Stripped spark plug hole

by Jeff Burnette in 912 / 914 Technical Questions 7 years ago

Hi. I have a stripped spark plug hole. Is that repairable? Someone must have overtightened it. It screws in all the way and will tighten to about 5 ft lbs and then stripped.

Re: Stripped spark plug hole

by Roger Lee » 7 years ago

Roger Lee

126 5.13k 4.56k

I take it we are talking about a 912 engine?
You might save it with a spark plug thread chaser. This is not your standard tap. It is meant for spark plug threads. Some have Helicoiled the hole in an experimental and this isn't recommended. The head really should be replaced. This is where the manuals help people that don't know torques. Plugs in the 912 are 177 in/lbs.

Plugs should come out and go in easily by hand. Never use a pneumatic or electric tool. If they bind stop what you are doing and use a plug thread chaser to clean up the threads. Forcing plugs in or out will trash the threads.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Report
Re: Stripped spark plug hole

by gaetan belanger » 7 years ago

gaetan belanger

0 10 0

Good day Jeff
if it does not work send me the cylinder I should be able to repair it ... casair@cooptel.qc.ca
Phil

Report

You do not have permissions to reply to this topic.

Title	Category	Replies
Spark plug thread cleaning	912 / 914 Technical Questions	1
MAGNETIC PLUG	912 / 914 Technical Questions	7
Damaging Spark-Plug Threads on Removal	912iS Technical Questions	8
912uls charge coils test for output,unplugged and cranking engine	912 / 914 Technical Questions	1
Replacing dropped spark plug	912iS Technical Questions	4

Stripped spark plug hole

Recent Videos

Safety First!

ROTALK News

Prize Giveaway!

Log In/Out

Login