Engine Rotasion Or Gearbox Rotasion?
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Engine Rotasion Or Gearbox Rotasion?
Hi Chaps as some of you know im restoring a 1989 Baja force 280 with twin 454 magums with alpha one drives, do the motors turn the same way and the drives turn clockwise / counter clockwise ????? cus im sure some one told the engines can rotate ether way just a bit confused about can someone please answer this for me.
cheer max p
cheer max p
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It's determined by the lower on the Alphas. Sometimes you do find boats with two RH or LH drives and a reversed engine. But the normal way to do counter rotation on an Alpha setup is in the lower units. Also, a counter rotating engine is not just an engine with the rotation reversed. You need to build the engine right to do this. Cam, pistons, rods ect. is different.
Good luck with it.
Good luck with it.
Last edited by A.O. Razor; 10-05-2011 at 12:02 PM.
#3
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Also,,,,some of the old Bajas came with same direction Alphas.....so both props are the same
But normal for you should be motors same direction,,,,counter alphas if your redoing the boat
But normal for you should be motors same direction,,,,counter alphas if your redoing the boat
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#4
You Alphas came with clockwise rotation in 89. Like everyone else has mentioned, to change the rotation of the drive, you will need to purchase an Alpha with counterclockwise rotation if you want the propellers to spin opposite one another.
Alpha drives cannot be ran in reverse like a Bravo so don't make that mistake!
Alpha drives cannot be ran in reverse like a Bravo so don't make that mistake!
#5
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The engines have to rotate CCW, the drives wont work
turning CW. ( clutch's wont lock up)
turning CW. ( clutch's wont lock up)
#6
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You Alphas came with clockwise rotation in 89. Like everyone else has mentioned, to change the rotation of the drive, you will need to purchase an Alpha with counterclockwise rotation if you want the propellers to spin opposite one another.
Alpha drives cannot be ran in reverse like a Bravo so don't make that mistake!
Alpha drives cannot be ran in reverse like a Bravo so don't make that mistake!
Here are some Mercury part numbers, and a site you can purchase both drives in all the gear ratios.
http://www.sterndrives.com/mercruisersterndrives.html
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