Anything between carb & arrestor?
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=3254
Printed Date: November-23-2024 at 10:15am
Topic: Anything between carb & arrestor?
Posted By: David F
Subject: Anything between carb & arrestor?
Date Posted: March-27-2006 at 7:39am
I am finally getting around to replacing my old automotive (partially marinized) carburetor with a Holley marine 4160. Now that I am completely getting rid of all automotive components, my question is what goes between the carb and spart arrestor.
I currently had a generic spacer that seems not right. I have heard that gaskets should be avoided because they can soak up excess fuel and burn. However, I must use something as the spark arrestor interfers with top of the carb if nothing used. I need about an 1/8" thickness to avoid interference between the two parts.
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Replies:
Posted By: AWhite70
Date Posted: March-27-2006 at 8:00am
SkiDIM sells a http://www.skidim.com/prodinfo.asp?number=RM0129 - Spark Arrestor Gasket
It's about an 1/8" thick. What interferes when you don't have a gasket? My '79 didn't have a gasket and everything fit fine. I've since installed the gasket just to be safe
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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: David F
Date Posted: March-27-2006 at 8:05am
The bottom of the arrestor hits the boss on the carb fuel bowl where the float adjustment would normally be on the automotive version.
I guess my concern about a fuel soaked gasket is unfounded. And doh!...forgot about looking at skidim. Thanks.
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Posted By: rmcdonald
Date Posted: March-28-2006 at 7:45pm
Hi David
I found this info on Holley Marine Carbs when I purchased a 4010. I have highlighted it in bold
below
FROM HOLLEY MARINE PERFORMANCE PRODUCTS
Marine carburetors have certain modifications that make them uniquely adaptable and legal for marine usage. "Legal" meaning that it has the ability to pass the U.S. Coast Guard test for marine carburetors. Folks, I'm not talking about Paris Island here, either. The main qualification that a marine carburetor must meet (as set down by the U.S. Coast Guard) is that if the carburetor should "flood" only .5cc of fuel is allowed to escape in a period of 30 seconds. There's also a "backfire" test which confirms the ability of carburetor/flame arrestor combination
to contain the backfire. For this reason a gasket is not used between the carburetor airhorn flange and the flame arrestor. It's possible that this gasket could become saturated with fuel (if the carburetor should flood) and become a potential fire source as a result.
For this reason a gasket is not used between the carburetor airhorn flange and the flame arrestor. It's possible that this gasket could become saturated with fuel (if the carburetor should flood) and become a potential fire source as a result.
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Posted By: David F
Date Posted: March-29-2006 at 7:07am
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So I am not crazy after all. I wonder what the "gasket" that skidim sells is made of? A plastic ring would be perfect.
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Posted By: HOLESHOT
Date Posted: March-30-2006 at 10:15am
i use a o ring that came off a omc outboard lower unit the o ring is used on the hub for the prop
u should be a ble to get one at ur local omc parts dealer the oring seals the prop hub with the gear case housing it sould work without being a fire hazard
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IF IT HAS A SPARKPLUG I CAN FIX IT
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Posted By: David F
Date Posted: April-03-2006 at 2:58pm
Holeshot:
I purchased the o-ring you mentioned and it was not thick enough. The arrestor still hit the top of the fuel bowl. I went back with the plastic spacer I was using before. Thanks for the idea anyway.
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Posted By: HOLESHOT
Date Posted: April-21-2006 at 1:31am
david what type of flame arester do u have
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IF IT HAS A SPARKPLUG I CAN FIX IT
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Posted By: skyhawkflyer
Date Posted: April-21-2006 at 9:26am
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rmcdonald is right on the money. There is not suppose to be a gasket there. You can install one if it makes you feel good, but for the reasons cited above that is why one is not installed.
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Posted By: David F
Date Posted: April-21-2006 at 9:51am
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I have a conventional metal screen spark arrestor. I have no idea what brand. I believe some may have a neck built onto the arrestor which would raise it off the carb a bit. I went ahead and continued to use the plastic spacer and sold it to my friend that way.
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