Before you go to far with the idea of locking your gearbox and using reverse in the electric motor, find out if it is possible with your donor motor. I found out the hard way that some gear boxes, when motor direction is reversed, will not drive the prop backwards. Put the gear box in forward and see if you can turn the prop backwards without turning the motor backwards. I had a Suzuki and a Mercury that will free spin by hand backwards with the gear in forward. It has to do with the design of the clutch. I have a Johnson that will not turn in either direction when in forward without turning the motor too.
That said, ring and pinion gears, which are what is in the gear box, are typically engineered to take max stress in a single direction. It has been my experience that when driving in reverse in a car, the differential is noticeably noisier. So, IF you can run your prop backward by changing electric motor rotation direction, you should probably lock it in forward and take your chances on reverse working. It is seldom used, in most cases, anyway.
That said, ring and pinion gears, which are what is in the gear box, are typically engineered to take max stress in a single direction. It has been my experience that when driving in reverse in a car, the differential is noticeably noisier. So, IF you can run your prop backward by changing electric motor rotation direction, you should probably lock it in forward and take your chances on reverse working. It is seldom used, in most cases, anyway.
to affect the quality of the day, that is the highest of arts. ThoreauOn 09/24/2014 07:58 PM, John Acord jcacord@gmail.com [electricboats] wrote:
I am just starting my outboard conversion and, while things are apart, have a question about forward/reverse.
Is it OK to fix the lower end in one direction, forward for example, and reverse the motor for direction change?
My preference is to fix the lower end in forward and reverse with the motor direction. But I am not sure how well the lower end will hold up with that operation.
John
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Posted by: Yahzdi <yahzdi@pointroberts.net>
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