Original Motor? What do you think?

I'll see if I can't post another topic here with out it turning into a Jery Springer show.

When I picked up this jewel "I was told" by the cat I go her from that this is the original engine. Well, we all know what happened last time I made mention of what I was told so I am trying to type as careful as I can.

Is this the original engine or not??? I have had comments both ways. In saying that, let's get into the subject.....what are your thoughts?

This craft is titled as a 1970 Correct craft with a motor number (per the title) as 21344097. It is a 230 OMC and "I was told" that this was a Chevy 305. Can anyone confirm or deny this?

There was also some talk about this water pump or something to that affect. Not having a lot of savvy with this older junk I really don't know what the point was. Any help there.

If you need anything further from me as far as marking on the engine just holler back. The cover comes on and off with in 2 seconds and I can get you what ever else you may need.

Thanks in advance for all of the feedback.

Jim ~
505-220-3460 (cell, any time)

the 230, chances are that it is a 305, see if you can pull the cast numbers off the block right behind the heads at the back, if you can pop a valve cover and grab those casting numbers also
Eric

Are these water pumps unreliable? What can I swap it out with. I can't stand unreliable crap so if it is recommended that I upgrade it then I would love to do so. Thanks!

Jim ~

70, I can't answer if it is unreliable or not, It is just not common. It may last much longer than a "normal" inboard raw water pump because it is build like an outboard motor water pump?

I changed it right away and did not use it. I wanted a pump that I could easily get parts for.

70, you got an interesting boat there. If it's original, it's really interesting because of all the later model hardware. If not, no big deal. It looks like a nice boat, and for what you paid, you're not going to get hurt. Enjoy it.

I have a 74 Penn Yan with a 225 horse OMC and it is a 307 chevy. It can not be a 305 (if its original) because as stated above that block didnt start till '76. I owned a 76 Chris Craft supersport that had the 305 and it was also badged as a 225hp.

The chevy 327 was also used a lot as a marine engine in the late 60's and into 1970. I believe it well could be a 327. This would explain the 5 extra hp. over the 307, or the 305 badged engines.

That water pump is a stout unit, new impellers are available and are the same as the stringer mount I/O pumps.

Here is my 1974 307ci chevy 225 horse





dave

my .02...

Even though the water pump is old and a bit of an oddball, White Lake was able to get me an impeller with no trouble and that was just a periodic maintenence item, the older one was still fine I've been running that pump for three years with no problems so I wouldn't worry about it.

As for as the originalness of the engine, I copied this table from some website, so I can not attest to its accuracy. But I know when I got my boat I did some homework and concluded the same as above, that the 305 came out in 76. If thats true, it's either a replacement or a 350. My guess is its a replacement since it is identical to my 76.



>>>>>>>>>>>>>>>>>>>>>>>>>>

General Engine Block Specifications
While 6 different bore size blocks have been produced, the small block engine can be classified into 3 bore sizes and 3 main bearing sizes. 283 blocks (3.875" bore, 2.3" main), 302/327/350 blocks (4" bore, 2.3" or 2.45" mains), and 400 blocks (4.126", 2.65" mains). In 1968 the main bearing saddles were increased in size from 2.3" to 2.45".

CID   Year   Bore   Main Cap
262   1975   3.671   2 bolt ONLY
267   1979 - 81   3.500   2 bolt ONLY
305   1976 - 96   3.736   2 bolt ONLY
307   1968 - 73   3.875   2 bolt ONLY
327   1968-69   4.001 (2.3" main)   2 bolt
350   1968-88   4.001 (2.3" main)   2 bolt
265   1994   4.001 (2.45" main)   2 bolt
302   1968-69   4.001 (2.45" main)   4 bolt
350   1968-96   4.001 (2.45" main)   4 bolt
400   1970-72   4.126 (2.65" main)   4 bolt
400   1973-80   4.126 (2.65" main)   2 bolt

Another big bonus is the rear/top mount starter
If you've changed one of these in a deal like Michigan Daves pic above, there a godsend!

Great Looking 37 y/o Boat

I did a quick search on google and found a site which provides OMC maintenance manuals. It appears that OMC did offer a 230 in 1970. Without buying the manual, it did not list the displacement. As said previously, it could not be a 305 as that configuration was not offered till 76. BKH

Mack, this is about the only way I found to change my starter, I had other reasons for pulling the engine but the starter was primary.



dave

Michigan, I would find me a bellhousing that uses the reverase/top mount starter while I had that tractor was still on hand! LOL