Holley Carb Question
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=30632
Printed Date: October-08-2024 at 11:19pm
Topic: Holley Carb Question
Posted By: Nautiquehunter
Subject: Holley Carb Question
Date Posted: July-08-2013 at 3:02pm
| I recently bought a 84 Supra Comp PCM 351 and 1-1 trans. It needed a lot of repairs one being a carb overhaul. This is the first boat I owned with the engine mounted at an angle. I found out the hard way that the floats cannot be set to the specs in the instructions. After a couple tries I got it about 95% . I lowered the front and rear float levels but after thinking about it should I have lowered the rear? With the angle of the carb I would think I should have left it to spec or even raised it. What do you think? |
Replies:
Posted By: cadunkle
Date Posted: July-08-2013 at 5:37pm
| I'd imagine you'll need to slightly lower the primary level and slightly raise the secondary level. If you do not have a wedge carb spacer or intake with an angled carb mounting pad you can run one of there http://www.summitracing.com/parts/trd-2028" rel="nofollow - wedge carb spacers to get your carb closer to level. I prefer to run a 4150 with externally adjustable floats as you can set the level to exactly where it should be and quickly and easily adjust if the level needs tweaking. |
Posted By: 89Martinique
Date Posted: July-08-2013 at 7:35pm
|
Haha, I'm not the only Supra Comp owner! ------------- Current Boats: 1992 Supra Comp-TS6M PCM 351w HO Pro Boss Pro-Tec Ignition - Full Composite (no wood stingers!) 1989 (3rd Gen) Correct Craft Martinique B/R PCM 351w Power Plus 1984 E-Scow Keuka Lake, |
Posted By: Gary S
Date Posted: July-08-2013 at 8:31pm
Is the 4150 with an externally adjustable floats a marine carb? ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
cadunkle wrote:Posted By: cadunkle
Date Posted: July-08-2013 at 8:37pm
You need to be sure to get a marine version. |
Posted By: Nautiquehunter
Date Posted: July-08-2013 at 10:11pm
| Yes its the original marine carb. No it does not have external adjustments. I have to remove the float bowl every time I make an adjustment. I'm just not experienced with angle mounted carbs and there settings . Is there something to go on better than trial and error? |
Posted By: cphase
Date Posted: July-08-2013 at 10:22pm
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Pull the bowl off and invert it. Looking at the top(which is now the bottom) of the float, set it just shy of parallel with the top(also the bottom now) of the bowl. That is a good starting point and sometimes it is trial & error. ------------- Thanks, Jeff http://www.correctcraftfan.com/diaries/details.asp?ID=6549" rel="nofollow - 82 SN http://www.archlinux.org" rel="nofollow - Arch Linux |
Posted By: Bri892001
Date Posted: July-09-2013 at 12:15am
|
It seems like there are a lot more instances of primaries leaking than secondaries leaking. If the primaries aren't leaking, I'd say test drive it. You'd probably be able to tell if it's starving for fuel when the secondaries kick in. |