| Fuel feed issue | |
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+3tinkering bob AllisKidD21 George Gooding 7 posters |
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George Gooding Member
Age : 50 Join date : 2018-06-15 Points : 2451 Posts : 133 Location : Joplin Missouri
| Subject: Fuel feed issue June 25th 2018, 6:34 pm | |
| 18 HP opposed twin 3 screw fuel pump won't suck up the fuel, it was running OK couple weeks ago then a few days later I tried to start it, wouldn't draw fuel up to the carb you could see it gurgling in the filter so I took the pump apart and found one of the diaphragms was torn at one of the screw points, so I got a rebuild kit for it today, cleaned everything inside and out of the pump and carb, set bot mixture screws 1 1/2 turns out from lightly seated no it won't draw any fuel through the filter, it does run as long as spraying starting fluid or gas directly into the carb | |
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AllisKidD21 Moderator
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Age : 25 Join date : 2016-07-10 Points : 8539 Posts : 5190 Location : Ontario Canada
| Subject: Re: Fuel feed issue June 25th 2018, 6:56 pm | |
| Hmmm, is the vaccuum line for the pump hooked back up correctly? Springs back in place for the diaphragm? "This'll either wake you up or put you to sleep forever!"- Red Green "Whatever you do you should do right, even if it's something wrong." - Hank Hill - MTD Off-Road Build - Ford LT 110 Off-Road Build - Craftsman GT 6000 Off-Road Build - Sears LT11 Rat Rod Build *2019 Build-Off Winner!* Garden Tractor Collection: Allis B-110 x2, 710, 716, & 410 - Wheel Horse 655, 953 & 500 Special - Case 444 - Bolens Versamatic, G10 & 1668 Diesel Swapped - Cub 106, 124 & 1000/149 Frankentractor - Ford 120, LGT 125 & 145 - White 1650 Yard Boss - Moto Mower 710-100 | |
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George Gooding Member
Age : 50 Join date : 2018-06-15 Points : 2451 Posts : 133 Location : Joplin Missouri
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AllisKidD21 Moderator
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Age : 25 Join date : 2016-07-10 Points : 8539 Posts : 5190 Location : Ontario Canada
| Subject: Re: Fuel feed issue June 25th 2018, 7:58 pm | |
| Is there possibly a clogged fuel line? Like maybe between the filter and the carb or something. "This'll either wake you up or put you to sleep forever!"- Red Green "Whatever you do you should do right, even if it's something wrong." - Hank Hill - MTD Off-Road Build - Ford LT 110 Off-Road Build - Craftsman GT 6000 Off-Road Build - Sears LT11 Rat Rod Build *2019 Build-Off Winner!* Garden Tractor Collection: Allis B-110 x2, 710, 716, & 410 - Wheel Horse 655, 953 & 500 Special - Case 444 - Bolens Versamatic, G10 & 1668 Diesel Swapped - Cub 106, 124 & 1000/149 Frankentractor - Ford 120, LGT 125 & 145 - White 1650 Yard Boss - Moto Mower 710-100 | |
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tinkering bob Member
Join date : 2018-02-27 Points : 2450 Posts : 34
| Subject: Re: Fuel feed issue June 25th 2018, 8:14 pm | |
| or also I've had happen where the fuel line gets a pin hole in it and it looks like it's pumping but it's not and when you try to re prime it she's a no go | |
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George Gooding Member
Age : 50 Join date : 2018-06-15 Points : 2451 Posts : 133 Location : Joplin Missouri
| Subject: Re: Fuel feed issue June 25th 2018, 8:19 pm | |
| All new fuel lines, filter and shutoff valve. And yes the valve was open and no the fuel wasn't in backwards | |
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George Gooding Member
Age : 50 Join date : 2018-06-15 Points : 2451 Posts : 133 Location : Joplin Missouri
| Subject: Re: Fuel feed issue June 25th 2018, 9:03 pm | |
| If I remember correctly, seems like one of the adjustment screws was backed out around 6-8 turns from lightly seated. Is this common with these oppies? It was this one | |
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tinkering bob Member
Join date : 2018-02-27 Points : 2450 Posts : 34
| Subject: Re: Fuel feed issue June 25th 2018, 9:09 pm | |
| it varies from motor to motor and carb to carb but as a perfect example I had 2 5 hp one lung briggs one had the main jet backed out three turns the other needed 5 1/2 best advice is set it back where it ran before and go from there | |
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Double W Cross Ranch Veteran Member
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Age : 20 Join date : 2017-06-09 Points : 5444 Posts : 2640 Location : Literally Nowhere, Texas
| Subject: Re: Fuel feed issue June 25th 2018, 9:09 pm | |
| - Spoiler:
No offense, but the mods prefer you to not multipost like that. Just didn't want you to get in trouble.
