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reversing gear rotation? |
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baitkiller 
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Joined: October-11-2011 Location: SW Florida Status: Offline Points: 1693 |
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 Topic: reversing gear rotation?Posted: March-20-2012 at 1:15am |
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I should know this...... but I'm not 100%
Standard rotation engine goes counter clockwise when looking at the flywheel. 1:1 VD 10-17-004 would turn the same direction in fwd calling for a LH propeller right? Well the BW manual for this gear says it turns clockwise? WTF? I have a RH prop. I assume (engine long gone) the OEM engine was a reveser rotation 302. 1978 SN. which would account for the RH wheel I see under the boat. So am I stupid? Crazy or drunk? I am pretty sure I'm shopping for a LH prop. But I have been wrong before. You get used to it after a while... |
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Jesus was a bare-footer.............
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baitkiller
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Joined: October-11-2011 Location: SW Florida Status: Offline Points: 1693 |
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Posted: March-20-2012 at 1:17am |
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Wait a minute. The gear doesn't care about engine rotation as long as the pump is turned correctly.
So yeah.. maybe a little tipsy... what direction does it turn? |
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Jesus was a bare-footer.............
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TRBenj
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Joined: June-29-2005 Location: NWCT Status: Offline Points: 21118 |
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Posted: March-20-2012 at 11:12am |
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You need to know which direction your engine spins. I cant figure out which it is based on your post.
The Velvet Drive can be indexed for either direction, but needs to match the engine. It cannot make a LH engine turn a RH prop. |
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baitkiller
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Posted: March-20-2012 at 9:45pm |
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Thanks TRBenj. That answers my question. I have a LH engine and so now I will need a LH prop.
Right? |
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Jesus was a bare-footer.............
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politicallycorrect
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Joined: May-19-2011 Location: vermont Status: Offline Points: 239 |
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Posted: March-20-2012 at 10:04pm |
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The rotation of the transmission is referenced looking at the the front of the tranny(why? who knows?). The engine rotation is referenced at the rear of the engine. So a standard rotation crankshaft turning counterclockwise at the rear of the engine is turning the pump clockwise on the front of transmission, turning the prop shaft counterclockwise at the rear of the boat. Its all about perspective. So a lefty motor needs a lefty prop.(all learned from the much more experienced guys than me on this site!)
Scott |
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Skin grows back...fiberglass doesn't!!
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baitkiller
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Joined: October-11-2011 Location: SW Florida Status: Offline Points: 1693 |
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Posted: March-21-2012 at 12:44am |
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Makes sense only because the pump has cute little directional arrows on the (front) indicating input rotation.
I just found a nice 13 square LH 3 blade for 50$ on the Supra site. Should be here in plenty of time. |
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Jesus was a bare-footer.............
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hotboat
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Joined: March-28-2009 Location: Conn Lake Pa Status: Offline Points: 814 |
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Posted: March-21-2012 at 9:48am |
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Am I missing something here? Two references have been made, standard rot = ccw at flywheel = lh prop
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Brian
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