Spark Plug Thread Repair Kit Suggestions?

[Rivets]

Sgkent, how do you repair a stripped spark plug hole on a 2-cycle engine? Buy a short block? I’ve saved a lot of engines by installing a helicoil with no disassembly. To keep chips outside the cylinder I coat my tap with tons of grease and slowly run the tap into the hole. Don’t go too far in before backing out the tap, cleaning it, regreasing, and repeat. It may take a half dozen passes, but I don’t remember a time, but cheaper than a tear down. I always inform the customer of the odds of possible failure before attempting, but almost everyone is willing to take the chance. Only once I can remember where I failed.

 

[StarTech]

Ever heard of grease? It catches nearly all of the shavings and in the case of aluminum rubbing alcohol. Now also on two cycles you just keep the piston above the intake port and use hi pressure air to blow out the shavings thru the exhaust port. What few left are discharged as you cycle the engine with the muffler still removed. Actually if you inject air while drilling to create a back pressure can help too. Now this would require a block plate with an air injection port. Beside on four cycle small engines you could simply remove the cylinder head; unless, got a cylinder jug like Honda. Then you just treat it as a two cycle jug.

Basically there is more than one way to do things.

Matter of fact tapping aluminum is a lot easier with the alcohol then with cutting oil like Tap Magic. As usual you tap a few threads, back out, clean the tap or drill bit. Reapply the lube and repeat as often as needed.

As Rivets said 99% of the time you are successful. That one 1% is a small risk to take besides the other option would be replace the head or cylinder jug otherwise. At least you tried.