do not try to start or run the engine on a charger. The DC voltage from the charger is not "clean" voltage. There is noise in the DC voltage supply and this will mess up the ignition. Jump start it from a full charged battery, even with that, still do not use a charger. Also check your valve tappet clearance.
the intake valve might not be opening. try puting some gas right in the cylinders and see if it runs. if it does than thats most likely the problem. if it dosent do anything different than there has to be a problem with the spark or the timing of the spark
Looks and sounds like intake valve not opening,. As though you have too much compression. This will account for the dry spark plug. I am almost 100% certain that you have to adjust the intake valves so that you have the intake valves opening, or opening further
This was my thought too. I had a problem with the intake valve not closing, because the seat had come loose and was slightly hammered into the block. On the compression stroke it was pushing the fuel/air mix back to the carburetor and the plug remained dry. I fixed mine by using a Loctite product called Black Max, which is a rubberized, high-temperature super glue, to glue the seat back into place (bottomed out) and then readjusted the valve clearance. First I adjusted the valve clearance so that it was bottoming out the seat. Then disassembled, cleaned the seat and block with brake cleaner or electronic cleaner, then glued it, then reassembled it so the valve would hold it in place. Let it sit 24 hours to cure. Then adjust clearance again. Mine has lasted 3 mowing seasons so far. Gotta keep the grass clippings out of the cylinder cooling fins so these don't overheat, which is what causes this problem for Onans used in mower applications.
Is there fuel in the bowl? I doubt that engine can pull fuel uphill like that, move the tank up off the floor. These engines aren't timed engines, you line up the two marks on the crank and cam shaft and its timed.
HORSEFIXER I was just about to post timing issue glad you fixed it anyway you could help me locate parts I’ve got the same engine on my welder need a coil
I've been a mechanic for 35 years and I have heard more people say they have everything right. But unless you can bet your life on it , then u don't know. The two biggest problem words or I KNOW. BUT THEY WON'T BET THERE LIFE ON IT.
Na you don't need a battery just for a test idle it wouldn't hurt to plug one on anyhow doesn't matter if it's a dead one put your condenser on with the black side of your coil not the red side I had just got two used onan engines ones a gt 19.9 the other is a performer 18 xsl I am working on both but am working on the 18 and seen it does take only a condenser but no points when I got the engine it didn't have no condenser its missing the carburetor air filter and doesn't really need a gas pump the engine is just sitting on the table for now I might mount it to my old john Deere it'll fit for now all that the 18 does is crank over I've not checked for spark yet to cold and wet outside to fool with it so I put the engine up when I get back to it need to check the other piston and cover and clean that up
If your 100 percent your timing is correct and u have a working ignition system, then the fuel not getting to the cylinders has to be your problem. Tru looking down into the cylinders to see if u can see any sings of fuel. I myself have a 20 horsepower onan engine and I know they are a little hungry for fuel when cold. I noticed your not really spraying very much fuel into your carburetor. U mite also check to see if the gas your useing is good.
My 18 doesn't have no ignition key switch its just the engine it cranks over good hooked to the truck there's no battery none of that it's gonna fit nice on the old jd 110 instead of its old k181 engine I couldn't get a part for that speeds the engine up so I took it off that mower
Sounds to me as if there is a fuel delivery problem to the cylinders themselves. It also sounds like its hitting on only 1 cylinder. If the carburetor is wet with fuel, it is possible that there is a obstruction in the intake. I had this same problem with a 19.5 Briggs twin.
@@hunter7476 ? 2011 post and poster stated cam and fly wheel marks were lined up.A 5 year old post that then stated the timing marks were NOT on,and he didn't say weather this engine was a points ignition or a trigger timed engine(Electronic).WTF.HORSEFIXER?
That's the stator not a module. I know he has stated what the problem was but that's hard to believe without a new video update showing it idling. I think he connected the condenser up to the wrong side I just seen a manual picture of the condenser connected to the - minus side on the coil it doesn't go onto the red + side
Wow, really. If your trying to start an engine you need a good strong battery hooked into the system. Not some jimmy rigged battery charger. Your not getting sufficient volt/amps to the starter and ignition system
You’re a fuel pump you don’t run your in and out on the top there should be you’re in coming from the bottom from your fuel tank or wherever you’re getting your fuel from an out from the top to your carburetor. L O L.
