JerryLook 78 #1 Posted 4 hours ago I have a 416H with the Onan P216. I got this tractor with about 500 hours on it, and ever since I’ve owned it I’ve had to run it at about half choke. Otherwise it had a surge that seems to be common with the Onans with bad intake seals. I’ve read about the intake needing to be resealed and tucked that away into memory for another day. Ever since the fall the tractor has been running worse and worse. I would be using it and it would randomly die. Other times I use it and it start surging. At this point it runs terrible. The choke has to be all the way out, and it surges/hunts for an idle all the way from almost dying to the correct throttle setting. Basically it’s unusable right now. Things I’ve replaced recently to try to fix this. I’ve changed parts once at a time to see if the problem resolves…. -Fuel lines from fuel tank to carb -Fuel pump -Fuel pump impulse line -Fuel filter -Air filter -Spark plugs -Resealed intake manifold and replaced gaskets -New carb Since it has to have the choke all the way out I assume it’s a fuel problem. I can see fuel pulse in the filter, and I’ve taken off the line at the carb and can see fuel pumping from there. it does seem to go away completely at times. Although more often than not it runs terrible like right now. Any ideas? Share this post Link to post Share on other sites
JerryLook 78 #2 Posted 3 hours ago Could it be a governor issue? Share this post Link to post Share on other sites
Wishin4a416 2,406 #3 Posted 2 hours ago I had an 18 on a JD that did that and ended up being a soft plug type of thing. I cant remember the correct name of it. It got blown out somehow. Ran good after replaced. Welch plug???? Share this post Link to post Share on other sites
JerryLook 78 #4 Posted 2 hours ago The Welch plug is on the carb right? I’ve replaced the carb but still have the old one. I wish they were easier to swap around on p216. It sucks having to remove the intake to remove the carb Share this post Link to post Share on other sites
JerryLook 78 #5 Posted 2 hours ago I’ve been doing some reading, and one thing I didn’t do is check the screen at the bottom of the fuel tank. I am getting fuel flow at the filter, but maybe not enough? With the clear filter I can see the gas pulse every time the engine turns over. Share this post Link to post Share on other sites
lynnmor 8,392 #6 Posted 2 hours ago Have you checked the compression? Share this post Link to post Share on other sites
JerryLook 78 #7 Posted 1 hour ago I haven’t checked compression but I can. Share this post Link to post Share on other sites
