1988 american skier 351w
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=2686
Printed Date: November-23-2024 at 6:44am
Topic: 1988 american skier 351w
Posted By: lmorrison52
Subject: 1988 american skier 351w
Date Posted: November-04-2005 at 8:53pm
I have a cracked block on a Ford 351W. I have been told that a 351W truck engine will be as balanced as the original boat motor. I was referred to this site for advice. I would appreciate any insite as to if I cough use this truck block & attach all the Indmar marine parts & the boat flywheel & make this work in my skiboat. Thanks for any input
Lanny
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Replies:
Posted By: pswann
Date Posted: November-04-2005 at 9:19pm
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CALL WOODY AT 407 851 1965. I talked to him about this same topic a couple of weeks ago and he can tell you all about it. He is a very nice fella who knows a whole bunch about what you are needing to do. Tell him I said thanks for the seal, and put his email address in his profile so we can email him. Are you sure it isnt just a head gasket? What part of the country you in?
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Posted By: lmorrison52
Date Posted: November-06-2005 at 10:49am
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It is the front of the block. An oil galley is in the path of the crack. I have water in my oil. I am near Nashville. Thanks
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Posted By: Fisherman
Date Posted: November-09-2005 at 5:07pm
I'd love to hear what the outcome of this is... Please post a follow up if you would.
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Central Oregon
'79 Ski Nautique
'84 & '85 MBZ Diesels
'79 Apollo 3000DB
It doesn't need to run bad or look bad just because it's old!
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Posted By: nuttyskier2002
Date Posted: November-10-2005 at 8:42am
Imorrison, there are several things to consider when swapping in a replacement motor in your boat. First, is your motor "CW" or "CCW" rotation (as viewed from the from of the engine). All truck 351W motors are "CW" rotation. If your boat engine rotates "CCW" the camshaft and distributor will be different. Also the crankshaft will be machined differently and the rods and pistons may be different as well. An easy way to tell if your engine rotates "CW" is to look at the prop. If it is a left hand prop the engine turns "CW" and vice versa. That is unless your boat has a V-drive where the engine is mounted in the rear. Also I think most gear reduction units change the rotation of the shaft as well, so you'll need to see if you have one of those.
I have a book on small block Ford engines and it indicates there are no differences in the "truck" and "passenger car" blocks unlike the Chevy small blocks. However, the marine engines are equipped with heavy duty pistons, rings, bearing,.... and have a special "marine" ground camshaft even if it is a standard rotation motor. If your "truck" motor is from a pickup, it is basically the same as a passenger car engine and the only thing useful about it to your boat will be the bare block. Just some things to think about before you get started.
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95 Malibu Echelon w/Mercruiser 350 Magnum Skier
Former boats:
88 Ski Centurion Tru Trac II
59 Chris Craft Capri (woody)
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Posted By: lmorrison52
Date Posted: November-11-2005 at 6:32pm
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Thanks nutty, this gives me something else to check out. I will check out the engine rotation vs the prop rotation. The thing I am wondering is if vibration will be a problem in the boat if I use a car or truck motor.
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Posted By: nuttyskier2002
Date Posted: November-11-2005 at 9:16pm
I am unaware of any tighter restraints of specs on marine engines when it comes to balancing. Production engines are balanced pretty well from the factory already and perform quite well all the way up to 4500 RPM. That's about as fast as you want to twist any marine engine (and that’s only occasional). Other factors start to become a concern above this, such as: shaft vibration and wear, packing gland wear, strut bearing wear and prop cavitation (not to mention fuel consumption). Most of the time, while pulling skiers, our tow boat motors stay at or below 3500 RPM. Racing engines are balanced to tighter specs because they constantly turn 9 plus thousand RPM. Since centrifugal forces increase exponentially with engine speed, any unbalancing quickly becomes a concern at that speed.
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95 Malibu Echelon w/Mercruiser 350 Magnum Skier
Former boats:
88 Ski Centurion Tru Trac II
59 Chris Craft Capri (woody)
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