mikemc53 10 #1 Posted August 3, 2018 Just got a 416H from my son-in-law that he's been holding for three years waiting for me to make room for it. It is pretty rough but it runs and was free. Cut some grass with it and it runs really strong and cuts pretty well. Hard to start and spits gas through the carb when doing it but this morning it started up easy and went to cutting. Got part way through the lawn and it sputtered and stopped, like it was out of gas. I had just filled it so that is not the case but I will need to figure out what it is. In the mean-time, if I don't get it running I'll want to pull it back to the barn. I'm not familiar with this hydro unit or where the relief valve might be to allow me to push or pull it. I believe it's an Eaton unit. Any help appreciated Share this post Link to post Share on other sites
pfrederi 17,125 #2 Posted August 3, 2018 (edited) No tow valves on Eatons.. But only go a short distance and very slowly...you may hear some clicking that is normal. Edited August 3, 2018 by pfrederi 2 Share this post Link to post Share on other sites
WHX?? 46,690 #3 Posted August 3, 2018 52 minutes ago, pfrederi said: very slowly Yes very slowly, if towing use a creeper gear. If the wheels want to lock up you are going too fast, let it set for a couple minutes. Sounds like you just need a fuel system cleaning? 1 Share this post Link to post Share on other sites
KC9KAS 4,741 #4 Posted August 3, 2018 I just read in a manual for a 518 H (1100 Eaton) that it can be pushed/pulled easier if you put the motion control lever all the way to "fast forward". 1 Share this post Link to post Share on other sites
mikemc53 10 #5 Posted August 3, 2018 Thanks guys. Got it towed...very slowly. It worked pretty well. I believe it might be the fuel pump. My son-in-law replaced the original with an aftermarket that didn't really seem to be right. It is in the wrong location, seemingly a bit far from the tank. It was pumping really hard before and there seemed to be too much fuel, initially. It is now not pumping at all. When replacing it does anyone know where the original went and maybe what to replace it with? Also is there a recommended distance from the tank (or the carb) that it needs to be? Share this post Link to post Share on other sites
WHX?? 46,690 #6 Posted August 3, 2018 (edited) Some where in this computer I have a link to the OEM pumps but a lot of the fellas are going to electric ones. The OEM should have been mounted just above the oil filter on the shroud. A pulse line from the pump to the crankcase through a hole in the shroud. Pics are in order here, see if I can't find them. fuel pump circled in red https://www.ebay.com/itm/Vacuum-Fuel-Pump-For-149-1982-149-1544-149-2187-Cummins-Onan-Generator-Welder/282742282069?epid=1776923353&hash=item41d4c0d755%3Ag%3AON8AAOSwCMFaE~0A&_sacat=0&_nkw=onan+fuel+pump&_from=R40&rt=nc&_trksid=p2060353.m570.l1311.R1.TR6.TRC2.A0.H0.Xonan+fuel+pump.TRS0 Better One You will find more info in the manuals if you don't already have them. Edited August 3, 2018 by WHX20 Share this post Link to post Share on other sites
Tach-a-matic 357 #7 Posted August 3, 2018 (edited) disconnect the fuel line in between the pulse pump and fuel filter and crank the engine If there is fuel then check the carb bowl for fuel- the float could be stuck closed (rare to be stuck closed but I have seen this happen) If there is fuel in the bowl check for spark - it could be an interlock or ignition issue If theres spark then its time to take the carb apart. After 3 years it could be pretty bad in the there! . Edited August 3, 2018 by Tach-a-matic 1 Share this post Link to post Share on other sites
mikemc53 10 #8 Posted August 3, 2018 They had actually replaced the fuel pump with an electric one and it has stopped working. I am going to go back to a mechanical, if at all possible. My son-in-law would run it occasionally to keep things honest but there is a lot that needs to be done to clean it up. 1 Share this post Link to post Share on other sites
953 nut 51,507 #9 Posted August 3, 2018 9 minutes ago, mikemc53 said: replaced the fuel pump with an electric one and it has stopped working. Fuses and wiring all good? By stopped working do you mean it is running but not pumping or not running? 5 hours ago, mikemc53 said: this morning it started up easy and went to cutting. Got part way through the lawn and it sputtered and stopped, like it was out of gas. I had just filled it so that is not the case but I will need to figure out what it is. If the vent on the gas cap is plugged the fuel pump will remove gas from the tank until it creates a slight vacuum in the tank that the fuel pump can not overcome. Share this post Link to post Share on other sites
WVHillbilly520H 10,369 #10 Posted August 3, 2018 I use the aftermarket eBay/Amazon $20 version of the OE Onan pulse pumps, so far so good , now if it's a Kohler there are rebuild kits at well as aftermarket ones as well, Jeff. Share this post Link to post Share on other sites
mikemc53 10 #11 Posted August 4, 2018 So the fuel pump (electric) is shot. Will not pump with power to it, at all. It was a replacement and someone had put it right over the spot where the pulse pump was. I haven't decided which way to go on replacement so I have a few questions. The pump that just died appeared to have been wired direct to the ignition - no fuse. It has, as does most electric pumps, one inlet and one outlet. If I replace it with an electric I will likely put it right where this one was but I will fuse the line. If I go with a pulse pump I am a little confused. I have seen them online and they seem to have two inlets and two outlets - not sure what to do with that. Also, the hole in the cover that goes to the crankcase, what would fit in there? I have worked on a smaller mechanical fuel pump on the C-81 but not familiar with these double line pumps. Share this post Link to post Share on other sites
pfrederi 17,125 #12 Posted August 4, 2018 The impluse pump has a fuel in fuel out and a line to the crankcase.The crankcase line carries the fluctuating crankcase air pressure to the pump diaphragm to make it work . The hole was probably for that line there wold be a fitting somewhere on the crankcase the line would attach to. (Hopefully plugged) Share this post Link to post Share on other sites
WVHillbilly520H 10,369 #13 Posted August 5, 2018 On the Onan, they look as though to have dual inlet/outlet but in reality they don't and as mentioned above on, the back of the block is the vacuum port for the crankcase to "pulse" the Reed valve to actuate the fuel flow, and Onan also has an electric version as well, Jeff. Share this post Link to post Share on other sites
mikemc53 10 #14 Posted August 27, 2018 How do I get to crankcase line? Basically what needs to come off? I can't figure how to get the "cover" off that surrounds the flywheel. I removed some bolts but it isn't budging. Thoughts? Share this post Link to post Share on other sites