Proper use of impact driver?? Plzzz

[imported_Samuel]

Need to do some after season maintenance on my "new 2 me" 1964 Rude LarkVI, 40HP. I dread this because since the motor is 42 yrs old, and by looking at bolts/screws etc... some of the original OEM paint is on them...I must presume that tha marina that sold it to me was not lying about it being in storage for 22 yrs...thus my question:

I have removed, cleaned and in some case rebuilt many accessories, such as the starter, alternator and carb., but now that I want to get at the impeller, the screws are harder than heck. The other parts fastners were nuts or screws with nut heads on them and a little heat and a wrench w/ wd40 worked just fine...but the screws on the leg or lower motor will not budge...

I was recommended by you fine sages in another post to use an "impact driver"... I did...

I have tried it hitting it moderately, but no go...

HOW HARD SHOULD I HIT??

Will I break the screws??

Will a propane torch be enough heat to help??

Many THx


Sam

 

[Kevin W]

Re: Proper use of impact driver?? Plzzz

I was recommended by you fine sages in another post to use an "impact driver"... I did...

I have tried it hitting it moderately, but no go...

HOW HARD SHOULD I HIT??

Will I break the screws??

Will a propane torch be enough heat to help??

Many THx


Sam

Unfortunately there is not a real good answer.

Heating and cooling along with penitrating oil will most definately help.
How hard to hit it?
It depends on the size of the screw.
Will it break?
it depends on how determined and patient you are.
Even then you still may not have good luck.
Keep in mind metal can get softer with heat.
also aluminum will expand more than steel or stainless steel with heat.
With that in mind heat it up and put the penitrant on there while hot (away from the torch).
Good luck ...you may need it.

 

[F_R]

Re: Proper use of impact driver?? Plzzz

Assuming you are talking about all those phillips head screws, go ahead and whack it, but don't murder it. The impact driver depends on being hit in order to cam the driver part. If you find out that they are corroded in, then use heat before attempting to remove them. Yes, the impact driver is capable of twisting the screws off, so just use common sense and judgement.

 

[G DANE]

Re: Proper use of impact driver?? Plzzz

Try to put a similar size screw in the bench grip and hit that with your impact wrench. You will know around how much force will break it. Then try on the motor.

 

[F_R]

Re: Proper use of impact driver?? Plzzz

Should have mentioned: The correct way to use the driver is to place the bit in the screw and attempt to turn the handle as if you are trying to take the screw out. Maintain that pressure as you give it a few raps with the hammer. Some of those drivers are better than others. I have two, one made by Snap-On and the other from Harbor Freight. The Harbor one is crap. The Snap-on is 20 times better. OK so it cost 20 times more, but it was well worth it. Also, have had the Snap-on for 50 years and it still works as good as new after 24 years of daily professional use.