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Issue unburned oil out of exhaust Kubota KND3

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Issue unburned oil out of exhaust Kubota KND3

Post by Mark15 user on Wed Sep 07 2016, 13:45

Dear Forum members,

Last sunday I've joined a local ralley with my engines including the Kubota.
In the morning the Kubota was running perfect without any issues.



However in the afternoon it started to drip (unburned) oil from the exhaust.
Therefore I decided to stop the engine to avoid further problems.
I've made only short runs (10-15 minutes max) up till now and this issue didn't occur

Surprisingly the engine did not smoke and seems to have enough compression.
Only when the engine is just started there is some grey smoke visible.
This disapears after a few seconds.
 
Any ideas or tips before I dismantle the engine?

Best regards,

Steef Pronk

.

Mark15 user
A true Stationary engine owner
A true Stationary engine owner

Posts : 106
Join date : 2014-09-06
Age : 46
Location : Holland

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Re: Issue unburned oil out of exhaust Kubota KND3

Post by the engineer on Fri Oct 07 2016, 18:47

hi john here  this can sometimes happen with diesels that are run without load or are run slow
try a load make it work or just give it some more rpm
possibly nothing wrong with the engine
is that a little pranafa engine in the middle I have a new old stock unit here a lovley little engine

the engineer

Posts : 1
Join date : 2016-09-07
Age : 59
Location : new zealand

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unburned oil issue Kubota KND3

Post by Mark15 user on Sun Oct 09 2016, 13:25

Hello John,

Thanks for your reply.
See my today's post in chapter projects/ restaurations.
It seems there is an issue (seems a broken oilpumpshaft)

The engine in the middle is a German Sachs Stamo 50 engine.
a 2 stroke petrol engine. (1963).
Can you please post a picture of your Pranafa engine?

Best regards,

Steef Pronk


Mark15 user
A true Stationary engine owner
A true Stationary engine owner

Posts : 106
Join date : 2014-09-06
Age : 46
Location : Holland

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Re: Issue unburned oil out of exhaust Kubota KND3

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