Headlines
Alpha 1 question......
- Thread starter ILMORdude
- Start date
MOBILEMERCMAN
Founding Member / Competitor
They are right hand rotation. There is a counter lower unit that can be used.
PARADOX
Founding Member
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.
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
Founding Member / Competitor
htrdlncn
New member
SEI sells new counter rotation lowers dirt cheap.
http://www.sterndrive.cc/Merchant2/...&Category_Code=MercruiserAlphaLowerSterndrive
http://www.sterndrive.cc/Merchant2/...&Category_Code=MercruiserAlphaLowerSterndrive
DAREDEVIL
Banned
:iagree: , thats the way to go ...back in the days they did not have a counter rotating ALPHA I some actually had counter rotating engines.....
MOBILEMERCMAN
Founding Member / Competitor
.back in the days they did not have a counter rotating ALPHA I some actually had counter rotating engines.....
I call BS
DAREDEVIL
Banned
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
Founding Member / Competitor
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
Banned
OH, YES THEY DID !!!!!!!!!!!!!!!!
Bad Idea Baja
Charter Member
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
Founding Member / Competitor
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
Charter Member
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
Gotta go to CR lower unit.
Standard rotations use RH props.
CR use LH props
Last edited:
MOBILEMERCMAN
Founding Member / Competitor
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
Banned
I THINK U CAN ?? if i change rotation on a bravo, i just shift reverse !!!
SO the upper would also turn oposite ....NO ???
MOBILEMERCMAN
Founding Member / Competitor
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.
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
Banned
makes sense...dont yell at me and get mad..i am learning JIm..lol:sifone:
fixxxer22
SO Tech Expert: Ford PSD's
:iagree: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.
Similar threads
