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  #1  
Old 05-18-2014, 02:08 PM
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Nitro Nitro is offline
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Default Fuel petcock, 1450

Hi all, the petcock on my Quietline tank has started leaking. I have already replaced the bushing once, and I think this valve isn't original, as none online look like it. My question is, this one has 3/8" hose barb on it, and all the ones I see for sale are 1/4". My new carburetor came with a small barb too, I think 1/4" but never measured it. What does your 1450/1650 have? The one on it now has a 1/4 turn lever and the ones for sale have a thumbscrew. Also, some have screens and some don't, I want a screen because there isn't much room for a filter. Thanks!
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Old 05-18-2014, 02:20 PM
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Also, while I am asking about fuel systems, when I was adjusting the fuel screws on the carb I found that I could turn them quite a ways before the engine speed dipped. Particularly the low speed mix, I turned it a turn and a half before I could hear the slightest speed drop. I set them up at 3200 and 1200 rpm using a 4 cyl dwell/tach and multiplying by four. (dwell was right around 32* so I think I got the points close enough.)
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Old 05-19-2014, 03:08 AM
Maxwelhse Maxwelhse is offline
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Hummm... Both of my QL tanks have the 1/4 turn deal and my 149 has the thumbscrew (steel tank). Maybe a common hardware store replacement? I believe they're both 1/4" too.

Also, I was able to put an inline filter between the petcock and the carb. NAPA sells a steel body unit that worked out just great! That screen in the petcock isn't nearly fine enough for my taste.
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Old 05-19-2014, 09:15 AM
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Sounds like some good advice was given.

btw my 1200 has a push pull type shutoff.it is the original one.
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Old 05-19-2014, 11:22 AM
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I checked the fitting that came with the carb and it was 1/4", so I ordered the petcock from Patton. I was hung up on "is 1/4" enough" and remembered that I used 3/8" on a built 440 many years ago, so for this little guy 1/4 is fine. I did set the timing per the manual and ran the valves, I just eyeballed the dwell since I was already using the meter for a tach. Gas engines, in my memory, like 28-32* so I knew I was at least in the ballpark. It already had 3/8 line on it, and any 3/8 inline filter I can find is too big to fit in the space between the firewall and the carb. It ran since '78 with a screen, so I'll be happy with that.
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Old 05-19-2014, 03:47 PM
Bob95065 Bob95065 is offline
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I have a 1000 that I used since new. I practically grew up on it because I did yard work and maintenance for a neighbor who gave it to me about 10 years ago. Anyway, it has a 90° valve at the base of the tank. The valve has a small red handle and is original to the tractor. From the serial # it was made in August 1977.
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Old 05-19-2014, 04:39 PM
Cubby guy Cubby guy is offline
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My 800 has the push/pull type of cutoff, a 1976 model.
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Old 05-19-2014, 07:36 PM
Maxwelhse Maxwelhse is offline
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Quote:
Originally Posted by Nitro View Post
I checked the fitting that came with the carb and it was 1/4", so I ordered the petcock from Patton. I was hung up on "is 1/4" enough" and remembered that I used 3/8" on a built 440 many years ago, so for this little guy 1/4 is fine. I did set the timing per the manual and ran the valves, I just eyeballed the dwell since I was already using the meter for a tach. Gas engines, in my memory, like 28-32* so I knew I was at least in the ballpark. It already had 3/8 line on it, and any 3/8 inline filter I can find is too big to fit in the space between the firewall and the carb. It ran since '78 with a screen, so I'll be happy with that.
I'm confused... You're using 3/8" line on a 1/4" nipple?

also.. I'm a a fuel filter nazi.. If it runs fuel and has a piston, I put a filter on it. If you end up with 1/4" line and change your mind I can probably attempt to take a picture of what I did on mine if you'd like to see it. It's nothing special.
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Old 05-19-2014, 09:58 PM
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Quote:
Originally Posted by Bob95065 View Post
I have a 1000 that I used since new. I practically grew up on it because I did yard work and maintenance for a neighbor who gave it to me about 10 years ago. Anyway, it has a 90° valve at the base of the tank. The valve has a small red handle and is original to the tractor. From the serial # it was made in August 1977.
My '79 1450 has the same 90 degree red handle. I hate having to loosen the side shield to turn the gas on and off every time, not to mention that it hits the foam of the firewall as well.

Bill
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Old 05-19-2014, 10:08 PM
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Quote:
Originally Posted by Berwil View Post
My '79 1450 has the same 90 degree red handle. I hate having to loosen the side shield to turn the gas on and off every time, not to mention that it hits the foam of the firewall as well.

Bill
My 1650 too has this shutoff. I have not worried about shutting it off for two years with no ill effects.
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