Update, Update! Thank you again for all your thoughts and ideas on our shaft cutless bearing questions. PWC
is doing what it should and the bearing is not a problem as suspected. On to what may be the problem. As a reminder, we have a later 60's Petter diesel
(AB1W), 1 cylinder, 6 HP. Now after being the hole and getting some advice from a local person who has one of these little 1 cylinder jewels (for a generator), we have some new info. After finding water in the diesel fuel
and taking a long time to new filters and get all that fixed, we were on again to the "mystery smoke" issue. Starting the engine at the dock
and it purrs like a kitten until you put it in gear
running the engine gently. Goes forward for 4-7 minutes just fine, then starts to slow down and will shut down unless you put it back in neutral quickly then it purrs again just fine. As the engine is "slowing/pulling down is when you notice the "smoke" coming up from the engine hole. First let me say, this engine is in a tiny, tiny space and my wife volunteered to crawl down into the hole to check out the "smoke" source. A flashlight revealed the "smoke" is actually a hole in the water cooled copper wrapped exhaust
pipe coming from the engine. 1/4" hole hard to see as it is partly under the copper cooling
tubes. Flashlight held there makes the exhaust
show up when the engine is running. SO very embarrassed that we thought it was smoke from the cutless bearing. BUT, the exhaust really comes out more as the engine starts to choke down after being in gear
a few minutes. We have no mechanics around here that know anything about diesels, but the good ole boy consensus is that it may be something going on in the "drive train" (same as transmission
?) We are going to change the engine oil
and filter (not been done in a LONG time but likely this engine has no more than 150 hours total in it's 40 year life span). Might this old oil
be the problem? DOes the engine oil lubricate the transmission/drive train? Does this sound like a transmission issue? when you put it in reverse, it will slow down quicker then stop. The stopping process sound is very short, but sounds rather like metal rubbing. But again, when you quickly put it back in neutral, it runs like a dream. Our old manual give recommendations for "stern gear grease". Also, manual does not tell you where to put said grease.
Now, any new ideas out there???? Thanks again for any help you can provide!!