Alpha ?

[Sam]

What's the difference between an Alpha Gen 1 and a Gen 2, and how do you know which one you have.

Sam

[oldLenny]

Alpha Gen II drives are a newer design and have some different features.
The Alpha Gen II upper and lower housings are fastened together with two
through bolts on either side of the drive (along with the front and rear bolts).
Alpha One drives, on the other hand, use one stud visible on either side.
Alpha Ones have two studs under the ventilation plate just above the prop.
Alpha Gen II drives do NOT have two studs with nuts above the prop.

Alpha Gen II drives will NOT fit an older Alpha One Gimbal.
Also the reverse holds true. The Alpha One drive will not fit the newer
style Alpha Gen II gimbal.
Alpha Ones and Alpha Gen II's are not interchangeable in any way.
Most of the parts and dimensions are not the same.
Most parts will not interchange.

Alpha Generation II drives started production is 1991. At that time,
boat manufacturers would use either depending on stock.

The Alpha One Drive used what Mercury considered to be a
"high pressure / low volume" water pump assembly which is
incorporated into the drive. The newer Alpha Gen Two uses
a different pump which is "high volume / low pressure" in nature.

The "R" and the Alpha One used a plastic water pump housing.
The Alpha Gen Two has a Stainless pump housing.

Also, check out the service bulletins by year here. I think you will find a LOT of good reading.
http://www.sterndrives.com/supplies/rightsuppliesindex.html

[GeneD]

What he said!

[Sam]

Thanks Len, looks like I have a Gen II.

Sam

[Moody Blu']

damn I wish I could ask a question and get more than I expected!

good going len!

[Tony]

Broque,
You DID ask a question and get more than you expected. 50 replies under your hood scoop topic...that is unbelievable! I'm giving you another one of those stars just for all the razzing you are taking. And, I might add, I think you are taking it quite well. Welcome to the board!