Caish Posted May 15, 2011 Posted May 15, 2011 I noticed yesterday, that even though the 920 was mowing great, it smelled like it was running a bit rich. Where can I find a howto or something explaining adjusting the fuel/air ratio on these?
D-17_Dave Posted May 15, 2011 Posted May 15, 2011 Any such adjustment is going to be internal of the injector pump. Imposible to do without the proper test equipment. You can check the air filter for plugging. If this is OK then I would recomend removing the injectors and pumps and take them to a reputable diesel shop for cleaning and setting.
Caish Posted May 16, 2011 Author Posted May 16, 2011 quote:Originally posted by D-17_Dave Any such adjustment is going to be internal of the injector pump. Imposible to do without the proper test equipment. You can check the air filter for plugging. If this is OK then I would recomend removing the injectors and pumps and take them to a reputable diesel shop for cleaning and setting. Air Filter cleaned, New Fuel Filter, Clean Diesel, No water in the fuel, Cooling fins cleaned, check, check, check, check, and checked. :D These engines will act like they're over heating with just a little water in the fuel, and they take forever to get the air out of the system once you open it too. Thanks, I'll call a local shop that did my Thermoking pump rebuild and see if they want to tackle it. Terry
427435 Posted May 16, 2011 Posted May 16, 2011 It's a diesel. It's going to smell like a diesel. You can't adjust the air/fuel ratio as such on a diesel. A qualified injection pump station can only adjust the fuel rate up or down--------the air is a constant. If there isn't black smoke coming out (or gray), it has plenty of air for the fuel that's being injected. I've also found it easy to bleed the air out of the system. I also don't understand why water in the fuel would cause overheating. Have you checked for any fuel leaks that could be causing a smell??
UCD Posted May 16, 2011 Posted May 16, 2011 Prime the fuel pump, crack an injector, crank over, system all blead, easy as that.
Caish Posted May 16, 2011 Author Posted May 16, 2011 quote:Originally posted by 427435 I've also found it easy to bleed the air out of the system. I also don't understand why water in the fuel would cause overheating. Have you checked for any fuel leaks that could be causing a smell?? I've replaced all the fuel lines. everything appears dry. Water in the fuel was not causing overheating, but it simulated it. With water in the fuel it would start fine in the morning then 15 or 20 minutes later it would pull down and die. LEt it sit for 10 minutes and it would run for another 15 or 20. Just like one that is overheating. :D
crahmes Posted May 17, 2011 Posted May 17, 2011 You may want to check the small screen filter on the fuel line fitting at the bottom of the fuel tank. There is a picture somewhere on these forums. I have a Simplictiy 7790 and when I was working on it over the winter, I found that mine was almost clogged. I just cut it off and added a small fuel filter in line. I know these motors have the canister fuel filter, but I figured I'd catch the "big stuff" before it reached the fuel lift pump.
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