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Author Topic: St1a oily exhaust smoke and grade of engine oil  (Read 2332 times)

Johnny slab

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St1a oily exhaust smoke and grade of engine oil
« on: May 06, 2019, 01:26:08 PM »
Hi all
I’ve been working on my Davis chain trencher and am wondering what engine oil should be in it- at present I’ve got 15w40 part synthetic but am a little concerned that the exhaust smoke is a bit oily. Any advice?

Johnny slab

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Re: St1a oily exhaust smoke and grade of engine oil
« Reply #1 on: May 07, 2019, 08:40:15 PM »
That would be hydraulic lock- I don’t think I will try that one.

sirpedrosa

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Re: St1a oily exhaust smoke and grade of engine oil
« Reply #2 on: May 07, 2019, 09:45:03 PM »
Hi JS

Maybe is time to take a loock at the piston rings waring...

BR
VP
By order of firing up:
Bernard 18A - 1968 (mama's water pump - year of my birth)
Petter PAZ1 - Jun 1967, 3HP, sn 416xxxx
Petter PAZ1 - Nov 1979, 3HP, sn 425xxxx
Lister 12/2 - 12651227, the pearl!
Deutz MAH 914, 1952 - Zündfix in chamber and go (7Mai2023).

guest23837

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Re: St1a oily exhaust smoke and grade of engine oil
« Reply #3 on: May 07, 2019, 10:39:21 PM »
Glort is a multi talented and knowledgeable individual he's never going to tell you anything that's not true. I was very worried about dripping the water into my engine however it went very well the engine was hot water turned to steam and as you know steam is great at cleaning anything. Glort also has the ability to swear for 15 minutes without repeating himself.

Hugh Conway

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Re: St1a oily exhaust smoke and grade of engine oil
« Reply #4 on: May 08, 2019, 01:15:08 AM »
@ Johnny slab
Have no fear.

As Johndoh said, "Glort is a multi talented and knowledgeable individual he's never going to tell you anything that's not true."  He might run on a bit, but won't give you a bad steer.
I squirt about 1 liter of water into my 6/1 every so often to keep the innards clean.
Been doing it for almost 7 years. Does not even slow it down. I do it when running a fair load on the generator.

It works fine. give it a try.

Cheers
Hugh
JKson 6/1  (Utterpower PMG ) Off-grid
Lister 6/1 Start-O-Matic engine......running with PMG
1978 Royal Enfield (glutton for punishment by Indian iron)
1963 BMW R-27 project

buickanddeere

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Re: St1a oily exhaust smoke and grade of engine oil
« Reply #5 on: May 24, 2019, 05:19:29 AM »
   Oily smoke and soot deposits are products of incomplete combustion.  Engine coolant temp should be 195-210F. straight 40 weight oil is better than 15W-40.  Air filter ? Too small or dirty ? Injection event too late ?