Accelerator Mystery

About a third of the way through its downward arc, the accelerator lever reaches a point where the engine slows down and begins to cut out rather than speed up. Once past that point in the arc of the lever, the engine begins to accelerate again. I am wondering if the first third or so of the arc is some kind of "choke" range. When in that part of the arc, the engine runs much more smokey than when I pass the lever into the other two-thirds range. Once in the bottom (faster) two-thirds of the arc the engine begins to run smooth and clean.

What might I be encountering here? Is this normal, or do I need some kind of adjustment? I notice that the air intake is on the opposite side of the engine from the fuel injector, so I can't use my primitive understanding of carburetors, where fuel and air are mixed on a gas engine, to figure this one out. Thanks in advance.

The motor should have a steady rpm through the whole movement of the "vacuum" control lever that affects the govenor on the injection pump.It is just a flap in the ventury that is hooked to this linkage.The pump governor moves back and forth according the pressures in the intake ports by the ventury flap.I don't know the vacuum pressures in these ports, but it is not much.A hole in the diaphram would sure give your motor fits.

These are direct injection machines, I think is the proper term. There is other varients, indirect (pre-chambers), two stroke Detroits, and newer systems with oil pressurized injectors that I haven't seen in my price range (joke). Make sure your oil bath has new oil in it.They are often forgotten and pretty neglected.Mine was pretty interesting!!!

Thanks, Dave

I will bring the following:

injection pump
shift lever
horn (just kidding)

Give me a short list of the things I missed.

The rest of the things you need are on that tractor at Dan's. We can swap the stuff that you need off of that Super. I will let you know when it is. I think I want to ski at Bachelor soon so I will let you know on that.

Other than the accelerator problem already identified, I'd like you to look at the engine and give me your thoughts as to where I am leaking oil. The engine has the usual number of drips and leaks, mostly fuel at the sediment bowl and a slow lead somewhere in the fuel tank, maybe up inside where the steering column comes through. The other leak that concerns me more than fuel is one that occurs when the engine is running. I notice that after every use the front axle and front wheel/tire (right side) are spattered with fine drops of black oil, and that the front underside of the engine drips a few drops of engine oil when I shut it off. Then it stops dripping until I fire it back up again.

Ron, if you read this, I used to live in upstate New York. I was pastor of a church in Delhi, near Oneonta. Are you in the Catskills, Finger Lakes region, or the Adirondacks? I love New York (the state, that is).

As long as you check the oil regularly to ensure you arent running low, and top her up as soon as shes under the full mark. that should be fine.

I cross country ski, or nordic as some people call it.Bend has the best facility in Oregon at Bachelor.I am 50 and it keeps me somewhat young.I would think that the Upstate NY people do that a lot?

Interesting, the ONE time I took up skiing it was cross-country, and in upstate New York. A very brief fling when I was in my thirties, and I found it too exhausting even then. Are you interested in a very ancient pair of Rossignol skis and poles?

Dave, our local Ford dealer has a few parts listed for these tractors, and they are expensive.So to make a long story short, I have used the internet and this site to locate parts for my tractor(s).Some of the parts came to me with British postages on the box.Hopefully more parts sources will pop up in the US as these tractors are getting restored.It appears to me that thye have since I first started working on them four years ago.

I am not sure who is the least expensive parts source for Simms.It will take some time for me to find out.Maybe someone else can help here????

The silicon could work.It should not hurt anything as long as you let it dry.Let us know how it works if you try it.