Re: stripped spark plug thread

[Don]

quote OLCAH:

Fleetwin, If I change the head now would I have to disturb the head/head gasket later when I replace the print at the bearing? Looks like I would not have to per t2stroke . I replaced the upper carbon seal this winter with a new carbon and replaced the inner ring with the square type as recommended by Frank. After using it a few times I found fuel leaking in the seal area and running down on to the motor. So a couple of weeks ago I pulled the seal apart again and put in the factory recommended oring. I ran the motor (skipping) for a few minutes and oil was in the seal area with that also. Maybe the O ring around the bearing is bad.
I have an Rd15A with the same problem.

Frank accurately points out that this engine might not even have an oring around the bearing. So, I would definitely look closely at the correct parts book before ripping the crankcase apart needlessly. Follow Frank’s instructions about making sure the vacuum port is clean/operable, or else the fuel/oil that is drawn up to lube the bearing will just puddle there.
And again, not quite sure just what you are asking me so let me know if I miss the boat here. I think you are asking if the cylinder head must be removed in order to split the crankcase, correct? The powerhead must be removed from the exhaust housing, BUT the cylinder head does NOT need to be removed in order to split the crankcase halves.
Again, please look into this much further by using the correct parts book/asking questions before splitting the crankcase needlessly. I don’t have access to the parts book for that engine. Are you sure you installed the carbon seal correctly?