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George Gooding Member
Age : 50 Join date : 2018-06-15 Points : 2451 Posts : 133 Location : Joplin Missouri
| Subject: Re: Fuel feed issue June 25th 2018, 9:13 pm | |
| Don't mean to but didn't realize didn't have a pic of it in the phone | |
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AllisKidD21 Moderator
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Age : 25 Join date : 2016-07-10 Points : 8539 Posts : 5190 Location : Ontario Canada
| Subject: Re: Fuel feed issue June 25th 2018, 9:17 pm | |
| That mixture screw in the picture is the main fuel jet screw. Altough the adjustment of the screws shouldn't affect the fuel pump, it will still pump fuel regardless of the settings. On a side note, where do you have that line on the bottom of the pump going to?
-Just so you know the lower port is the vaccum port, and the one on the side is the fuel inlet port. "This'll either wake you up or put you to sleep forever!"- Red Green "Whatever you do you should do right, even if it's something wrong." - Hank Hill - MTD Off-Road Build - Ford LT 110 Off-Road Build - Craftsman GT 6000 Off-Road Build - Sears LT11 Rat Rod Build *2019 Build-Off Winner!* Garden Tractor Collection: Allis B-110 x2, 710, 716, & 410 - Wheel Horse 655, 953 & 500 Special - Case 444 - Bolens Versamatic, G10 & 1668 Diesel Swapped - Cub 106, 124 & 1000/149 Frankentractor - Ford 120, LGT 125 & 145 - White 1650 Yard Boss - Moto Mower 710-100 | |
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George Gooding Member
Age : 50 Join date : 2018-06-15 Points : 2451 Posts : 133 Location : Joplin Missouri
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AllisKidD21 Moderator
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Age : 25 Join date : 2016-07-10 Points : 8539 Posts : 5190 Location : Ontario Canada
| Subject: Re: Fuel feed issue June 25th 2018, 9:36 pm | |
| Oh really? It sorta looks like the fuel line is hooked up to the bottom port, haha. "This'll either wake you up or put you to sleep forever!"- Red Green "Whatever you do you should do right, even if it's something wrong." - Hank Hill - MTD Off-Road Build - Ford LT 110 Off-Road Build - Craftsman GT 6000 Off-Road Build - Sears LT11 Rat Rod Build *2019 Build-Off Winner!* Garden Tractor Collection: Allis B-110 x2, 710, 716, & 410 - Wheel Horse 655, 953 & 500 Special - Case 444 - Bolens Versamatic, G10 & 1668 Diesel Swapped - Cub 106, 124 & 1000/149 Frankentractor - Ford 120, LGT 125 & 145 - White 1650 Yard Boss - Moto Mower 710-100 | |
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Crazy_Carl Veteran Member
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Age : 35 Join date : 2017-10-30 Points : 5285 Posts : 2561 Location : Rochester, New York
| Subject: Re: Fuel feed issue June 25th 2018, 9:38 pm | |
| needle valve stuck closed in the float bowl? very unlikely but it's an idea | |
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George Gooding Member
Age : 50 Join date : 2018-06-15 Points : 2451 Posts : 133 Location : Joplin Missouri
| Subject: Re: Fuel feed issue June 25th 2018, 9:39 pm | |
| Thanks, I'll be sure to double check that in the morning. | |
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tinkering bob Member
Join date : 2018-02-27 Points : 2450 Posts : 34
| Subject: Re: Fuel feed issue June 25th 2018, 9:41 pm | |
| usually a tap from a ratchet will free it up if you do it while cranking also it's been a really long time since I had an oppy in my life is it possible there's more than one way the internals can go together I know the carb on my chainsaw is diaphragm run and it can go together a half dozen ways or better | |
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CraftsmanQuad19 Veteran Member
