Boat Design Forums  |  Boat Design Directory  |  Boat Design Gallery  |  Boat Design Book Store  |  Thanks to Our Site Sponsors
  #1  
Old 06-28-2010, 02:09 PM
jrbrailsford jrbrailsford is offline
 
Join Date: Jun 2010
Rep: 10 Posts: 2
Location: Utah
351 marine engine/351 car engine

I have a ford 351 "175" omc engine that is cracked, I was wondering if it does run opposite from a 351 car motor and if I should replace with a marine motor or can I swap parts to a car block and use that? Also, did all the 351 marine motors turn opposite?
Thank you for all your help
Jerry
Reply With Quote
  #2  
Old 06-29-2010, 04:24 AM
CDK's Avatar
CDK CDK is offline
retired engineer
 
Join Date: Aug 2007
Rep: 1798 Posts: 3,109
Location: Adriatic sea
To turn the other way around, the engine would need another cam and starter motor. I cannot think of a good reason to do that, but OMC might have thought different about that.

You can acquire a car engine, look at the cams with cylinder 1 in tdc. If they look very different, use the cam shaft and starter motor from your current engine. Of course also adjust the ignition timing.
__________________
cogito, ergo sum (Descartes' credo)
Reply With Quote
  #3  
Old 06-29-2010, 05:21 AM
Jango Jango is offline
Senior Enthusiast
 
Join Date: Aug 2005
Rep: 63 Posts: 519
Location: Mid Atlantic
Unless your OMC engine was part of a twin engine installation, where typically one runs clockwise (RH) and the second CCW (LH) as viewed from the OUTPUT, your engine is most likely a LH, the same as a car or truck. YES, the blocks are the same as the car/truck, regardless of rotation. Internals of marine engines are mostly truck parts. Camshaft could be slightly different in a truck but will work fine. Car camshafts are more "aggresive" and lack the low speed torque necessary in a boat
Reply With Quote
  #4  
Old 06-29-2010, 06:22 AM
tuantom's Avatar
tuantom tuantom is offline
Senior Member
 
Join Date: Jan 2005
Rep: 45 Posts: 182
Location: Chicago
I'm pretty sure you have a 302 if it's a 175. The 351w was rated at 235 Hp. If you're going by the 351 cast in the heads - both engines used 351w heads for the marine versions in Mercruisers - probably OMC too.
Reply With Quote
  #5  
Old 06-29-2010, 10:36 AM
Jango Jango is offline
Senior Enthusiast
 
Join Date: Aug 2005
Rep: 63 Posts: 519
Location: Mid Atlantic
The 302 Intake manifold is just under 9 in. wide. 351 intakes are around 10 in. wide. My 1974, 302 Mercruiser heads have '302' cast - in under the valve covers.
Reply With Quote
  #6  
Old 06-29-2010, 02:16 PM
Fanie's Avatar
Fanie Fanie is offline
Fanie
 
Join Date: Oct 2007
Rep: 2450 Posts: 4,514
Location: Safrica
If you get the block number you may get the specifics for that engine, probably online off the internet too.

Oh Oh Oh Oh I see it's a Ford. They don't even qualify for anchors nowadays
(Ok, I'll admit, I'm a chevy fan )
__________________
I am a Boer, not an Afrikaner
Water ! Just gimme water !
Reply With Quote
  #7  
Old 06-29-2010, 02:53 PM
troy2000's Avatar
troy2000 troy2000 is offline
Senior Member
 
Join Date: Nov 2009
Rep: 2063 Posts: 1,698
Location: California
Quote:
Originally Posted by Fanie View Post
If you get the block number you may get the specifics for that engine, probably online off the internet too.

Oh Oh Oh Oh I see it's a Ford. They don't even qualify for anchors nowadays
(Ok, I'll admit, I'm a chevy fan )
You obviously have no idea what you're talking about, Fanie.

Ford engines make excellent anchors....
__________________
Ignorance is not an opinion.
-Dilbert
Reply With Quote


  #8  
Old 07-08-2010, 11:38 AM
jrbrailsford jrbrailsford is offline
 
Join Date: Jun 2010
Rep: 10 Posts: 2
Location: Utah
Thank you all for the advice
Reply With Quote
Reply



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Car engine vs. outboard F.H.B. Gas Engines 58 07-11-2010
08:31 AM 
Car Engine vs Marineized Engine Stuff4Toys Gas Engines 12 04-25-2010
06:22 PM 
351 won't crank when its warm iqpaul Inboards 1 05-30-2009
09:11 PM 
351 overheating tonytog Sterndrives 6 07-29-2008
03:49 AM 
volvo marine vs ford 351 windsor kennyharding DIY Marinizing 8 05-28-2005
01:21 PM 

Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.

All times are GMT -4. The time now is 06:18 AM.


Powered by: vBulletin Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Web Site Design and Content Copyright ©1999 - 2015 Boat Design Net