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Switching to manual petcock

 
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shaneisshane
Junior Wrench


Joined: 22 Sep 2013
Posts: 8
Location: CEN FLORIDA

PostPosted: Mon Sep 23, 2013 12:21 am    Post subject: Switching to manual petcock Reply with quote

Hey y'all! new to the forum here. I just picked up a 1982 cv80 for my wife and I am trying to get her on the road. What I already knew was the problem to start with is the original vacuum petcock. It leaks. After doing a little bit of reading on your forum, I found the easiest and most common thing to do is replace the original vacuum petcock with a manual petcock. The original vacuum petcock has 5 hoses connected, if I replace with a simple manual petcock, what do I do with the other 3 lines? thanks for any help or direction y'all!
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DandyDan
Site Admin


Joined: 17 Oct 2007
Posts: 1076
Location: Victoria, BC

PostPosted: Tue Oct 01, 2013 11:45 am    Post subject: Reply with quote

A lot of them simply aren't needed. All you need with a manual petcock is fuel in and fuel out. With the stock petcock you've also got the vacuum lines to open it, so you can just cap those off.
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shaneisshane
Junior Wrench


Joined: 22 Sep 2013
Posts: 8
Location: CEN FLORIDA

PostPosted: Thu Oct 03, 2013 3:21 pm    Post subject: Reply with quote

DandyDan wrote:
A lot of them simply aren't needed. All you need with a manual petcock is fuel in and fuel out. With the stock petcock you've also got the vacuum lines to open it, so you can just cap those off.


Thanks DandyDan! thats what i will do, crossing my fingers...will let y'all know

Shane
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shaneisshane
Junior Wrench


Joined: 22 Sep 2013
Posts: 8
Location: CEN FLORIDA

PostPosted: Wed Oct 23, 2013 12:55 am    Post subject: INEXPENSIVE SHUTOFF Reply with quote

I have went and purchased a very inexpensive fuel shut-off, it seems to work for the moment. The carb is getting gas now cause it leaks now too, haha...anyway, now to find the next spare evening and figure the leak out, probably the gasket or the float bowl needle is not seating...just a guess, I'll start there anyway. Shane
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shaneisshane
Junior Wrench


Joined: 22 Sep 2013
Posts: 8
Location: CEN FLORIDA

PostPosted: Sun Oct 27, 2013 1:32 pm    Post subject: NO NORE LEAK Reply with quote

hey y'all, no more leak and it was neither of the 2 issues I had originally mentioned. I just needed to tighten up the screw on the bottom of the bowl (called the "air screw set" on a breakdown I found)
Shane
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robeye
Junior Wrench


Joined: 19 Oct 2013
Posts: 9
Location: Grand Forks, BC Canada

PostPosted: Tue Nov 12, 2013 4:03 am    Post subject: Reply with quote

I too will be scrapping the vacuum petcock in favor of a simple valve like the ones used for lawn tractors.. also an inline filter. I have three CV80's and not one of those petcocks work.. fortunately none of my carbs leak. And if the float is adjusted properly than that should stop the flow of fuel. The drain screw can be a problem too.. I had one that was rotted away and would not work.
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1982 Cv 80..My Blog.. www.robeye.blog.com
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shaneisshane
Junior Wrench


Joined: 22 Sep 2013
Posts: 8
Location: CEN FLORIDA

PostPosted: Wed Nov 13, 2013 8:09 pm    Post subject: Reply with quote

robeye wrote:
I too will be scrapping the vacuum petcock in favor of a simple valve like the ones used for lawn tractors.. also an inline filter. I have three CV80's and not one of those petcocks work.. fortunately none of my carbs leak. And if the float is adjusted properly than that should stop the flow of fuel. The drain screw can be a problem too.. I had one that was rotted away and would not work.


Yep, my drain screw is causing a problem. :/
The leak has slowed down, but im not sure how much tighter i want to turn that screw...oh well, we'll figure something out.
Shane
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robeye
Junior Wrench


Joined: 19 Oct 2013
Posts: 9
Location: Grand Forks, BC Canada

PostPosted: Wed Nov 13, 2013 9:34 pm    Post subject: Reply with quote

Yup.. And I think there is no good way of fixing the float bowl drain screw.. good thing I have two good ones.
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1982 Cv 80..My Blog.. www.robeye.blog.com
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