Offshoreonly.com - Mid 80's Open Class Mercruiser 500 efi

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Offshoreonly.com (https://www.offshoreonly.com/forums/)

- Classic Offshore (https://www.offshoreonly.com/forums/classic-offshore-199/)

- - Mid 80's Open Class Mercruiser 500 efi (https://www.offshoreonly.com/forums/classic-offshore/224935-mid-80s-open-class-mercruiser-500-efi.html)

Pismo10

01-27-2012 05:24 PM

100 octane minimum in the ad. 12:1 amazing. 700+ hp. Cool...

CIG3	03-02-2012 07:13 AM

It your lucky day. a 337 Scarab just hit classifieds. parting it out. It has (2) of these motors in it. Good Luck

14 apache

03-02-2012 03:39 PM

Quote:

Originally Posted by aex (Post 3598923)

I'm still looking for any wiring diagrams , service/diagnostic and parts info on these EFI systems .
Some OSO a hole sold me spares a two years ago . He screwed me out of the manifolds though , threw everything in a ****ty box that broke in shipping losing some of it's contents and never provided me with the service books he claimed he had .
I'm putting these motors in my old Chris and anything would be of great help in getting these things up and running .

Those computers do not work that great part throttle. I believe the only way you can change any of the tune up is by changing some of the resitors inside. I may have one distributor for that set up. You would be better off installing new electronics inside that big computer. Fast xfi would fit.

aex	03-02-2012 08:26 PM

Quote:

Originally Posted by CIG3 (Post 3631520)

It your lucky day. a 337 Scarab just hit classifieds. parting it out. It has (2) of these motors in it. Good Luck

On OSO classifieds ?

Quote:

Originally Posted by 14 apache (Post 3631837)

Interesting point on the part throttle operation . I've got two almost complete spare systems and the original ones ran great before I started the rebuild .
I do agree new electronics would be a step forward .

Biggus

03-03-2012 04:35 AM

Here's the link.

http://www.offshoreonly.com/classifi...o44269-en.html

aex	03-03-2012 08:13 AM

My drives are presently at Offshore In FLL getting rebuilt , but if I can find a couple of spares for decent price I'll bite .
I've been offered junk for stupid money so far , however there is a gentleman in upstate NY with a pair that may be worthwile .
It seems anyone with a spray can suddenly has a fresh pair lol .

aex	10-31-2012 01:44 PM

3 Attachment(s)

Yesterday I spoke with Errol Lanier whom I had met in the late 80's . He is well and building an awesome line of small cats . He could not help , however he referred me to Mel Riggs @ Riggs Marine in Wisconsin as had OSO member Biggus ( Thank You ) So I did call him and he is checking .
I have motors assembled and almost dyno ready .
Here are a few more pics .
Anyone with anything ?
( shop manuals , wiring diagrams , diagnostic info )

Fenderjack

10-31-2012 01:53 PM

If Riggs doesn't know I don't think any one will LOL. That man is a mound of knowledge

John jr

innerrage

10-31-2012 07:37 PM

call performance marine in bolton landing new york and ask for jason sarris,he will no or have manuals on them engines .worth a call.

aex	10-31-2012 08:07 PM

Quote:

Originally Posted by Fenderjack (Post 3806564)

If Riggs doesn't know I don't think any one will LOL. That man is a mound of knowledge

John jr

Yes , he is an accomplished individual .

Quote:

Originally Posted by innerrage (Post 3806783)

call performance marine in bolton landing new york and ask for jason sarris,he will no or have manuals on them engines .worth a call.

Thanks , I think they helped us out way back when the Chris Cat was almost new and Jason sent me a couple of racing tapes .

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