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What Generation Alpha

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18Warrior

Contributing Member
Hi. Can someone tell me if this is a Gen 1 or Gen 2 Alpha outdrive?
 

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  • CV 23 Drive unit Serial.jpeg
    CV 23 Drive unit Serial.jpeg
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Mercruiser (R / Mr Alpha One Sterndrive) Engine Components​

That is what the book says. There was a brief period of time where a "R" unit was built. It's guts were like that of the '82 & earlier but externally it looked like an "MR"/Alpha gen1.

What year is the boat?
 
Droid said:

Mercruiser (R / Mr Alpha One Sterndrive) Engine Components​

That is what the book says. There was a brief period of time where a "R" unit was built. It's guts were like that of the '82 & earlier but externally it looked like an "MR"/Alpha gen1.

What year is the boat?
Click to expand...
It's an 88 Carlson Glastron CV 23, with a 5.7 carbed motor
 
1988- Alpha One Gen 1

OC prefix also fits.

MR (earlier) and Alpha are 100% identical with the exception of the lower unit vertical drive shaft. MR has an oring grove near splines at top.

R drive (prior to MR) had a few differences including the way the lower unit vertical drive shaft bearing was installed, the opposite of the MR and Alpha.
 
kghost said:
1988- Alpha One Gen 1

OC prefix also fits.

MR (earlier) and Alpha are 100% identical with the exception of the lower unit vertical drive shaft. MR has an oring grove near splines at top.

R drive (prior to MR) had a few differences including the way the lower unit vertical drive shaft bearing was installed, the opposite of the MR and Alpha.
Click to expand...
Thanks for the information. That means the water pump kit I ordered will fit this drive.
 
18Warrior said:
Thanks for the information. That means the water pump kit I ordered will fit this drive.
Click to expand...
our host here has a search by serial for merc drives and engines -

MerCruiser Motor Parts at MarineEngine.com

Buy from the largest online inventory of genuine MerCruiser stern drive parts including discount aftermarket parts. New and vintage parts available at MarineEngine.com.
www.marineengine.com www.marineengine.com

that ensures you will get the right parts for your application. They usually have both aftermarket and OEM options. Typically getting OEM impellers is worth the cost as they last longer
 
Dieter said:
our host here has a search by serial for merc drives and engines -

MerCruiser Motor Parts at MarineEngine.com

Buy from the largest online inventory of genuine MerCruiser stern drive parts including discount aftermarket parts. New and vintage parts available at MarineEngine.com.
www.marineengine.com www.marineengine.com

that ensures you will get the right parts for your application. They usually have both aftermarket and OEM options. Typically getting OEM impellers is worth the cost as they last longer
Click to expand...
I did go through the host site, but I could not find a listing for the water pump kit. I did find a Sierra water pump kit on Amazon, which I ordered. The part number for the kit is 18-3320. Also, being in Canada means that I face longer delivery times for parts ordered from Marine Engine, as well as higher delivery charges.
 
For anyone else wondering , the early drives MC1 R MR use 2 side nuts, 2 bottom nuts and 1 nut in the front.
GEN II drives use 4 side bolts and nuts and 1 from bolt "usually
 
Dieter said:
our host here has a search by serial for merc drives and engines -

MerCruiser Motor Parts at MarineEngine.com

Buy from the largest online inventory of genuine MerCruiser stern drive parts including discount aftermarket parts. New and vintage parts available at MarineEngine.com.
www.marineengine.com www.marineengine.com

that ensures you will get the right parts for your application. They usually have both aftermarket and OEM options. Typically getting OEM impellers is worth the cost as they last longer
Click to expand...
Post #2 was taken directly from the search by S/N.
Mercruiser was so kind as to lump all 3 drives together. Need to see the top of the driveshaft to determine what is inside.
 
Droid said:
Post #2 was taken directly from the search by S/N.
Mercruiser was so kind as to lump all 3 drives together. Need to see the top of the driveshaft to determine what is inside.
Click to expand...
Based on the year of the boat 1988. It ia impossible the drive could be an R drive.
Unless someone installed an older drive on a newer boat
 
Droid said:
Post #2 was taken directly from the search by S/N.
Mercruiser was so kind as to lump all 3 drives together. Need to see the top of the driveshaft to determine what is inside.
Click to expand...
My research showed Serial number match boat year of 1988
ALPHA ONE GEN 1.

NOT MR and NOT R
 
18Warrior said:
I did go through the host site, but I could not find a listing for the water pump kit. I did find a Sierra water pump kit on Amazon, which I ordered. The part number for the kit is 18-3320. Also, being in Canada means that I face longer delivery times for parts ordered from Marine Engine, as well as higher delivery charges.
Click to expand...
ok as long as you know it is there. In the past I have had to ask ME for kit info. I think when I ordered my bellows kit it wasn't laid out in the parts diagram either
 
Droid said:
Post #2 was taken directly from the search by S/N.
Mercruiser was so kind as to lump all 3 drives together. Need to see the top of the driveshaft to determine what is inside.
Click to expand...
that was for the OP wasn't sure if he knew that feature is on the site.
 
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