I should have left good enough alone...

I've read through most of the Evo .46 threads but I still have unanswered questions.

I have a Evo. 46 and I bolted it to a board and hooked up the tank. This is my first motor larger than a .049 and I used them 20+ years ago. I was amazed that the motor started up fairly quickly. I then proceeded to tinker with the low speed and high speed to see if they were set correctly. They actually seem to be in the ballpark of where they should be. I was able to run the motor at idle and transition to WOT with very good response (immediate).

Probably due to my lack of experience, I thought that there seemed to be a large amount of oil/fuel coming out of the muffler. I messed with the hi/lo needle setting, never removing the limiiters or by passing them.

I've had problem restarting the motor and I notice the glow driver's needle will sometimes be well into the green area and other times on the line between the red and green and then others in the red. I thought that the driver battery was dead so I charged it for the recommended 10 hrs again. I've since come to the conclusion that the driver is either not making good contact with the glow plug or the glow plug is defective.

My last problem is that now if I take the driver off the glow plug the motor will die when I reduce the throttle to approx. 1/2.

What is a good way to clean a glow plug?
Should I replace the glow plug?
Has anyone else had this kind of problem with their glow driver?

I notice that after running the motor for a few minute that the fuel line between the high speed needle and the carb was void of fuel and it was very difficult to prime the carb again. Is this due to heat from it running close by the head of the motor, I would say the spacing is about 3-5 mm? Should I put a longer fuel line between them so that it would be a little farther from the head?

If I were to take the motor apart and clean it, would WD40 be a good cleaner and then just run some after-run oil through it or automatic transmission fluid?

This is the last thing I need to get settled so I can do my maiden on a GP Rapture 40 kit I just finished. I just want to make sure this motor is running properly and consistently.
Thanks,
Mike Perik

I think you may need a new glow plug. A little fuel/oil coming out of the silencer (muffler) is okay, indicates the engine is getting lubrication. The fuel line close to the head should be no problem, the fuel moves thru to fast to be terribly effected. The problem of the prime may indicated poor tank location in relationship to the engine. The tank center line should be pretty close to the same level as crankshaft, a half inch either way is okay. If too low it will be hard to prime, if too high will run rich all the time. Another source of hard to prime is an air leak like a hole in the fuel line, check carefully, they can break at odd spots.

There have been some reports of trash in the needle valve, take it out and blow out the carburetor. Use a fuel filter, some times there is unintentional trash in the tank.

Good luck,

Chip

You really need to ask the assistance of someone who has experience with model engines. For example: if the engine cuts when the plug lead is removed it is often (but not always) due to an over rich idle setting. Also, you should not adjust the carburetor to alter the oil coming out of the engine: the oil you put in via the fuel will come out regardless of what you do to the carburetor.

WD 40 is not a good engine lubricant and I've heard it can actually damage plugs.

Ask someone knowledgable to give you a hand - don't make the mistakes yourself. It could even be dangerous.