Originally Posted by
RocketRob
Tried to run her up but she is not drawing fuel. Compression is good everything appears sorted. I think there must be a caster clog in the needle valve. this little needle appears pressed in It is certainly not threaded. Need to think this one through. With these tiny engines it is best for me to put them down and take some time rather than plowing ahead in the heat of the battle.
Thoughts/Ideas? I might try stripping the case again and heating it up to see if I can pull the needle valve out?
RocketRob,
I'm going through the same thing as you. All my PAW engines are stuck, my Enya engines as well. My Mills, and any other engine that I ran with caster oil is gummed up.
I have used a heat gun to loosen it up then spray "Liquid Wrench"(Workhorse - Multi-Purpose Lube) to cut the caster oil.
Then I tear down the engine and place the parts into a fine screen wire basket, then the basket goes into my Ultrasonic Tank with a 10% degreaser solution. The solution is at a tempature of 130°F and the engine gets 20 minutes with the ultrasonic turned on.
When the engine comes out, it looks like it just came from the factory (brand new!)
With the "hot" water in the ultrasonic tank, the degreaser solution, and the vibrations from the sonic tank cleans out every nook and cranny a crock pot can't.
I use to use a crock pot until I messed up a motor (destroyed it). After that I purchased a Ultrasonic tank for cleaning.
I have used it for the wife's jewelry, silver, gold, copper, almost anything I can fit into the micro screen basket.
Don't put your watches into it or they won't work anymore! I have saved money by cleaning the wife's jewelry instead of her taking it to the jeweler to be cleaned.
I have a before and after of my PAW 09 from being cleaned and rebuilt with new gaskets.
So, back to you problem. Have the needle valve removed ( the part the threads in). Heat the engine up where the needle valve is mounted to the engine (make sure your wearing gloves!).
Once it is hot enough (feeling the heat through the gloves). Spray the "Liquid Wrench"(Workhorse - Multi-Purpose Lube) with the plastic "red" straw on the nozzle into the needle valve hole. Now, do the same thing on the fuel inlet side. With the heat, pressure from the lube and the lube its self,should open up the blockage. If not, the only other alternative would be to use a numbered drill and poke the number drill into the fuel inlet side to clear it. Don't use the drilling end! Use the other non-drilling side to clear the blockage.
sosam117
Mike Mac
PAW 09 - gummed up ( can't turn over) Caster oil on muffler / silencer (brass tube stuck as well). Engine not used in 8 years. (left side)
PAW 09 Cleaned up (good as new!) 20 minutes in Ultasonic with 10% degreaser solution at 130°F temp. Rebuilt with new gaskets and brass tube is removable again.