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 <[email protected]> wrote:
From: mlong9876 <[email protected]> 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" <rasie...@.. .> 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]
