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Old 12-06-2015, 10:11 AM   #29
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I like the second photo, the first one scared me. That tiny 1/4 in shaft to remove a stuck 22mm 7/8 bolt.
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Old 12-06-2015, 10:58 AM   #30
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No, no, unless you have already chewed the s#%t out of it, don't use that. A 6 point socket looks like the bolt, 6 sites.
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Old 12-06-2015, 11:28 AM   #31
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Ok, plug head not bad yet, so I'll just use the impact drill with the 6 point socket I already have that hasn't worked with the breaker bar.
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Old 12-06-2015, 07:54 PM   #32
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Just camp on the impact drill.

Grab a pipe wrench and place it on the socket and apply GENTLE BUT CONSTANT pressure to assist the impact.

It will not move at all for some time then start to move slowly.

If yiu have an impact screwdriver it likely does not have enough power but maybe.
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Old 12-16-2015, 07:17 AM   #33
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So using the right tool for the job actually works. Borrowed a pneumatic impact gun from a friend (my electric wasn't up to the task even using a pipe wrench). One touch on the trigger dropped the plug out so fast, I had to scramble to get the bucket under the drain. Lost about a quart on the floor, but speedi-dri and a broom fixed that quickly.
Thanks to all for trying to help. I guess the old saying is true; There's no substitute for torque.
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Old 12-16-2015, 07:59 AM   #34
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So using the right tool for the job actually works. Borrowed a pneumatic impact gun from a friend (my electric wasn't up to the task even using a pipe wrench). One touch on the trigger dropped the plug out so fast, I had to scramble to get the bucket under the drain. Lost about a quart on the floor, but speedi-dri and a broom fixed that quickly.
Thanks to all for trying to help. I guess the old saying is true; There's no substitute for torque.
Oh the mental picture you left us with! If that had been me, I probably would have been directly under the generator when the bolt suddenly came out and that quart of oil would have been all over me!
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Old 12-16-2015, 08:33 AM   #35
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You know the old saying,

" Beat on anything hard enough & long enough it will move "
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Old 12-17-2015, 10:24 AM   #36
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Mine is still in place with a rounded head. I went with the Harbor Freight manual pump to suck the oil out. Add a new filter, fill it up, and it's good to go.


As others have mentioned, marine engines are usually too low to get a drain point anyway, and always use a pump for oil changes.


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Old 12-19-2015, 09:01 AM   #37
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The reason I used a breaker bar in the slot is that I had used all the suggestions above except drilling down thru the center of the plug. If I broke off the last remaining piece of the plug with the breaker bar, I still had that option and was headed there. Wise contributors on this forum advised to take each action with the thought of having another option if that one failed. I did. Did damage each try but knew what was coming next if that option failed.

I think the reason cutting the slot down to the pan worked is that it moved the point of force down to the plug which couldn't expand, unlike the head which had the ability to expand because there was nothing surrounding it. Thus most all the force I was applying was being applied to the plug body and not the head.

I acknowledge this was next to last resort, having tried everything listed above except drilling, which was next.

Happy to report I am several weeks out with a new drain "valve". No leaks and have piece of mind that next oil change will be a piece of cake. Jim
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Old 03-22-2016, 11:05 AM   #38
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Final update. Returned from winter trip of 2000+ miles with drain valve installed. Valve dry, no leaks. Actually looking forward to next oil change on Onan knowing I will not have to face the stripped bolt head this time, or ever again. Thanks again to all who contributed.
Jim
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