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Help: 8N fuel flow rate

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Barry / 50 8N

06-04-2003 03:42:26




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My 8N started dying out while mowing yesterday, only under a load. Fuel starvation
I believe. What is the normal flow rate to the carb? Steady flow thru the fuel line, or a fast drip? Just trying to figure if I need to drain the fuel tank and clean or take the carb apart?Anticipating gasoline dripping down my arm shortly in any case. Thanks




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Bruce (VA)

06-04-2003 12:34:00




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 Re: Help: 8N fuel flow rate in reply to Barry / 50 8N, 06-04-2003 03:42:26  
Just a thought.....if you're worried about restricting the flow, measure the flow speed w/ the second hand on your watch into a small can w/o the filter, then with the filter. Same rate = no problem. Having said that.....I'd be inclined to fix the cause of the problem (a rusty gas tank) than to fix the symptom (debris in the carb)



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Barry / 50 8N

06-04-2003 04:38:47




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 Re: Help: 8N fuel flow rate in reply to Barry / 50 8N, 06-04-2003 03:42:26  
Thanks All.
I'm off to drain the tank and the autoparts store for a replaceable large inline filter.
BTW Claus,
Sarcasm as well as outright abuse is all fair game, just as long as the information gained is rightious.Yours is always that. Thank you. Here in Vermont, " listen , ya dam fool", is perfectly acceptable.-lol



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tomny

06-04-2003 05:49:12




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 Re: Re: Help: 8N fuel flow rate in reply to Barry / 50 8N, 06-04-2003 04:38:47  
If you use rubber hose just be careful to keep it away from anything hot. Thats why I went back to steel line.



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Claus

06-04-2003 03:55:02




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 Re: Help: 8N fuel flow rate in reply to Barry / 50 8N, 06-04-2003 03:42:26  
I use a metal inline fuel filter...There are some that claim you cannot use an in-line filter with a gravity fed system...This is nonsense...I believe someone tried to use one of those little plastic in-line filters Craftsman uses on their B&S engines and had bad experience with it...Wrote to the forum of how they do not work...100 people read it, and now parrot that they do not work...Especially, if your tank has some crud or rust in it...Those 3 screens just don't cut it for me...
Happy Motoring
Claus

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Lee

06-04-2003 11:48:32




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 Re: Re: Help: 8N fuel flow rate in reply to Claus, 06-04-2003 03:55:02  
I remember reading that post about in-line filters and similar posts since then. I put a fresh in-line filter on my Jubilee and just go on about my business. I have one about like you described, Claus. I've used similar ones(for Ford cars mostly) on motorcycles, 4 wheelers, old lawnmowers and about anything with a crusty fuel tank that wasn't worth cleaning and sealing. If you hook one up to a fuel line the gas runs right through. It's not very restrictive at all. I figure if it'll deliver enough clean fuel for a big Ford V8 it'll surely feed one of these little 4 bangers.
Later, Lee

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Claus

06-04-2003 04:13:23




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 Re: Re: Help: 8N fuel flow rate in reply to Claus, 06-04-2003 03:55:02  
I need to add, that the filter I use is about 1.5 inches in diameter x about 3 inches in lenght. Do not expect to get good flow from some small cartridge...Throw it in the trash at the end of the year and replace it...if you have crud in the tank...and you will be good for another season...I had a steel tank on my Chris Craft with a lot of rust in it....with an updraft carb....I would be tooling along....and all of a sudden the engine would conk out....I would have to take the carb apart on a shaking boat...hoping not to loose any parts...otherwise I would need a tow...clean out the rust particles,,,,then I wised up and put an in-line filter in....Problem solved....
Happy Motoring
Claus

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Ole Henry (Va)

06-04-2003 04:07:41




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 Re: Re: Help: 8N fuel flow rate in reply to Claus, 06-04-2003 03:55:02  
I also have an in-line filter on my 51 - only been on there since I bought the tractor 14 years ago.

I didn't know you couldn't use them. Recon I ought to take it off?...naaa ole boy might run to fast.

JA



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Claus

06-04-2003 04:18:15




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 Re: Re: Re: Help: 8N fuel flow rate in reply to Ole Henry (Va), 06-04-2003 04:07:41  
Yes, I think you should take it off...After 14 years, you should replace it with a new one...Filters are not made to last forever...We do not leave oil or air filters on for 14 years...You must have a clean tank....
Happy Motoring
Claus



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MikeC

06-04-2003 03:50:36




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 Re: Help: 8N fuel flow rate in reply to Barry / 50 8N, 06-04-2003 03:42:26  
When you remove the fuel line the fuel flow should be a steady stream, about the same as an old man taking a leak. Filters are at the top of the valve under the tank and at the elbow that goes into the carburetor.

I'd also keep in mine that the front mount coil or ignition switch can be time/heat related failures. Runs 10 minutes and dies out-ignition switch. Runs 45 minutes and dies out-front mount coil.

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JK TN

06-05-2003 12:39:59




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 Re: Re: Help: 8N fuel flow rate in reply to MikeC, 06-04-2003 03:50:36  
What if the old man's inline filter is blocked? Then what?



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tomny

06-04-2003 04:25:28




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 Re: Re: Help: 8N fuel flow rate in reply to MikeC, 06-04-2003 03:50:36  
There are 3 screens 1. in the tank above the shut off valve 2. above the bowl below the shut off valve and 3. in the elbow at the end of the fuel line.

I had the same problem last weekend. When I check the flow it was steady but not full steam. Had to drain the tank and found lint an the top of the screen. Cleaned it and had a full stream after. By full I mean equal to the inside diameter of the line and straight down not dragging to one side

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