alanhinsaudi Posted November 22, 2008 Share Posted November 22, 2008 I had a problem with my engine this weekend. My pre-flight check did not reveal any issues and there was no noticeable problem in the air but during the post flight check I noticed the spark plug was loose. When I tried to remove the spark plug to check it, it became very tight and it was obviously cross threaded. I know it wasn't cross threaded when I checked the plug during the last engine 5 hourly checks carried out about 31/2 hours ago and therefore the thread must have become damaged due to the plug being loose. When I eventually removed the plug the thread was completely gone and I have to get the cylinder head repaired. I'm not a two stroke expert so is this a common problem or is it a 'one off' problem. I ask the question to determine if I should buy a spare cylinder head in case it happens again. Quote Link to comment Share on other sites More sharing options...
outkast Posted November 22, 2008 Share Posted November 22, 2008 I had a problem with my engine this weekend. My pre-flight check did not reveal any issues and there was no noticeable problem in the air but during the post flight check I noticed the spark plug was loose. When I tried to remove the spark plug to check it, it became very tight and it was obviously cross threaded. I know it wasn't cross threaded when I checked the plug during the last engine 5 hourly checks carried out about 31/2 hours ago and therefore the thread must have become damaged due to the plug being loose. When I eventually removed the plug the thread was completely gone and I have to get the cylinder head repaired. I'm not a two stroke expert so is this a common problem or is it a 'one off' problem. I ask the question to determine if I should buy a spare cylinder head in case it happens again. its very rare for it to happen on any engine, fortunately its easy to get it helicoiled and being a 2 stroke you only have to remove the head, if it were a four stroke you would have to remove the valve train too. Quote Link to comment Share on other sites More sharing options...
outkast Posted November 22, 2008 Share Posted November 22, 2008 I had a problem with my engine this weekend. My pre-flight check did not reveal any issues and there was no noticeable problem in the air but during the post flight check I noticed the spark plug was loose. When I tried to remove the spark plug to check it, it became very tight and it was obviously cross threaded. I know it wasn't cross threaded when I checked the plug during the last engine 5 hourly checks carried out about 31/2 hours ago and therefore the thread must have become damaged due to the plug being loose. When I eventually removed the plug the thread was completely gone and I have to get the cylinder head repaired. I'm not a two stroke expert so is this a common problem or is it a 'one off' problem. I ask the question to determine if I should buy a spare cylinder head in case it happens again. its very rare for it to happen on any engine, fortunately its easy to get it helicoiled and being a 2 stroke you only have to remove the head, if it were a four stroke you would have to remove the valve train too. and dont forget to fit a new head gasket and torque the head bolts up correctly. Quote Link to comment Share on other sites More sharing options...
donegalwing Posted November 23, 2008 Share Posted November 23, 2008 Alan You can buy a helicoil kit cheap and do the repair yourself, its very easy to fit, you wont even need to remove the head, theres a company in the UK who manufacture helicoils and kits can be bought direct from them, pm me if you need one ... Regards Dean Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.