Retired Wrencher 5,459 #1 Posted June 26, 2023 (edited) I have this 12 hp Service engine that runs great for about 20 minutes, then slowly dies out no matter what I do. Video 1 running good for at least 20 minutes. Video #2 dying out. Any thoughts? Carb is totally rebuilt. HDV_0002.MP4 HDV_0003.MP4 Edited June 26, 2023 by Retired Wrencher Share this post Link to post Share on other sites
OoPEZoO 525 #2 Posted June 26, 2023 (edited) Is the fuel source properly vented so no vacuum is created? Not just tractor related, but I've run into it a few times where the vent cap gets clogged and it eventually chokes the motor out. On motorcycles it is obvious when you open the fuel filler and hear/feel a whoosh of air, but is less noticeable in tractors that use much less fuel. At least worth a check to rule it out. Edited June 26, 2023 by OoPEZoO 3 Share this post Link to post Share on other sites
8ntruck 7,012 #3 Posted June 26, 2023 Does it start right up after it dies out, or does it need to sit a while before it will start? Might be heat related? Share this post Link to post Share on other sites
Retired Wrencher 5,459 #4 Posted June 26, 2023 6 hours ago, 8ntruck said: Does it start right up after it dies out, or does it need to sit a while before it will start? Might be heat related? It will by choke but still runs rough. Share this post Link to post Share on other sites
ri702bill 8,327 #5 Posted June 26, 2023 (edited) 3 hours ago, Retired Wrencher said: It will by choke but still runs rough. Glad to see an inline spark checker. I assume it still "glows" after it dies and you try to restart?? If so - then to me it is not a bad coil issue... It does seem fuel related. How old are the fuel lines?? The fuel pump pulls fuel from the tank - try to bend a tight radius in the tank line by hand and check for any pesky microcracks that can allow air in - seen that before...! Those cracks do not leak fuel, but enough of them will let air in. Edited June 26, 2023 by ri702bill 1 Share this post Link to post Share on other sites
peter lena 8,631 #6 Posted June 26, 2023 @ri702bill agree on the carb issue , try running it on a seperate treated fuel jug , collective fuel tank debris , dirty filters , all ads up , also a hand over carb , might help out . fuel bowl probably has awnswer . pete 2 Share this post Link to post Share on other sites
ri702bill 8,327 #7 Posted June 26, 2023 21 minutes ago, peter lena said: fuel bowl probably has awnswer . pete Pete - you mean that the bottom of the bowl may be holding unwanted items in addition to gasoline.......? Share this post Link to post Share on other sites
Retired Wrencher 5,459 #8 Posted June 26, 2023 Well guys it that old adage. Do the simple things first. The gas cap not venting because it not original to the Raider 10 tank. Been running it all morning. The only thing is the cap leaks so that is what started the problem. So far . 3 Share this post Link to post Share on other sites
peter lena 8,631 #9 Posted June 26, 2023 yes , carb was rebuilt , should be able to take that out of the picture , if any of the fuel line related set up was not verified for clean , might get an imediate refill of debris / line berak down . having experienced that same result my self , thats why I go to a seperate , gallon jug to run it in on . engine sounds good , have a regular , recovery step that finds the issue . if it runs on that gallon issue free , its lines , filters , tank , pete Share this post Link to post Share on other sites
Retired Wrencher 5,459 #10 Posted June 26, 2023 Pete this was a on the shelf engine from a dealer so? But with the cap venting now works well so far. 2 Share this post Link to post Share on other sites
peter lena 8,631 #11 Posted June 27, 2023 @Retired Wrencher sounds like that was it , obviousely can,t duplicate your issue on line . rarely found anything to be a single , issue , usually a collective , run, test , try , that look has led me onto related steps , good for you . Share this post Link to post Share on other sites
