Engine Direction
08-22-2003 | 01:37 PM
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From: Holden, MA
Engine Direction
I don't want to sound too stupid, but do all engines run counterclock wise or clockwise ? I have a .65 K & B Sportster 2-stroke and a OS-FS-70-4-stroke. It might make it easier to start if I was turning it with the starter in the right direction. Thanks, Carl.
08-22-2003 | 07:45 PM
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From: Mary Esther, Florida, FL
Engine Direction
Rog:
This is true only with a reed valve engine.
Unless parts are changed or rearranged the intake port timing will either prevent running in reverse, or the engine will not run well backwards.
Many makes have reversed port cranks available.
And with engines that have a separate front cover, the rotation can be reversed by unfastening the front housing and turning it 90 degrees.
Bill.
...but most will run both ways too...
Unless parts are changed or rearranged the intake port timing will either prevent running in reverse, or the engine will not run well backwards.
Many makes have reversed port cranks available.
And with engines that have a separate front cover, the rotation can be reversed by unfastening the front housing and turning it 90 degrees.
Bill.
08-22-2003 | 10:29 PM
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Engine Direction
As already stated, most engines run counter-clockwise (as viewed from the front), but there are a lot that can run the opposite way. Most people who have flip started a 4-stroke find this out quickly. If you have a clock-wise engine, the manufacturer will make a bold statement as to that fact in their instructions (ie: some marine outboards). Just because an engine will run in either direction does not mean it will run well in both directions. Porting and timing are designed for one direction only.
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