limiter caps removed, and tried everything on the Low Speed screw from .5 turns to 2.5 turns and never could get much of anything more. I also tried the high speed at different settings and still about the same.
I did find that my sealing o-rings were bad on the adjustment screws, so I took the good ones off my 066 and put them on the 044 screws. That seemed to fix the rather not so snug feeling on the adjustment screws but the problem persists.
I also tore apart the gas tank vent down to nothing so it's ok. Checked the impulse line, it's ok. Checked spark and it's ok.
When I pull the carb apart the fuel pump area seems to be full of gas, so it seems as if the fuel pump portion is working.
The only thing I didn't do is test the pop off pressure.
Anyhow, I'm at a bit of a loss, not sure what else to try but maybe soak the whole carb apart in some gas or carb cleaner and let is soak overnight followed by some high pressure air.
So if it doesn't even want to start other than a little tiny puff here and there, could it be the pop off pressure is too high?
Any pointers on what to look for?
Do you think the larger 046BB would make that much of a problem with this carb? Should I be looking at an 046 HD16 or other carb for a better fitting replacement?
Thanks!
Martin
Video of my failure...
<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/-bZeUqcMsQo&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/-bZeUqcMsQo&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
I installed a genuine Walbro kit in the carb, but all I can get is a few puffs like there's a few dribbles of gas making their way in there that immediately get burned and it never really does much. This video gives you an indication of what I'm getting.
I started with the recommended 1 turn out with the limiter caps removed, and tried everything on the Low Speed screw from .5 turns to 2.5 turns and never could get much of anything more. I also tried the high speed at different settings and still about the same.
I did find that my sealing o-rings were bad on the adjustment screws, so I took the good ones off my 066 and put them on the 044 screws. That seemed to fix the rather not so snug feeling on the adjustment screws but the problem persists.
I also tore apart the gas tank vent down to nothing so it's ok. Checked the impulse line, it's ok. Checked spark and it's ok.
When I pull the carb apart the fuel pump area seems to be full of gas, so it seems as if the fuel pump portion is working.
The only thing I didn't do is test the pop off pressure.
Anyhow, I'm at a bit of a loss, not sure what else to try but maybe soak the whole carb apart in some gas or carb cleaner and let is soak overnight followed by some high pressure air.
So if it doesn't even want to start other than a little tiny puff here and there, could it be the pop off pressure is too high?
Any pointers on what to look for?
Do you think the larger 046BB would make that much of a problem with this carb? Should I be looking at an 046 HD16 or other carb for a better fitting replacement?
Thanks!
Martin
Video of my failure...
<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/-bZeUqcMsQo&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/-bZeUqcMsQo&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>