Nice write up Kim! Rich Knowles Typed by thumb.
On 2012-08-20, at 22:52, "Kim Brown" <[email protected]> wrote: > From: jackson maddux > Sent: Monday, August 20, 2012 7:35 PM > To: [email protected] > Subject: Re: Stus-List Yanmar Problem > > Kim, could you please elaborate on item #4, the mixing elbow? Where do I > look for it on the engine? > > thanks, > > -Jackson > > Jackson, > Others have answered but to elaborate- Aft starboard top side of the engine. > follow the exhaust hose from the muffler back to the engine and it will > travel up into a cast metal "u" that is 'upside down'. There will be a hose > going into the U from the back of the heat exchanger (this connection seem > to vary a bit from year to year) This is why it is it is referred to as a > mixing elbow- the cooling water is mixed with the exhaust and pumped out > through the muffler. (ie the boat is 'spitting water' isn't it? ) With the > exhaust gases, heat and the seawater this elbow will crud up over the years > restricting the exhaust flow finally to the point that it effect > performance. There is a piece that is bolted to the engine that comes > straight back and then hooks 90 degrees straight-up into a stainless close > nipple that in turn screws into the mixing elbow. (note the nipple has right > and left threads) Often it will be easiest/necessary to unbolt the whole > assembly from the engine and separate everything in the comfort of you own > garage where you keep the big hammers, economy size PB Blaster, torch and > other implements of destruction. If you aren't on a budget just replace all > three parts and then you don't have to worry about separating everything > ;-). There is a gasket which good practice says you should replace too. > Usually the piece that bolts to the engine will be ok. Maybe you can reuse > the stainless nipple but I'd do both it and the mixing elbow. Some claim you > can 'clean' them - I guess you can but I have never had any luck doing so > and having the results last any length of time. Access may be an issue- my > current 35 requires a contortionist. My last boat had much better access. > > > Note: do this after you have cleaned the prop, and changed the filters, > checked for water in the filter bowl etc. - do the cheap, obvious, and easy > first. If it is still acting up then this goes on the list of relatively > common possibilities. > > Kim Brown > TrustMe!!! 35-3 > > > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > [email protected] _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com [email protected]
