Lars 526 #1 Posted March 14, 2013 Hey guys.. it been over a week since i used my 312.. and it was hard to start dint get any fuel... took the airhose and blow in the tank it fired up.. and runs like normal.. is the fuel pump starting to get crap..???? Lars.. Share this post Link to post Share on other sites
woodchuckfarmer 333 #2 Posted March 14, 2013 Could have dirt in it, got a fuel filter before the pump . Shut the tank valve next time when your done with it so the fuel cant drain back into the tank and it maybe needing a rebuild. TT posted a check valve to put right after the the tank valve. But i dont know where he got them.....hope ive helped you ....Wayne Share this post Link to post Share on other sites
GlenPettit 1,717 #3 Posted March 14, 2013 This works sometimes: There is a small screen (filter) very low in the bottom of the fuel tank that tends to get easily plugged up. It's located directly below the cap, it's easy brush off and then to drop a small plastic hose down there and "suck-up" the dirt and crud that may be around it and plugging it. Glen Share this post Link to post Share on other sites
953 nut 60,282 #4 Posted March 15, 2013 Your Fuel cap has a vent on it, last summer I ran into this problem, removed the cap and it ran fine. The new cap solved my problem. If you run into the problem again just try removing the cap to see if it is the cause. Hope this helps. Share this post Link to post Share on other sites
Lars 526 #5 Posted March 15, 2013 (edited) Could have dirt in it, got a fuel filter before the pump . Shut the tank valve next time when your done with it so the fuel cant drain back into the tank and it maybe needing a rebuild. TT posted a check valve to put right after the the tank valve. But i dont know where he got them.....hope ive helped you ....Wayne Ok thanks Wayne i will try to shut it off.. This works sometimes: There is a small screen (filter) very low in the bottom of the fuel tank that tends to get easily plugged up. It's located directly below the cap, it's easy brush off and then to drop a small plastic hose down there and "suck-up" the dirt and crud that may be around it and plugging it. Glen Right Glen.. ill need to have a look into that to. to see if it is just an easy fix to make it start easy again because it run's like a champ when it starts.. lol thanks Your Fuel cap has a vent on it, last summer I ran into this problem, removed the cap and it ran fine. The new cap solved my problem. If you run into the problem again just try removing the cap to see if it is the cause. Hope this helps. Ok.. the 312 got a new fuel cap before this winter.. but the tractor is running good when it first fires up.. Thanks Edited March 15, 2013 by Knusern Share this post Link to post Share on other sites
Wheel-N-It 2,976 #6 Posted March 15, 2013 Lars, your problem could be any of the above. To get a better idea of what the problem may be, disconnect the fuel line from the inlet side of the fuel pump. Then lower the line below the height of the fuel tank. If fuel does not flow very freely, then you have a blockage in the fuel supply system. If fuel flows freely then you have a problem somewhere betweem the fuel pump and the carb. If the fuel is flowing free, remove the fuel bowl and give it a good cleaning (till the inside shines). Spray the inside of the carb and all the passages with brake cleaner (wear safety glasses). Put it all back together and see if it starts easier. If that does not correct the problem, then you will have to check the fuel pump. To do that you will need to remove the line where it connects to the carb. Also remove the spark plug wire. Crank the engine over and see if fuel is being pumped from the fuel pump. If not, then your fuel pump will need to be replaced. If you are having a problem with the fuel supply system, I recommend as maintenance to go ahead and replace the entire 6' (six feet) of fuel line and add a filter. To do that the easy way, you will need to remove the seat and fenders. Van Share this post Link to post Share on other sites
meadowfield 2,756 #7 Posted March 15, 2013 I just knew when I read the title it would be a horse with a rear under seat tank! All ours when left stood for weeks take some time to draw fuel to the pump. I have an inline filter and you can see the draw quite weak if the tank is not full. Even with a pump rebuild it can be slow to work. The pumps are rubbish when sucking air, it can be really hard to get them primed too.... Share this post Link to post Share on other sites
Stormin 9,985 #8 Posted March 15, 2013 My C-125 doesn't want to start if not run for a while. Where the fuel line joins the carb, there is a small bolt that I can remove and inject fuel with a syringe. Two syringes full and away she goes. Share this post Link to post Share on other sites
wheeledhorseman 579 #9 Posted March 15, 2013 C-125 with fuel injection - neat trick! 1 Share this post Link to post Share on other sites
Sparky-(Admin) 23,266 #10 Posted March 15, 2013 I'm sure theres a good reason why it wouldn't work and I can take the ribbing so bring it on .....but I was reading this and was wondering why we cant stick a squeeze bulb in the fuel line like an outboard boat motor has? I think they are directional so would it also serve as an anti-siphon as well? Mike........... 2 Share this post Link to post Share on other sites
qd-16 14 #11 Posted March 15, 2013 I'm sure theres a good reason why it wouldn't work and I can take the ribbing so bring it on .....but I was reading this and was wondering why we cant stick a squeeze bulb in the fuel line like an outboard boat motor has? I think they are directional so would it also serve as an anti-siphon as well? Mike........... I don't see why this wouldn't work. Share this post Link to post Share on other sites
Lars 526 #12 Posted March 16, 2013 I'm sure theres a good reason why it wouldn't work and I can take the ribbing so bring it on .....but I was reading this and was wondering why we cant stick a squeeze bulb in the fuel line like an outboard boat motor has? I think they are directional so would it also serve as an anti-siphon as well? Mike........... Thanks for all the replays and ideas guys.. and that squeeze bulb dose work really good.. my brother have it on a c 165.. he had to add that to it when he put on that onan engine.. but im going to check out on on saturday..going to drain the tank and put new line and filter etc etc on it... and hope it help's:) Lars Share this post Link to post Share on other sites
sorekiwi 761 #13 Posted March 16, 2013 A quick tip on replacing the fuel line on the 3/4/5 00 series tractors: Cut the hex off a 5/16 bolt to produce a piece of 5/16" round. Disconnect the old fuel line at the tank and jam the 5/16 bolt into the end of it. Jam a new piece of 1/4" fuel line onto the other end of the bolt. Now you can just pull the old line out and in the process pull the new piece of line through and into place. No removing the seat or the fender pan. I've done this 3 times now, and its worked every time. 4 Share this post Link to post Share on other sites
can whlvr 994 #14 Posted March 16, 2013 i tried a shut off right beside the pump with and it didnt help,gonna try thr primer bulb Share this post Link to post Share on other sites
