Alpha 1 question......

[ILMORdude]

Buddy of mine has twin engine turd with alphas and they both spin the same direction. This cant be right, can it? What does one do in this situation?

[MOBILEMERCMAN]

They are right hand rotation. There is a counter lower unit that can be used.

[PARADOX]

Some of the older boats, Including my Formula has twin with Alpha and THEY DO turn the same direction. The HP's and the speed probobly not warrant counter rotation.
There are "Alpha" models that will rotate counterclockwise.
Your friend can get an Alpha that would rotate the "opposite" direction, if it's worth it.

[MOBILEMERCMAN]

http://www.mercruiserparts.com/Show_...ER+ROTATION%29

[htrdlncn]

SEI sells new counter rotation lowers dirt cheap.
http://www.sterndrive.cc/Merchant2/m...owerSterndrive

[DAREDEVIL]

SEI sells new counter rotation lowers dirt cheap.
http://www.sterndrive.cc/Merchant2/m...owerSterndrive

, thats the way to go ...back in the days they did not have a counter rotating ALPHA I some actually had counter rotating engines.....

[phragle]

My monster majorly underbuilt supernova has same rotation alpha's... not a problem (well at least I know its not a problem up to 47.8 mph (GPS varified)

[MOBILEMERCMAN]

.back in the days they did not have a counter rotating ALPHA I some actually had counter rotating engines.....

I call BS

[DAREDEVIL]

I call BS

WHY??? I am serious, the Alpha I gen I ,came out only as RH rotation,,,it toke over 2 years to get Merc build a LH rotation lower !!!!!!!

The Gen II had no problem .

Some old Alpha I boats have counter rotating eninges because of that.

Just like old style TRS !!!!!!!

SO, no BS !!!! mmmhhhhhh

If u think ,,,explain please !!!

[MOBILEMERCMAN]

Some old Alpha I boats have counter rotating eninges because of that.

Just like old style TRS !!!!!!!

I don't believe for a second anybody ever counter rotated an engine for an Alpha or TRS.

[DAREDEVIL]

I don't believe for a second anybody ever counter rotated an engine for an Alpha or TRS.

OH, YES THEY DID !!!!!!!!!!!!!!!!

[Bad Idea Baja]

I don't believe for a second anybody ever counter rotated an engine for an Alpha or TRS.

I can't say for an Alpha or TRS, but I had a customer with a pair of Crusader 454's in a big old direct drive cruiser & one engine was a counter rotating engine.

[MOBILEMERCMAN]

Inboards commonly have left and right rotations. Stern drives are a different story. Spiral gears are designed to spin a given direction. As the spin they either try to come together or repel. They are shimmed accordingly. Straight cut gears don't care. Alphas and TRS drives have spiral gear patterns. You cannot reverse them. Then there is the water pump issue..

[US1Fountain]

The Alphas can't be reversed like a Bravo can. They'll be junk before your day on the lake is over.
Gotta go to CR lower unit.

Standard rotations use RH props.
CR use LH props

[MOBILEMERCMAN]

Bravo's are a different situation. The Standard and X's have spiral upper gears. They all have straight cut lower gears. You can spin the lower both directions. You can not spin the upper in both directions.

[DAREDEVIL]

Bravo's are a different situation. The Standard and X's have spiral upper gears. They all have straight cut lower gears. You can spin the lower both directions. You can not spin the upper in both directions.

I THINK U CAN ?? if i change rotation on a bravo, i just shift reverse !!!
SO the upper would also turn oposite ....NO ???

[MOBILEMERCMAN]

Please... All Mecruiser stern drives are left hand engines. All the uppers spin the same direction. The lower changes the rotation in Alphas, TRS,and Speedmasters. The bravo is different it shifts in the upper. The lower has straight gears and can spin both ways. The input in the upper still spins with the engine.

Some maybe all speedmasters have straight cut gears in the uppers. Some have been spun both directions. I suppose a XR could be spun both ways but, why bother.

[DAREDEVIL]

Please... All Mecruiser stern drives are left hand engines. All the uppers spin the same direction. The lower changes the rotation in Alphas, TRS,and Speedmasters. The bravo is different it shifts in the upper. The lower has straight gears and can spin both ways. The input in the upper still spins with the engine.

Some maybe all speedmasters have straight cut gears in the uppers. Some have been spun both directions. I suppose a XR could be spun both ways but, why bother.

makes sense...dont yell at me and get mad..i am learning JIm..lol

[jet]

come on guys the mercman is spot on google it................some of the BIG money guys have done counter rotation out drive motors for boat balance but production outdrive stuff is all lefty with the rotation delt with in the drive

[fixxxer22]

OH, YES THEY DID !!!!!!!!!!!!!!!!

even ford made counter-rotating engines for marine use. I had a reman 5.0 come for a mustang. i put it in and ran it and it ran like crap. after a long diag we found out that they had put a marine counter rotation cam in it at the reman shop. (it was a gopher) soo i had to put another cam in it but they did go backward as far as ford went.