In reading some of the reviews I noticed that several comments were made in regards to the water pump base size being incorrect. When ordering how do we make sure I receive the correct base. It seems that either will mount but if wrong will fail. I am wanting a complete water pump for alpha 1 gen. 2 s#0D627752?
This is not correct for your outdrive. 18-3147 is the correct kit. You do not really have a base necessarily. You have the housing and then a face plate to mount it to. The 18-3147 is for sure the correct kit for your outdrive though.
I have a alpha 1 out drive made in 1988 wich kit do i buy?
This is not the right kit. Alpha 1 Gen II motors began in 1991. MR/Alpha outdrives were from 83-90. So 18-3320 is the correct kit for your outdrive: http://www.iboats.com/Water-Pump-Kit-18-3320-Sierra/dm/view_id.187582
Unfortunately, we are unable to look up parts individually, but if you have your specs of your engine, you can call in and we can provide the number for just the impeller. The phone number to call is located at the top of the screen.