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Age : 24 Join date : 2016-04-12 Points : 5920 Posts : 2632 Location : Indiana
| Subject: Re: Fuel feed issue June 25th 2018, 10:54 pm | |
| Did you fill up the bowl with gas during reassembly? Just pull the top off while it’s all still in the tractor and dump about half cup to a cup of fuel in the bowl to prime everything | |
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RichieRichOverdrive Moderator
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Age : 22 Join date : 2016-10-29 Points : 7113 Posts : 3962 Location : Lewisburg, KY
| Subject: Re: Fuel feed issue June 25th 2018, 11:05 pm | |
| Take the fuel pump off and make sure none of the little check flaps are folded over. I've had that happen and prevent it from pulling fuel.
And this sounds really dumb, but suck on the fuel inlet(with the carb as dry as possible). If you can pull any air through, then you have a problem with the diaphragm.
Another thing to consider is that the plastic fuel pump body warped slightly and isn't sealing. I had it happen once. | |
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George Gooding Member
Age : 50 Join date : 2018-06-15 Points : 2451 Posts : 133 Location : Joplin Missouri
| Subject: Re: Fuel feed issue June 25th 2018, 11:15 pm | |
| Sucked on the line earlier, no give, diaphragms are good
Thanks CraftsmanQuad didn't think of that, will do that tomorrow | |
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RichieRichOverdrive Moderator
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Age : 22 Join date : 2016-10-29 Points : 7113 Posts : 3962 Location : Lewisburg, KY
| Subject: Re: Fuel feed issue June 25th 2018, 11:36 pm | |
| Make sure your pulse line isn't cracked or leaking too.
I assume you're working on your MTD, is the valve on the bottom of the tank open? I noticed my tank has a shutoff valve there. | |
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George Gooding Member
Age : 50 Join date : 2018-06-15 Points : 2451 Posts : 133 Location : Joplin Missouri
| Subject: Re: Fuel feed issue June 25th 2018, 11:40 pm | |
| Yes the valve is open, are you talking about the line going to the crankcase? | |
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RichieRichOverdrive Moderator
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Age : 22 Join date : 2016-10-29 Points : 7113 Posts : 3962 Location : Lewisburg, KY
| Subject: Re: Fuel feed issue June 25th 2018, 11:43 pm | |
| Yep. That's the one that actually provides power to the pump | |
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George Gooding Member
Age : 50 Join date : 2018-06-15 Points : 2451 Posts : 133 Location : Joplin Missouri
| Subject: Re: Fuel feed issue June 26th 2018, 9:16 am | |
| Yep, fuel and crankcase lines were hooked up properly | |
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George Gooding Member
Age : 50 Join date : 2018-06-15 Points : 2451 Posts : 133 Location : Joplin Missouri
| Subject: Re: Fuel feed issue June 27th 2018, 2:49 pm | |
| Got her running today, adjusted both high and low idle mixture screws out, put some go juice in the float bowl and blew out the fuel line. It only runs on half choke and pops pretty bad until it's good and warm then smooths out some, still pops just not as bad | |
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Crazy_Carl Veteran Member
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Age : 35 Join date : 2017-10-30 Points : 5285 Posts : 2561 Location : Rochester, New York
| Subject: Re: Fuel feed issue June 27th 2018, 3:01 pm | |
| Sounds like you need another carb cleaning. | |
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| Fuel feed issue | |
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