Torque Settings
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=3608
Printed Date: November-27-2024 at 12:28am
Topic: Torque Settings
Posted By: jagnweiner
Subject: Torque Settings
Date Posted: May-19-2006 at 9:37am
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Not a CC owner, but you guys seem to have about the most helpful forum going. I have a '71 Century Resorter w/ a Chrysler 340 (great boat). One of the nuts holding the carb to the manifold has been missing for the three years I have owned it. I finally got around to getting a new nut, but was wondering how much this nut should be torqued down. I assume that it would be the same on pretty much any V-8.
Thanks. ------------- Scott Johnson |
Replies:
Posted By: AWhite70
Date Posted: May-19-2006 at 10:42am
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I use my calibrated arm and get it "about that tight". I've never been able to get a torque wrench on mine so I just snug them up pretty good, being careful not to over torque them.
Usually carb studs are 5/16" and the standard torque for a Grade 5 5/16" nut is 18lb-ft. I'd say don't go any higher than that. ------------- AWhite70 http://www.correctcraftfan.com/diaries/details.asp?ID=562&sort=revyear&pagenum=5&yrstart=1976&yrend=1980" rel="nofollow - '79 Ski Nautique |
Posted By: bkhallpass
Date Posted: May-19-2006 at 10:46am
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Welcome Scott,
I'd say about a half grunt should do it  BKH------------- Livin' the Dream |
Posted By: jagnweiner
Date Posted: May-19-2006 at 11:46am
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Thanks, guys. I guess that's about what I figured. ------------- Scott Johnson |
Posted By: David F
Date Posted: May-19-2006 at 12:05pm
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Yep, not too tight. Over tightening can warp the carb base plate and lead to vacuum leaks, etc. Just snug her down. ------------- |
Posted By: jagnweiner
Date Posted: May-19-2006 at 12:24pm
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Yeah, I think I may have a vacuum leak already from running it with the missing nut for so long. At the end of the season I will probably take the carb off, check for flatness and reinstall with a new gasket. For now I'll make do.
It has problems on take off. If you "floor it," the engine just dies. If you ease into it, it does fine. I also experienced some sluggishness at full throttle. I was pulling a barefooter for the first time a few weeks ago, so I was pretty much at full throttle. Ran great for a few runs, then started losing power at full throttle. I'm also changing the fuel filter, which hasn't been hanged since I bought it. Thanks for all the help. Like I said, you guys seem to have the best thing going. ------------- Scott Johnson |
Posted By: AWhite70
Date Posted: May-19-2006 at 2:01pm
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The symptoms you describe could also be a bad accelerator pump or the linkage on the accelerator pump needs to be adjusted.
When I rebuilt my carb there was a dead spot on the throttle right when you'd take off. I found the accelerator pump had too much slop in the linkage. I reduced the clearance and then the hole shot was instantaneous. ------------- AWhite70 http://www.correctcraftfan.com/diaries/details.asp?ID=562&sort=revyear&pagenum=5&yrstart=1976&yrend=1980" rel="nofollow - '79 Ski Nautique |
Posted By: jagnweiner
Date Posted: May-19-2006 at 2:53pm
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I'll check that out. Thanks. ------------- Scott Johnson |