Olcowhand already knows of my issues I am having with the Onan but we still haven't gotten it figured out. When I first put the Onan Performer 20hp in the 1655 it did great. Then with all the tractor shuffling we have been doing I had it setting outside for a couple days. Of course those couple days is when we were getting hammered with rain. The problem with that is the gas tank/fuel level cap is missing the plastic lens and it acts basically like a funnel for the water to get in to the tank.
Ever since it sat out is has been acting up. There wasn't that much gas in it and I added a little dry gas to help disperse the water that might have gotten in. I figured I would just run the gas that was left out of it and then refill with good gas and not park it outside anymore.
I used the 1655 a good bit yesterday with loading mulch in the garden cart my wife was towing behind the Massey 12H. It was driving me nuts and I finally had enough and was bound to fix it. The symptoms are it idles perfect, once in a while it will sound like it misses at idle but not too often. When you rev it or put it to full throttle it misses a lot more, sounds just like it is running out of gas. It gets even worse when it is under load ie; lifting the bucket or driving around.
So I finally had enough and pulled it in the garage, pulled the carb off and cleaned it completely, also blew air through all of the passages to make sure they were all clear. The float height was set really low and I set it to specs and I thought for sure I found the problem. Put it back together and still the same thing.
So this time I took the carb off again and cleaned it again just to make sure I didn't miss anything. Didn't find anything other then just cleaning it for the second time. Put it back together and it is still acting up.
So now I figure the 3rd time is the charm and it has to be something either with the fuel filter or the gas tank. I pulled the gas tank off and drained it, pulled the petcock out and took that apart and cleaned it as well. The petcock did have some crud in it so I was hopeful that was my problem. While the carb was still on the engine I fired it up to run that last of the gas through the line and bowl. While it was running I checked the line on the inlet side of the fuel pump and it had pretty good suction, granted I didn't hook up a vacuum gauge.
With the fuel lines being ran empty, I pulled the fuel filter off and replaced it with a piece of straight hose line to splice the hoses for the time being. I pull the carb off for the 3rd time, I figure why not because now I have it down to a 5 minute job. Triple checked everything with the carb and still didn't find anything unusual. The only thing that I couldn't do was remove the one welch plug because I didn't have a replacement. So I put it all back together and still the same thing.
At this point in time I am ready to yank the Onan off of it and chuck it or take a sledge to the carb. I know it is going to end up being something simple and I will wanna kick myself in the arse. After this last time, I pulled the spark plugs to make sure it was firing on both cylinders and the plugs looked great, almost on the lean side, would like to see a little more tan color to them. I did notice that when the engine is running and you rev it up the fuel that would come out of the emulsion tube(don't really know what it is called) kind of just dribbled. I don't see how the dribble would atomize correctly.
Anyway that is my saga, I am going to replace the fuel pump with a spare I have even though I am pretty sure the fuel pump is good. Is there something else I am missing? The engine fires right off, faster then it ever has. I know it is fuel related, for some reason though I just haven't gotten it.
Ever since it sat out is has been acting up. There wasn't that much gas in it and I added a little dry gas to help disperse the water that might have gotten in. I figured I would just run the gas that was left out of it and then refill with good gas and not park it outside anymore.
I used the 1655 a good bit yesterday with loading mulch in the garden cart my wife was towing behind the Massey 12H. It was driving me nuts and I finally had enough and was bound to fix it. The symptoms are it idles perfect, once in a while it will sound like it misses at idle but not too often. When you rev it or put it to full throttle it misses a lot more, sounds just like it is running out of gas. It gets even worse when it is under load ie; lifting the bucket or driving around.
So I finally had enough and pulled it in the garage, pulled the carb off and cleaned it completely, also blew air through all of the passages to make sure they were all clear. The float height was set really low and I set it to specs and I thought for sure I found the problem. Put it back together and still the same thing.
So this time I took the carb off again and cleaned it again just to make sure I didn't miss anything. Didn't find anything other then just cleaning it for the second time. Put it back together and it is still acting up.
So now I figure the 3rd time is the charm and it has to be something either with the fuel filter or the gas tank. I pulled the gas tank off and drained it, pulled the petcock out and took that apart and cleaned it as well. The petcock did have some crud in it so I was hopeful that was my problem. While the carb was still on the engine I fired it up to run that last of the gas through the line and bowl. While it was running I checked the line on the inlet side of the fuel pump and it had pretty good suction, granted I didn't hook up a vacuum gauge.
With the fuel lines being ran empty, I pulled the fuel filter off and replaced it with a piece of straight hose line to splice the hoses for the time being. I pull the carb off for the 3rd time, I figure why not because now I have it down to a 5 minute job. Triple checked everything with the carb and still didn't find anything unusual. The only thing that I couldn't do was remove the one welch plug because I didn't have a replacement. So I put it all back together and still the same thing.
At this point in time I am ready to yank the Onan off of it and chuck it or take a sledge to the carb. I know it is going to end up being something simple and I will wanna kick myself in the arse. After this last time, I pulled the spark plugs to make sure it was firing on both cylinders and the plugs looked great, almost on the lean side, would like to see a little more tan color to them. I did notice that when the engine is running and you rev it up the fuel that would come out of the emulsion tube(don't really know what it is called) kind of just dribbled. I don't see how the dribble would atomize correctly.
Anyway that is my saga, I am going to replace the fuel pump with a spare I have even though I am pretty sure the fuel pump is good. Is there something else I am missing? The engine fires right off, faster then it ever has. I know it is fuel related, for some reason though I just haven't gotten it.