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Old 06-08-2004, 06:25 PM   #1
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Bent Crank

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I have an Enya 53 4C that I bent the crank on. I have a drill press and a dial indicator. Are these tools good enough to straighten this with?
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Old 06-08-2004, 06:57 PM   #2
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Not unless you are really lucky you need a lathe and two centers. Most of the bends occur at the end of the threads and the front face of the bearings. Most machine shops can straighten it but it will probably be worth more than a new motor. If you know someone who works in a shop they might do it for you.

I do know of some who have straightened them in the engine crankcase. This is risky as you may bust the casting where the front bearing is. If you decide to try this you must bolt the engine via the mounting lugs to something strong and solid. Using the prop nut and thrust washer bolt a flat bar to the engine and gently bend the nose of the crankshaft back in line checking with the dial indicator as you go.

Dennis Pratt
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Old 06-08-2004, 09:13 PM   #3
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Like Denis says, its a heck of a lot easier to get it out of the case and do it. I like to use the V blocks also, and you dont need a lathe (allthough you have to make sure the bent part isnt resting on the block as you rotate the crank)

To straighten it, I take a 1/2" diameter aluminum bar and drill a hole in the end, that slips over the threads. put the bar down untill you are just at the bend point and you can get it back in a series of small bends. Its actually quite easy to OVER bend it back, so take it easy and use the indicator often.
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