Trouble identifying drive.

[nauti dreams]

This is on a 1978 220 overnighter there is evidence that its been changed. Like original trim switch was only up and down now it has one that's in all directions. There is a older extra set of hydrolic hoses going through the transom also I found this website

http://www.sterndrive.info/sterndriveparts/identify_my_outdrive.html

and mine is identical to the gen 2 but I'm being told its not. Here is a pic of what I have.

 

[Bt Doctur]

The drive is either MR, or Alpha1 . The hyd rams are a bit older more for a Series1 , MC-1 type. If the top of the drive is square and the gibbal housing is rounded the housing is MC-1 type and the drive was replaced.

 

[nauti dreams]

OK did some more research and it is a alpha 1. Not the gen 2. Anyone know what kind of power they will take? I know off the line punching it will break them but just normal cruising what will hold up? I plan to build the 188 and put back. Not a lot more power but I have a block with a steel crank want to port intake and heads, maybe aftermarket intake. Its a big boat so I plan to take it slow and easy.

Also I'm thinking about through hull exhaust to reduce heat in the out drive and prolong its life. Any thoughts?

 

[Bt Doctur]

maybe 275Hp

 

[nauti dreams]

OK that's plenty to play with. Just didn't wanna push it if it was already close to max. The few HP I hope to gain won't matter.

 

[nauti dreams]

What about the exhaust heat going through the drive. Is it a lot better to run it through the hull?

I know water goes through the manifolds and then through the out drive with the exhaust.
could I get an auxiliary pump and push fresh cold water through also to counteract it. Haven't read of anyone doing this but it would drop the temp quite a bit. Ide think. Don't have a ton of cash so trying to take any unneeded stress away anywhere I can to prevent failure.