d17 sputters

[bob from ill]

I have a series 1 d17. At idle and at WOT it runs like a top, but under a load it spits and sputters. has new plugs and wires, last year I replaced the head gasket due to leaking copper seal. the sputtering was going on before the head gasket replacement. Ihad hoped it was from coolant leaking into the cylinder but i was wrong.

 

[old]

I would try to open up the main jet just a little at a time to see if that helps. You should be able to open it up to the point you get black smoke and if you can't then you probably have a clogged up carb which will cause your problem
Hobby farm

 

[Jeff Z.]

Old is pointing you in the right direction. Fuel restriction. If it is not in the carburetor check the outlet of the gas tank and the inlet to the gas bowl. Have had many with plugged fuel bowl inlets and engine would run poor or stop under load.

 

[Jerry Coulter]

Check for a worn distributor shaft bushing. If you have a dwell meter, it will show variation at different RPMs.

 

[Anonymous-0]

You might check the timing also. On our WD45 puller, we were having the same symptoms, after adjusting the timing, no more problems.

 

[BushogPapa]

When the WD-45's were our main power, we would get a miss under load if there was just ONE drop of water in the sediment bowl, under the fuel tank.
Once cleaned, NO more miss...

FWIW..
Ron.

 

[Dardan]

Might consider gummy, sticking valves. My WD would run fine till a load was put on it. The extra heat from working would expand the valve stems just enough to start erratic missing.
The fuel system and ignion were near perfect by the time I found the sticky valves.

 

[FireDiver]

Similar issue, 175 spitting and sputtering under load. Initially it was after a few minutes under load. Turning load adjustment on the Marvel-Schebler TSX-928 didn't seem to be changing much. The more i experimented, sputtering eventually changed to affecting at idle. was guessing carb rebuild/replacement. $$$.

Jeff Z's post convinced me to track the issue up the fuel line. I had already done this and was getting fuel. but evidentially, not enough. I found a spring (approx size of kind you find in a retractable ball point pen) stuck in the petcock on bottom of fuel tank. poked that out and fuel flowed much faster. removed spring from tank and put everything back together. reset load adjustment on carburetor back to 2 turns back from shutting off fuel. runs as it should.

such value in finding these threads. 18 years later. cheers.

 

[Nordic]

I have a series 1 d17. At idle and at WOT it runs like a top, but under a load it spits and sputters. has new plugs and wires, last year I replaced the head gasket due to leaking copper seal. the sputtering was going on before the head gasket replacement. Ihad hoped it was from coolant leaking into the cylinder but i was wrong.

I would think a failing ignition coil is high suspect. Will not perform under load. I have had that happen on my equipment.

 

[used red MN]

such value in finding these threads. 18 years later. cheers

I would think a failing ignition coil is high suspect.

Hello FireDiver, welcome to YT! There is definitely value in “old threads”. However, there is not much value in a reply in which a member does not pay attention to all the information available to them such the date the original post they replied to was penned.