Hola everyone, sorry I haven't posted in a while(college and other things) but I have an update to tell. Turns out there were two problems that my mechanical friends(I got a hold of another one) helped me solve: The Spark Plug got fouled and surprisingly the magneto shorted out. Over the few month(es) that passed, I acquired the parts that I need: a new head(got stripped, re-threaded but leaves a slight gap), new magneto and 2 new NGK spark plugs. Hopefully today or tomorrow I can put everything together and test it out. P.S since I last posted on here, I left the gas and oil in the tank and occasionally gave it a good shake to keep it from corroding. Will there be any problems since I didn't remove the gas,oil mixture in the tank?
I'm not sure if you say you got a new head or that it is renewed by taking the stripped head plug threads and used a thread chaser or tap to clean it as best it could be.
2nd I was wondering if not really a new head per say, but the 2nd choice as per above, what is meant by a gap. I would be concerned if the threads don't torque down proper without loosening. A gap if not a leak around the plug gasket, I wonder if you mean a bit of metal remove from thread chasing and it is now the spark plug is just a bit loose till it seats down.
The Heli-Coil are definitely a bit looser as the spark plug is hand threaded in, that is OK as long as it torques down and holds. They are much less prone to cross threading, and probably since they don't fit as tight, but they are stronger metal steel (kinda spring) they are more durable.
The gaskets built into most spark plugs today are good for a few times of removal and installation, but they compress and are at a point susceptible to not sealing well at the top of the head adjacent to the threads when worn out flat sometimes. The threads themselves are really not needed to seal the gases from leaking as it is not the threads, it is the gasket job to do that.
I had a leak from a spark plug gasket and eventually found it out after it was hard starting. The loss of pressure was bad, but I also suspect on in take stroke in dusty conditions a leak at the plug can suck in dust. Best for less than 5 dollars a new spark plug if you can't take a gasket from another plug that otherwise is broken, or you can't buy the gaskets separate to seal a leak.
I've bought Heli-coil for smaller threads from a distributor that sold individual part and the exact drill bit that are not common size and was told I could create a part to install the thread repair Heli-coil and use a sharp flat blade screw driver to break off the bottom of the coil to finish the job. The professional kits are not really a likely choice unless you're in business, so I have 1/4 - 20 repairs made a couple times successfully on the cheap.
I suspect you'll have it up running soon.
MT