Stuck carb float (inlet needle valve closed).
SOURCE: Honda 5.5 HP starts & dies
had the same problem with my Honda engined mower. you can't see it easily, but there is a very fine screen in the outlet of the fuel tank that gets blocked and fuel will not pass thru it fast enough to refill carb. remove tank and pour fuel in another container . Use a flexible plastic tube in the outlet or make a small wire hook to penetrate the screen,or preferably, remove it. confirm that fuel flows freely thru it, remove any debris, and reassemble. Change spark plug, add fresh fuel,and test. best of luck!!!! Ray
SOURCE: AH520 Tecumseh engine will not start; no spark to
I would recommend a serious carburetor cleaning or even installing a new rebuild kit after the machine setting up for so long. The spark problem must be checked for either the (magneto to flywheel air gap) or the condition of the electrical points and condensor on it (if this older model has them)
SOURCE: yard machine 139cc ohv. wont turn over. cleaned
Clean the brass bolt very well that holds the bowl on the carb. Pay very close attention as their are some very small holes in the smooth part of the bolt near the top, as well as the bottom. Use NO metal objects to clean this bolt.It is the main jet of the carburetor also. Once cleaned properly, your fuel flow into carburetor and engine should be restored.
SOURCE: My mtd(11A-54MC552) lawnmower won't start. changed:
The Flywheel has a brake and switch assembly on that is item 8 of this link: http://www.ereplacementparts.com/mtd-11a54mc006-2009-push-walkbehind-mower-parts-c-20039_20100_133234_21459.html#part_343018
The switch is made or unmade by the position of the user safety bar on the handle. When the cable between the handle and the flywheel safety brake wears or needs adjustment the safety switch continually grounds the ignition so there is no spark. You may have to adjust the user safety bar cable at the engine flywheel brake switch area by losending the mount screw and moving the cable jacket further away from the switch. Then re-tighten the mounting screw.
If this is the first start of the season you may have to remove the carb float bowl as shown on the bottom of item 14 the above link to clean out the jet orifice in the threaded area of the carb. Make sure you remove all debris in the carb float bowl area. You should also have fuel flow anytime the float is positioned below horizontal.
If none of the above corrects the problem respond here and I will help you.
Thanks for choosing FixYa,
Kelly
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