AHS 1,550 #1 Posted August 13 Brand new to me! I just replaced the fuel pump (and its pumping fuel, cleaned the carb), started for 10 minutes then i shut it off…..wait two weeks…. It wont start again, and its pumping fuel from the pump and. It’s filling up the carb bowl, but not getting to the spark plug. I cleaned the carb again, and it’s spotless! What should i do? Replace the head gasket? Replace the carb? BTW.. The story ive heard of the tractor was a very easy life, it was bangor savings banks long ago: it mowed. Their grass and snowblowed their sidewalks… even though it got 0000 on the meter, i have a feeling it’s got less than 300 hours. Then the tractor sat in a field for the rest of the years… and faded!! Share this post Link to post Share on other sites
squonk 43,939 #2 Posted August 13 Is the choke closing all the way? Sat in a field. Mice get in the shroud and chew on the coil wire reducing spark? 1 Share this post Link to post Share on other sites
nylyon-(Admin) 8,000 #3 Posted August 13 Will it fire if you shoot a little brake clean in the carb? 2 Share this post Link to post Share on other sites
clueless 3,263 #4 Posted August 13 There is cleaning the carb, then there is CLEANING the carb, what did you actually do? 2 1 Share this post Link to post Share on other sites
wallfish 18,241 #5 Posted August 13 If it fires with a squirt, it's fuel related. If not, it's spark/ignition related 2 Share this post Link to post Share on other sites
AHS 1,550 #6 Posted August 13 7 hours ago, wallfish said: If it fires with a squirt, it's fuel related. If not, it's spark/ignition related Ok, it fires with fuel. So, carb? Share this post Link to post Share on other sites
AHS 1,550 #7 Posted August 13 7 hours ago, clueless said: There is cleaning the carb, then there is CLEANING the carb, what did you actually do? Cleaned the carb good w/ carb cleaner. Took out the jets and sprayed thru the passage. I hate to buy a carb off ebay, (isavetractors tractors is all out of them!) Share this post Link to post Share on other sites
AHS 1,550 #8 Posted August 13 8 hours ago, nylyon said: Will it fire if you shoot a little brake clean in the carb? I haven’t tried thru the carb, but in the head it will. I’ll check that this morning. Share this post Link to post Share on other sites
Pullstart 67,042 #9 Posted August 13 Valve adjustment? Share this post Link to post Share on other sites
nylyon-(Admin) 8,000 #10 Posted August 13 If it’s running with the brake clean, then you have a fuel issue. Since you said that the fuel pump is pumping to the carb AND that the bowl is filling, then I would assume there is a blockage inside of the carb. When you cleaned it, did you run small wire through the passage ways and blow out with compressed air? 3 Share this post Link to post Share on other sites
peter lena 9,309 #11 Posted August 13 @AHS regularly refer to running in an unknown engine engine , on a seperate callon of heavily treated fresh gas , that eliminates the possible fuel hose break down , also add a fuel check valve , just under carb area , so you can see standing fuel held to carb , with clear line , done a number of fuel related issues , usually debris loaded tank , ethanol destroying any and all rubber hose , if you don't remove / change the fuel hose , the problem remains . my own experience with fuel issues ,is to eliminate all old hose / replace with new ,clean tank add a couple ounces of STA BIL to a full tank , and stop the hose break down , also have a filter close to tank ,and another close to carb , so you can see what's going on . have this change over , set up on all my small engines , same result , instant starts , and no debris in filters . at each tank top off , add an ounce or 2 of stabil , make a complete change to existing set up , pete 1 Share this post Link to post Share on other sites
953 nut 60,348 #12 Posted August 13 5 hours ago, AHS said: Took out the jets and sprayed thru the passage Did you soak the High Speed Needle and make sure its passages are clean? It is actually a tube with holes at the top, middle, and bottom which determines the amount of fuel by comparing the atmospheric pressure to the pressure in the venturi. If it ain't right the fuel flow won't be either. @ebinmaine did a great job of documenting a proper carburetor rebuild. 4 1 Share this post Link to post Share on other sites
ebinmaine 72,986 #13 Posted August 13 13 minutes ago, 953 nut said: it ain't right I've been called this 3 Share this post Link to post Share on other sites
AHS 1,550 #14 Posted August 13 6 hours ago, Pullstart said: Valve adjustment? Im hoping not to have to make it to valve ajustment! Share this post Link to post Share on other sites
lynnmor 7,858 #15 Posted August 13 19 minutes ago, AHS said: Im hoping not to have to make it to valve ajustment! While I doubt that valve adjustment is the problem, it is a good idea to know that the valve clearance is correct so you don't burn a valve or have excessive wear. 1 Share this post Link to post Share on other sites
clueless 3,263 #16 Posted August 13 2 hours ago, 953 nut said: Did you soak the High Speed Needle and make sure its passages are clean? It is actually a tube with holes at the top, middle, and bottom which determines the amount of fuel by comparing the atmospheric pressure to the pressure in the venturi. If it ain't right the fuel flow won't be either. @ebinmaine did a great job of documenting a proper carburetor rebuild. 2 1 Share this post Link to post Share on other sites
AHS 1,550 #17 Posted August 13 So, my fuel pump isn’t working… i am done with fuel pumps! I have facet 60304 1-3psi on my 418. How about a facet 60304 on a 312? 3 Share this post Link to post Share on other sites
Racinbob 11,989 #18 Posted August 13 24 minutes ago, AHS said: So, my fuel pump isn’t working… i am done with fuel pumps! I have facet 60304 1-3psi on my 418. How about a facet 60304 on a 312? Good choice. There are many good ones out there. For my serious machines I've been using Mr. Gasket 42s pumps. The other have the cheapies but danged if they've haven't been working fine. They just go thump, thump, thump. The better ones have a nice whirr. Can't hear either with the engine running. 2 Share this post Link to post Share on other sites
AHS 1,550 #19 Posted August 14 Or an electric one from isavetractors? I don’t know how many psi they run…. Share this post Link to post Share on other sites
ebinmaine 72,986 #20 Posted August 14 9 minutes ago, AHS said: Or an electric one from isavetractors? I don’t know how many psi they run…. I have very little trust in his products. IMHO you're just as well off with a "jungle" piece. The Facet brand from Aircraft spruce is the best bet and best price. 2 Share this post Link to post Share on other sites