Commander 351 upgrades
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=5697
Printed Date: November-27-2024 at 5:43pm
Topic: Commander 351 upgrades
Posted By: ultrarunner
Subject: Commander 351 upgrades
Date Posted: February-08-2007 at 5:31pm
Well, I plan on taking the boat in for a good once-over and to troubleshoot the loss of power issue that we've already discussed, and it's got me thinking...
Are there some reasonable engine upgrades that might make some sense?
In particular, I was thinking of a carb/manifold and distributor.
I'm not really interested in pulling the motor or even the heads, just some minor updates to increase performance and reliability.
thanks
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Replies:
Posted By: Munday
Date Posted: February-10-2007 at 2:17pm
If you do the manifold your not to far from cam shaft,at least I'd be looking that way.
Munday
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Posted By: 79nautique
Date Posted: February-10-2007 at 9:42pm
forget the intake and carb unless you are going to install a new cam, waiste of money, you're only going to burn more gas and not get any more performance.
The only thing I would suggest is upgrading to electonic igntion, either replace the points with a conversion or better yet upgrade to a new electronic dist. That will improve gas consumption and improve starting and idle. The intake will help slitghtly and i would rebuild the carb before i ever would replace it. The intake will produce a slight improvement not really worth the cost unless you are going to change the valve train then you should replace the intake.
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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: ultrarunner
Date Posted: February-11-2007 at 12:30pm
79 and Munday, thanks so much for your comments. I'll start searching for a replacement distributor. I had previously converted the OEM unit last year from points, but would agree that a new unit would be a good choice.
I've rebuilt and re-jetted a few carbs in my day...but that was a loooong time ago. If I send it out for that work any recommendations? I believe the carb is a Holley 4160.
thanks
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Posted By: GottaSki
Date Posted: February-11-2007 at 1:05pm
IF the carb is proper, its typically jetted spot-on, there is not much to gain unless you dink with the top end.
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole
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Posted By: ultrarunner
Date Posted: February-12-2007 at 10:49am
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I think I'll upgrade the distributor and have the carb rebuilt. I'm more for efficiency. This little boat has plenty of power for my uses.
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Posted By: 79nautique
Date Posted: February-12-2007 at 11:52am
just be sure and get a holley kit and not some other brand of kit to rebuild the carb. Also take it to someone that has a 5 gal bucket of carb cleaner so that the carb completely clean. Using spray carb cleaner never gets everything that needs to be cleaned.
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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: ultrarunner
Date Posted: February-12-2007 at 2:02pm
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Yep, roger on that 79. Thanks.
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