engine replacement
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=3698
Printed Date: November-23-2024 at 12:38pm
Topic: engine replacement
Posted By: WVNautique79
Subject: engine replacement
Date Posted: May-29-2006 at 7:09pm
I'm putting a new engine in my 79 SN, and I found a fuel injected 351W that needs rebuilt. Does anyone know if my intake will bolt up, or if there will be any other problems using this motor? Thanks
Kevin
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Replies:
Posted By: AWhite70
Date Posted: May-30-2006 at 1:43pm
I'm a little confused by your question. Are you planning to put the injected 351 in your '79? If so you have more to worry about than intake (i.e. rotation of engine). What exactly are your plans? Is this an automotive 351W?
To answer your question, yes, I believe the intakes will bolt up. But there are a lot of other issues. Any fuel injected 351W that I'm aware of will be LH (std.) rotation. Your '79 SN had a RH (rev.) rotation engine. You can switch rotations by getting a new prop and changing the orientation of the pump cover in the transmission. If you are converting an automotive engine make sure all of your electrical components are marine grade (i.e. starter, alternator, distributor). If not you're leaving yourself open to fire or explosion.
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AWhite70
http://www.correctcraftfan.com/diaries/details.asp?ID=562&sort=revyear&pagenum=5&yrstart=1976&yrend=1980" rel="nofollow - '79 Ski Nautique
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Posted By: WVNautique79
Date Posted: May-30-2006 at 5:50pm
My plan is to take a core 351W and replace my 351W, which has a cracked block. I'm using everything from my old engine that I need to. So what year 351W do I need for the RH rotation? Thanks
Kevin
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Posted By: 79nautique
Date Posted: May-30-2006 at 8:26pm
In your case it doesn't matter on the rotation since your swaping everything out and you should be good to go. If worst comes to worst you should be able to use the old heads and not worry about the bolt pattern, just count the bolts on the intake of the FI and if they are the same number on your current application it will bolt up. On some they use 12 bolts and others they use 16.
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http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique
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Posted By: WVNautique79
Date Posted: May-30-2006 at 10:26pm
that could be a problem, cause I have a screwed up exhaust port on one of my heads.
What determines the rotation of the engine?
Kevin
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Posted By: 79nautique
Date Posted: May-31-2006 at 4:25pm
the engine designer decided the rotation and the boat manufacturer decided what to use for there application.
count the number of bolts used to attached the intakes and if they match then move forward using the orginal crank, cam, dist, water pump, starter, alternator and transmission of the cracked engine block
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http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique
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Posted By: WVNautique79
Date Posted: May-31-2006 at 4:37pm
Thanks 79Nautique, that's what I thought.
Kevin
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