Poulan 42cc Conversion
 

i have a poulan 42cc it is hard to get started it has ch Ignition i have to start it with a drill and then it will dead stick can some one tell me what i need to check this is the 2nd Ignition it has a walbro 201 carb on it i am useing a 1100mh 4.8v battery how do i need to adj the high snd low needles i got the kit form Brillelli Machining with the carb thanks for any help clayton

RE: Poulan 42cc Conversion
 

I did few of those some years back. The one I kept for my son ran well but was a little harder to hand start than any of the Echos whicj I prefer. Compression is the culprit. Otherwise a decent engine. Where are your needles at? You may be a little lean based on what you describe. The carb is fine for the engine, I use it on any 40 to 50cc engine I do. I did tap my engines as I recall for external pulse for what it is worth.

RE: Poulan 42cc Conversion
 

needles are at 1 1/2 on both

RE: Poulan 42cc Conversion
 

OK lets start at the beginning. Check the timing and make sure it is at 28 to 30 degrees BTDC. Open the needles to about two turns out and start again. This is rich but it will run. You said it goes dead stick in the air, what are you doing when that happens? You want the low set so it will transition from idle in a smooth curve with no hesitation as you increase throttle. To get this you will lean the low until you can't transition then fatten it up a tad. Set the high end for max RPM and richen it up a bit. Remember that as you adjust the needles you should only make very fine adjustments, like a screw drivers blade width. Also when you adjust the low it does have some effect on the high end but not vice-versa. This exlpanation is very basic for any gas engine but will get you started.

RE: Poulan 42cc Conversion
 

level flying it will die

RE: Poulan 42cc Conversion
 

what is the compression on the poulan 42cc mine is about 35-40 thanks

RE: Poulan 42cc Conversion
 

Your rings are bad...

AV8TOR

RE: Poulan 42cc Conversion
 

How long have you had this Poulan? Did you get it from Brillielli? Or did you just get carb or ignition from Brillelli. Was this engine ever broke in...or is it quite new? Also make sure there is some oil residue around rings for a compression seal. Also the throttle should be blocked open to allow for a full charge of air when checking compression. Hope his helps. Capt,n

RE: Poulan 42cc Conversion
 

just get carb or ignition from Brillelli i put a new cyl and piston and rings it has had less then a gallon of fuel in it

RE: Poulan 42cc Conversion
 

It sounds like you got a engine that needs break-in or ring may not be installed right? you should not need new piston ring already. Did you measure ring end gap with just the ring in the sleeve? Gap should be very small. Can you tell us more. Capt,n

RE: Poulan 42cc Conversion
 

what do i need to do to break-in when i put new rings in it thanks

RE: Poulan 42cc Conversion
 

Run it a tad rich then fly it. Running the engine in the air is the best break-in procedure there is. Running it a little rich will help keep it cool and lubricate the cylinder. I run Lawnboy oil for break-in and run all my oil ratios 50:1 break-in oil or not.

RE: Poulan 42cc Conversion
 

end gap is .029 i got a new one it is .025 with new cyl.

RE: Poulan 42cc Conversion
 

Are you sure of those measurments?? The ring gap should be around .003" optimally. It would be best to get a ring from Frank Bowman...

AV8TOR

RE: Poulan 42cc Conversion
 

yes i am sure measured it at top and bottom i what is franks e-mail

RE: Poulan 42cc Conversion
 

i got a ring form frank bowman and it fix the eng runs good thanks for all the help