what drive is it?

[bigskiohio]

1973 mercruiser 120. What model is it ? pre alpha i know but which one.
model 0,1,2, r ,mr. If i go to order parts which model would i say it is.
My guess is a R.

 

[ziggy]

Re: what drive is it?

my 72 and 75 165hp engines both have 1 drives...
this might help too..
http://www.mercstuff.com/drive_id.htm

 

[bigskiohio]

Re: what drive is it?

and how do you know they are ones and not R's,MR's. If i am looking for water pump what would i say. How can i find out for sure,the web page you linked says pre alpha/R ,no ones.

 

[ziggy]

Re: what drive is it?

assuming you get a mercury waterpump kit. it won't matter. as the kit covers model 1 thru alpha 1 (s/n 2495186-OD469858)+ merury/mariner o/b 65hp (4 cyl.) and abovewith the small vane impeller. that's right off the package.
mercury precision parts
water pump upper repair kit
46-96148T 8

this kit also included the upper housing. you can get it w/o too....

 

[Don S]

Re: what drive is it?

1973 mercruiser 120. What model is it ? pre alpha i know but which one.
model 0,1,2, r ,mr. If i go to order parts which model would i say it is.
My guess is a R.

The 140 from 1970 thru 1982 used the mercruiser 1 drive. 83 and 84 it was an R drive, in 85 it was the MR, from 86 thru 90 it was the Alpha I, from 91 to present the 140 (aka 3.0L) uses an Alpha I Gen II.