grrr. 2 stroke question

[TrailerRider]

we have a 87 polaris trail boss that used to use to have oil injection. It has ran fine by just premixing. Top end was rebuilt, gaskets, rings, intake o-ring, rings. Also replace spark plug, cleaned carb.

I have spark, compression and fuel. But the son of B**** will not start. It seems to be dumoing fuel in the exhaust pipe. After a few pulls the pipe is literally drippig with fuel. If I pull the pipe off I can actually dump some fuel out. I took the carb apart and cleaned it all up. All the ports in the carb are free and clear. Spraying carb cleaner in ports shoots nicley out. The float seems to be working. The needle has no restriction when moving. The needle on the throttle is clean and does not stick. Also looking at the motor I cannot find the reed valve??? Is there one for a oil injection? I looked through the intake and there is no restrictions. Took compression test and it is about 110 to 115. Manual calls for 115 I believe. I have no leaks from top or bottom. The fuel cutoff switch works. I can remove fuel line and it will dump fuel out constantly and closing it stops fuel.

What am I missing here??? :mad: :mad:

Oh I had the barrel honed. Has not been bored over. It is at stock 72mm.

[ccdhowell]

Is the seat stopping the fuel flow from the tank when the bowl fills up? Are the floats adjusted properly? I'm not familiar with that engine; don't know about the reed valve. You might send a PM to jesweihart (probably spelled wrong, but close enough to find in member list). His name is John, he has a Polaris 3wheeler and may be able to help.

Chris

[MIK6]

2 of the 3 scramblers at TF07 had the same problem, its happened to my P3 a few different times as well. You either have the floats set wrong of your needle and seat is warn / clogged. You have gas in your base, filled up around the crank / rod, fluid-locked. If you look at the under side of your motor you can see a small drain plug, its pretty obvious what it is once you look for it. pull it and drain your base. I showed it to jswinehart at TF07, drained his and he was back up and running.
Howdy or jswinhart might have a blowup picture to show you better.

GOOD LUCK
MIK6 / Mike

[TrailerRider]

I was curious if that was the problem with float. I will drain the motor and see what I come up with. Also do I need to fill it with anything after draining? This is my first time working on a 2stroke. Also this motor does not have reed valves on it. It goes like this: Air box -> Carb -> Intake tube -> Barrel. There is no physcial place to have reeds on the motor. I spent the better part of 2 days trying to find it on bike and online. Thanks again this gives me somwhere to start again. Actually 2 more questions and this is going to sound stupid but once the motor is drained When I go to try and start it should I give it throttle or no? I guess what is best starting procedure after dumping the motor?

[Ryan.]

all 2 strokes should have reeds...

[lndy650]

it dosent have reeds its a piston port engine

[TrailerRider]

Ok this is really starting to piss me off. I found the drain plug. Thanks Mik6. Ok so it drained for a few seconds roughly maybe 3 seconds of full stream. Put plug back in and took spark plug out and pour a very little bit of fuel straight in. Yanked and nothing. Not even trying!! So if I have fuel compression and spark and nothing then maybe my spark is not enough to igniite the fuel? mixing @ 40:1(per the manual.) I took some video with my cell to show how the spark looks. Is that to weak of spark?

http://www.youtube.com/watch?v=1P0oIs385zs