My 84 Universal M-18 has approx 520hrs and does exactly the same thing. I was begining to think I had a problem, glad to see it is normal.
--- In [email protected], mikea...@... wrote: > > Hi Catalina People, > > While we are discussing engines I want to throw something out there and > hopefully one of you can respond. > > My engine runs and sounds beautifully. I have had it serviced every year and > taker very good care of it. > > My issue is black soot/smoke sticking to the starboard side of the transom. > It takes a couple hours to show up on a clean transom. > > Keep in mind, my engine never visably smokes.... > > My trusted diesel guy said my engine at 240 hours is in primo shape. Again 84 > Universal M18. > > My thought is this.... when under power the exhaust exit gets barried under > water, small bubbles carrying small amounts of exhaust turn in the water up > against the transom around the starboard side leaving a black exhaust > mark....always the same place and always the same shape. In my opinion > Catalina should have put the exit about 4 inches higher.....and no, the boat > doesn't have too much weight in the back. > > Does anyone have this issue? > > I would appreciate feedback. > > Keep in mind all reasons for smoke in the first place have been checked and > cancelled out. > > Thanks > Mike > ( Tabu ) > Sent on the Sprint® Now Network from my BlackBerry® > > -----Original Message----- > From: acdalz...@... > Date: Wed, 10 Mar 2010 17:47:03 > To: <[email protected]> > Subject: Re: [IC27A] clickety clack > > My Universal Diesel sounds just like a big diesel pick up truck...lots of > clatter. It's the same as the sound of pre-ignition or engine knock in a gas > engine and that is because both pre-ignition in a gas engine and > compression ignition in a diesel happen the same way. In a diesel its > normal, in a > gasoline engine it's not. > > Mine is probably most noticeable at idle or low speeds and when the > engine hits higher speed I hardly notice the clatter. The exhaust noise > probably > drowns out the noise of compression ignition at higher speeds. If your oil > is at the proper level, your fuel is clean and water free, you power is > good, you are not overheating, and you have no noticeable smoke then don't > worry. Everything is fine. > > Andy Dalzell > Catalina 27, hull # 6298 > Battery Park Marina, Sandusky, OH > > In a message dated 3/10/2010 5:32:38 P.M. Eastern Standard Time, > akerma...@... writes: > > > > > This is a normal sound. It is the combustion itself. In a gas engine, > the combustion takes place in a certain pattern as the gases ignite in a > swirl or sequence determined by the spark timing and shape of the combustion > chamber. In a diesel, the combustion is initiated by compression and > happens > all at once. That may not be the most scientific explanation, but I think > you get the idea. > > Mark A > Mad Hatter > #5306 > > --- On Wed, 3/10/10, David Savlin <dsav...@...> wrote: > > > > From: David Savlin <dsav...@...> > Subject: Re: [IC27A] clickety clack > To: ic...@...: > Date: Wednesday, March 10, 2010, 10:35 AM > > > > I agree with Keith. My diesel runs very well and does sound like a > gasoline engine with a valve train in severe distress, but I know my motor > is > healthy. > > > I've learned that a diesel running under normal load should not have any > smoke in the exhaust. If you get white, blue, or black smoke in the exhaust > there's a problem. The other big symptom of trouble is if you can't get the > rated power out of it. Diesels are VERY sensitive to fuel system problems > in this regard. Even the tiniest clog in the filters or water in the fuel > can wreak havoc. > > > David > > > On Wed, Mar 10, 2010 at 11:53 AM, RobAdkins <_robadk...@lifetalef > ilms.com_ > (http://us.mc574.mail.yahoo.com/mc/compose?to=robadk...@...) > wrote: > > > > > > hi all, > > i was wondering what a healthy diesel engine sounds like. mine acts > healthy but sounds as if there's an extra high pitched tap-it noise akin to > the > valves on an old small block 350 in need of adjustment. not knowing much > about diesels, i thought i'd query the community at large. is there a way to > upload a sound recording to the group's page? thanks -rob >
