Need a bit of advice on a 42cc 2150 Predator. I bought it used. It has cut a pile for me but has been a pia to start warm. Replaced all lines. Believed to be hooked up correctly from research. Primer works ok/weak on initial cold start. Farts/burbles for a second then dies starting warm? New primer also. Same problem. Maybe a failed cap vent or?
If I can remember those saws run lean out of the box . Here's a reply post from me to someone quite a while back. It pertains to a 46ccer but may work on your 42ccer.
"The first thing I did was off with those EPA limiters with a razor knife so I could adjust correctly. Those crazy things need to be turned waaay out. If I can remember right the darn thing took something like 2 1/4 turns on the high and 2 1/8 on the low for it to run right. I would go 2 out on both then keep going out a 16th until it runs right. It called for 40:1 but since I had it opened up a bit and screaming ran 32:1. "
You may have the carb with the splines and no slot. I have used a piece of fuel line pushed on to adjust the carb.
I would also give a small tweek to carb nuts in case the seal is loose and bottom nuts/ bolts that hold the clam shell together just in case it's starting to leak when hot from expanding.
If it is the cap/vent - may be vapor lock- try unscrewing the cap then try to start.
Hope this helps out some.
Mark
Plug may be bad and expanding when hot then not firing correctly.
Here's a link to a repair manual that may help- basically covers all the smaller newer Poulans.
If it has been used a lot and has been lean rings could be going. It's funny if you look at the owners manual those saws are only rated for something like 50 hours of use.
http://www.mymowerparts.com/pdf/Pou...NG-2250-2450-2550-220-221-221LE-260-260LE.pdf