hey folks went to change sparkplugs and right middle cylinder plug on both engines will turn 1/4 of turn and then thread lock tried turn back and forth to free up to no avail, tried spraying corrsion x in plug threads no avail. plugs our reccessed in head so can't use heat any ideas ??? I have mechanic coming in morning hoping won't have to pull heads

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I would get the engine up to operating temperature first then try to extract them. Corrosion X probably is not the best thing to use, I would use something with a bit more penetrating properties. Getting the head up to temp first may be enough.

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I tilted engines to allow corrision x to soak overnight, after searching internet found common problem with honda 225. seems like going to be screwed and have to pull heads on both motors and put heli coil in threads I am going to use some pressure with heavier ratchet in morning. I read heating block doesn't help but might try that also in morning, gojng to use anti-seize on threads from here on out thats what all reccomended just alittle late for me I think I did once but not last time

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Do you need to pull the heads to install heli-coils? They have to come out one way or the other, try to muscle them out and then assess the situation.

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thanks thats going to be my plan in the morning

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try pb blaster and some patience if you got a 1/4 turn keep working them back and forth

With aluminum heads you always have to oil, grease, never-seize etc, the plugs before you put them in. Period. Never put a spark plug in an aluminum head without some kind of oil on the threads. You can look in the 1960s owners manuals for motorcycles, outboards cars with aluminum heads, and I am sure they still tell you this even now. I am sure those heads are aluminum too, since they are Civic engines. Never, ever do that again Jamie! Electricity and different metals dont mix! Especially around salt water.

Oh yeah, and use P B Blaster, as said before Corrosion X is not a penetrant. Spray it on, start it up, let it warm up, turn it off, and try it. It should break loose. You might have to do that a few times.

okay once again I will put faith in your advice, I just went to good ole Walmart at Midnight (wow everyone should go there at midnight once/) bought can of pb blaster and going to let it soak for tonight will try in morning and update all on effects thanks for advice.
looked at other plugs that I already have out threads look dry and some have a rusty color on threads . I am diffently going to pull all newones back out and use anti seize on them never plan to be in this situation again live and learn and hopefully by me posting will save someone else the aggravation of this.

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http://aristakatcharters.yolasite.com/
Learn to hunt megs http://www.youtube.com/watch?v=HfbZU7JCEPw

I fear your threads are already toast. The moment of truth will be when you re-torque the plugs. Always use anti-sieze.

BTW, an exellent homemade penetrant is a 50/50 mix of automatic transmission fluid and acetone. Better than PB.

Thats some funny shit. I did that once and there was enormous herd of kids from the projects playing out in front of walmart in the middle of the the nite while their moms socialized inside in the ac.

Jamie, how long have these plugs been in the motor?

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Its time for a beer run.......

Wade,
I am not sure I usually replace look at replacing them at 300 hrs and I have 950 on them now so proably been a couple of years true be know. Do you think heating up the engines befoe attemping to free them will help or just makes everything hot to handle ? waiting for mechanic to get here hopefull around 9

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okay got 2 out of 3 out so far, my concern is on second one saw quite alot of alum threads in plug thread. The mechanic was hestent to mess with it because said the threads more then likely will have to pull head and put heli coils to have new threads. First plug reseated and worked in and out untill seated properly, mechanic coming down to look with scope to make sure no shavings in cyclinder, also bring Tap to help with threads. I really am trying to avoid pulling all three heads if I don't have to, used a leverage pipe to get plugs out along with pb blaster and worked plug in and out a little at a time.
any imput appreciated.

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okay had one plug that was worse then other two, retapped the trhead on this one checked all three with a cool scope that allowed us to see down in the thread and cyclinder as well. . applied never seize on all threads and on rough plugs slowly reseated plugs.

what helped was:
1. pb blaster made a major difference
2.used a old hollow long brush handle for leverage bar and worked back and forth made a major difference as well.
3. only one plug was a major concern and retapped and cleaned to make sure no shavings in head plus used scope to make sure.
4. Ran motors on hose to make sure motors sounded good and both ran great so far will see more when on water and have strain on motors.

I feel good about threads properly reseated,

hope all learn from my mistake ALWAYS USE never seize on threads and check yearly even just to re grease threads . PB Blaster rocks for stuck parts never heard of till last night

thanks for all the imput

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Glad it all worked out for you Jamie. Now go get some more teeth. All this talk made me go out and check mine for corrosion.

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Is it time yet? Tables, we don't need no stinkin tables! Dive time.

guys i build air boats for american air boats in orange Texas and i can tell you allways use never seize

I better check my honda 225 tomorrow. The plugs came out alright last year. Cross my fingers....

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you better I just took mine out and checked plus added more nver seize. I take them out every 6 months now

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Learn to hunt megs http://www.youtube.com/watch?v=HfbZU7JCEPw

never seize comes in many varieties. Its original intention was to thawrt off rust. It contains lots of diferent types of ground up metals, zinc, copper, aluminum, etc. It will not help with corrosion of dissimilar metals in salt water. they make a marine anti seize that contains no metals. it cost a little more and is a little harder to find. but it is worth it when you're dealing with costly aluminum marine parts in saltwater. I just saying.....

PB Blaster is the shit. It comes in a white can with a yellow cap and has all kinds of writing all over the can. I had to replace a steering cable recently. Soaked the cable nut overnight, loosened right up the next day. Great for trailer repair too. I swear by the stuff. G