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Engines / Re: SL1 stalling warm
« on: October 05, 2020, 06:46:10 PM »
I forgot something.
According to the Ld/SL manual I have here the valve clearance is 0.002 both valves when cold with RPM above 1200. Below 1200 RPM inlet 0.002 exhaust 0.006.

Thanks Scott for sharing this..and  thanks for everyone else too!

I think that I'll do a full rebuild and hopefully problem presents itself during process. Thats what I was going to do anyway.
Its an old machine, and deserves to have new organs.

I owe you guys the answer what ever the problem may be. This way we can learn something from this.

I'll get back to you when I have something to share.


Engines / Re: SL1 stalling warm
« on: October 04, 2020, 08:24:01 PM »

There is no load, just idling. I have drove it with load, and it only quit a little bit faster with load. The generator is rated at 1.75kw. Load doesnt seem to be problem, whether its big or small.

So short circuit isnt likely here, because electricity is generated.

Bearing on the other hand is possible . Though I would suspect it would lower the power output. Now I tried 1.5kw load with no problem.

To me it feels like its getting too much fuel in ratio to air. Engine doesnt burnout all that fuel, and thats why it smokes. A/F ratio gets worse when engine gets hot. What is the mechanism engine to adjust this ratio? Or is the spill timing only thing that you can adjust?

 Injection timing seems to be correct. I tested it with injector spraying open air. Not sure if this is the way its supposed to be done.

I also cleaned those cylinder fins with break cleaner and brush. There was basically just some black oil /soot that game off  suprisingly easy. I havent measured temperature after cleaning, but I think it wont make a big difference.

Also removed the inlet/exhaust manifold to see that its pettynyt clean.

The smoke is white/Light Grey at the beginning, and gets darker after a while. Not Black anyway

Engines / Re: SL1 stalling warm
« on: October 04, 2020, 09:46:28 AM »
Here is another link: https://youtu.be/PASkI28uiDM

This is after 1 min from startup. Less smoke, and easier running. Is there a way to adjust fulp pump feed?

Engines / Re: SL1 stalling warm
« on: October 04, 2020, 09:38:09 AM »
Hi guys,

And sorry for radio silence.

A lot of good ideas here, thank you!

I took a little videoclip friday, and got it uploaded today. Here is the link: https://m.youtube.com/watch?v=Vi6qInlm5FA this is after about 17mins of idling. Cylinder surface temperature was 112 celsius at this time.

Engines / Re: SL1 stalling warm
« on: September 30, 2020, 10:24:45 PM »

Good discussion here.

I'll take a good video clip Friday...including the shut down part.

Fuel tank itself is vented aftermarket tank. I've also tried another tank (bottle with vent cap) to rule out the tank. Same thing with another tank.

I dont think that the engine heat could rise high enough to cause vaporization this fast. I'll measure temperatures to rule this out also.

Tappet clearance is in check. 

Fuel injection timing is one thing I havent check. The shims are intact though. Could wrong timing be causing these symptoms.

Thanks again for everyone!  This thing is puzzling me   ???


Engines / Re: SL1 stalling warm
« on: September 29, 2020, 03:44:24 PM »
Hi guys!

Thanks for your responses.  :)

Hi JP,

Some questions:

Is it easy to turn over when it's hot? Easier than when it's cold? Or the other way around - really stiff to turn when hot?
Does it smoke at any time when running (and if so, what colour)? Is it smoking when it's stalling out?
Does it gradually slow down and stop, or does it just quit all of a sudden?
If you try to start it when hot, what does it sound like? Wheezy or normal? Do you get any white smoke?

I'm sure others will chime in with questions & suggestions that I haven't thought of.

It doesn't seem to affect engine turning noticeably whether engine is cold or hot.

There is some white/light grey smoke, which seems to be increasing somewhat at the end.

Stalling is not very sudden. It fades away within few seconds. No misfiring, rough idle or coughing. Engine just quiet down, maybe within 5 to 10 seconds. Until that it seems to run normal to me.

Is it possible to attach a video clip here?

Thanks again!

Engines / SL1 stalling warm
« on: September 29, 2020, 09:51:36 AM »

I have a mysterious problem with my engine. It runs perfectly for about 15-20 min and shuts down after that. It wont start after that, before cooling down.

Tank is up high, and fuel seems to be running well after disconnecting lines. 

 I've replaced all fuel line seals and made sure that there are no air leaks.

I've also replaced fuel pump and injector unit with new ones.

What am I missing here? Blown head gasket? Cracked cylinder or head? Are these common?

Fuel injection timing?

My headache isn't going away before I have my Lister running again!

So please, any help is wellcome!


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