| |
Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | Click on image for the lowdown. 
====
| | | Forums66 Topics128,005 Posts1,055,254 Members48,418 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | 
#70717 12/28/2006 4:17 AM | Joined: Sep 2006 Posts: 2 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2006 Posts: 2 | I recently purchased a 292 that is a Mercury marine engine. Engine is new with less than 5 hours time on it. What is the difference if any between these engines and the truck ones? My son worked a couple of summers at Mercrusier in Stillwater and he said the only difference is in the gaskets. True? Decals on engine indicate 200 hp and 93 octane fuel. Any help would be appreciated. | | |
#70718 12/28/2006 5:09 AM | Joined: Nov 2002 Posts: 1,002 Shop Shark | | Shop Shark Joined: Nov 2002 Posts: 1,002 | I've seen this topic come up several times. I did a search here and on Inliners.org and the only thread I came up with is here;
http://www.inliners.org/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=1;t=002239
and it's for a 250 and,,, From the octane requirement sounds like they have changed the compression. Have you checked any of the casting numbers?
Larry
I don't own a vehicle that isn't old enough to drink.
| | |
#70719 12/28/2006 5:41 AM | Joined: Feb 2004 Posts: 29,740 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,740 | No hands-on knowledge with the sixes, but the Mercruiser V-8's have a tendency to be hot rods, with more compression, hotter cams, and usually bigger carburetors. if they're reccomending 93 octane, I'd guess it's 9.5:1 compression or higher.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | |
#70720 12/28/2006 6:10 PM | Joined: Sep 2006 Posts: 2 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2006 Posts: 2 | checked the casting numbers and here is what I found:
engine block 3921970 66-76 292
head 3927763 67-72 74cc chamber
two other numbers on side of head between spark plugs were 7768 and 5060.
Has Mercruiser alum valve cover. Will be installing engine in a '46 1/2 ton and adding electronic ignition from a later 292. Any one with experience in this model? Have installed a pacer independent front end under the truck. Plan on using a 4 speed since I have a 3:08 rear end. | | |
#70721 12/28/2006 10:39 PM | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Sounds like a great installation to me. I,ve worked on hundreds of 292,s. Tough engine. The only weak point is the exhaust manifolds. They burn em out & warp them. I would use headers or maybe the marine version has something better then the trucks.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
#70722 12/28/2006 10:40 PM | Joined: Oct 2001 Posts: 130 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2001 Posts: 130 | some body might have immediate knowledge of this,but one thing we have checked on marine engines is the direction of rotation. it seems that some rotate the opposite of automotive engines. good luck!
our garage is a non-profit organization
| | |
#70723 12/29/2006 4:57 PM | Joined: Feb 2004 Posts: 29,740 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,740 | Gary, on twin-engine boats, one engine will be counter-rotating, at least most of the time. I think that's mostly the V-8's, though. Lots of 350's and 454's out there like that!
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | |
#70724 12/29/2006 8:00 PM | Joined: Jul 2005 Posts: 5 Junior Member | | Junior Member Joined: Jul 2005 Posts: 5 | One difference may be the camshaft. On Inliners there have been Mercrusier threads and some say they run great and others say the cams are all wrong for a motor vehicle. It may be worthwhile to degree it to be sure. | | |
|
|
| |
