Ralph, I remember Mike's very similar problem about a year or so ago. I have a gas A4 in my old C27 but the acid flush process is the same. Go to the Moyer Marine Community Forum web site and search for the process. It's an easy deal. The muratic acid sold in good hardware stores is the ticket. It's a diluted version but you still need to wear gloves and try not to breath the fumes. I do the process every couple of years and I think most salt water raw water cooled sailors do too. Good luck!
Mark C27 "Solution" --- In [email protected], Ralph Siedel <rasie...@...> wrote: > > Dear Mike - Thanks for the note and data. I'm in Tucson - about 6 hours and > the border from the boat but plan a trip the 30th to try the sulfamic acid > solution. However, I'd like to know the proportions of the muriatic acid to > water solution also. that way I'd have a second option. I pulled the exhaust > manifold off the engine in November and found it loaded with black gunk and > rust- years of sloppy maintenance and neglect -- cleaned out what I could > reach and flushed water through the block by attaching a garden hose to the > exit hose from the impeller to the engine -- I got quite a bit of water to > pass through the head- got pretty wet! I expect to be able to suck the > solution(s) through the impeller and into the engine. I'll set up a bucket > for the return hose to catch the "leaving" and recycle the solution as the > engine heats. I plan to run a trickle of water out the exhaust to help keep > the exhaust hose cool. I appreciate your advise and > experiences.Reread your note- I assume "less caustic" means the type of > muriatic acid sold at hardware stores? This acid is sold in Mexico but the > sulfamic acid seems hard to get. I assume you sail back east. Most of ours > is done in the Gulf of California >  between Baja and the mainland of Mexico. Pretty neat area. Again -- thanks > for the Info and hope you can find the proportions for the > solutions. RalphAnnaBelleLee '82 Catalina 27-- 5456 ! > --- On Wed, 1/6/10, mlong9876 <mlong9...@...> wrote: > > From: mlong9876 <mlong9...@...> > Subject: [IC27A] Re: Overheating Universal 5411 Diesel '82 > To: [email protected] > Date: Wednesday, January 6, 2010, 11:28 PM > > > > > > > > > > > > > > > > >  > > > > > > > > > > I posted the same problem on here when I first got my boat. It > overheated terribly in the first 2 hours of a 100 mile trip from the south > shore of Long Island through the city to the north shore so we had to sail > most of the way, and of course, the wind was directly on our bow the whole > trip. I posted a message on here and received lots of great responses, mostly > involving the impellor and the water pump. I had a mechanic come down and > remove everything and clean it the best he could. He forced water though and > made it come rushing out (under pressure). I thought the problem was resolved > even though it wasn't "spitting" out water the way my neighbor (old, salty > powerboater) thought it should. I assumed that because it was a small diesel > and had already been cleaned by a professional that this was the best I would > get. > > > > I took the boat out again and ran the engine a little longer than I "should > have" and it happened again. One of the suggestions I didn't take from > someone on here was to do a muriatic acid flush. I had heard the same things > you heard and thought it was a little too extreme now that water was coming > out, but obviously something had to be done. I followed the suggestion and > did a muriatic acid flush and now the water comes rushing out the way it > should. My old, salty neighbor approves too! > > > > If I can find the link he gave me showing how to do it, I'll post it here. > > > > I was only going to buy the heavy duty stuff because I thought, "if I'm going > to do this, I'm going to do it right" but the guy in the hardware store told > me that the less caustic version worked just as well and is way less damaging > to the skin. I'm not one for gloves or goggles and this is definitely a job > where this stuff could get on you so I recommend the less caustic version. > > > > Good luck. > > > > Michael > > Gracie Day > > '84 Catalina 27 #5460 > > > > --- In ic...@yahoogroups. com, "rasiedel" <rasiedel@ .> wrote: > > > > > > Years of other owner's neglect and mine have lead to little or no salt > > water running through my 27. She is located in San Carlos, Sonora, Mexico > > and I visit- and work on her 2 or 3 months a year. She sits on a trailer. I > > have checked and replaced the impeller, checked all hoses and elbows. > > removed the exhaust manifold and cleaned out what I can see. I have be > > advised to run Sulfamic Acid, in a solution, through the cooling system-- > > haven't done this yet -- Others suggest Muriatic Acid but warn of losing > > gaskets. Other than a total removal of the engine and machine shop > > "cooking" --- I've run out of ideas-- Any suggestions? ? Ralph > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] >
