Hi Dwight, I chose wood so I wouldn't scratch the copper tubes. A pipe cleaner would be better, but I couldn't find long ones. The exchanger is 13 to 15 inches long. Long pipe cleaners are available on the web. When you remove the end caps, only a quart of seawater falls into the bilge. There is a pencil zinc inside the port end of the exchanger and I change that every year. I think 9/16" wrench fits the cap bolt as well as the zinc? I found a Youtube video showing how to rod out the tubes using a flexible SS 1 x 19 wire and a drill. I may try that method someday? https://search.yahoo.com/search?p=youtube+marine+heat+exchanger&ei=UTF-8&fr=chr-greentree_ff&ilc=12&type=800236
Found this product that looks like a good way to clean the inner, fresh water side of the tubes and inner shell and inside of the engine. The videos show amazing results and it's biodegradable and doesn't burn your skin. http://www.rydlymemarine.com/ BTW, I bought about dozen of the 1/8" wooden dowels from an art supply store. I broke them in half to store inside my tupperware container for engine spare parts. I break a couple each during annual cleaning and throw them away after use. I don't get the copper tubes shiny clean. I open obstructions and get most of the scale out. The dowels have worked well to keep us going, but I am looking to order Pipe cleaners, and follow up with those next year. Chuck Resolute 1990 C&C 34R Broad Creek, Magothy River, Md ----- Original Message ----- From: "dwight veinot via CnC-List" <[email protected]> To: [email protected] Cc: "dwight" <[email protected]> Sent: Sunday, August 9, 2015 10:17:23 AM Subject: Re: Stus-List cleaning heat exchanger Thanks chuck; I am guessing that is my problem and I have never cleaned that heat exchanger in my 10 years with Alianna. How much F/W coolant will be let loose? How much salt water will be let loose? You make the job seem easy; approximately how long are the tubes? Why did you choose a wood dowel versus wire? Dwight Veinot C&C 35 MKII, Alianna Head of St. Margaret's Bay, NS [email protected] On Sun, Aug 9, 2015 at 10:35 AM, Chuck S via CnC-List < [email protected] > wrote: Hi Dwight, I do have the M4-30 and it when it ran hotter than normal, I clean the little tubes with 1/8" wooden rods I buy from an art supply or hardware store. I run my engine at 190 degrees. I thottle back if the temperature gets above that. To clean: With the engine off and the seacock shut, I remove both ends of the exchanger and simply push the wooden dowels through a few times. There are about 30 to 40 tubes, but it's pretty easy. A diesel mechanic recommended I remove the exchanger and have it acid cleaned to remove any scale from the fresh water side. I haven't done that. I heard of a product you use without disassembly, and then you flush it and replace your water and antifreeze mix. I'll try and find that. Chuck From: "dwight veinot via CnC-List" < [email protected] > To: [email protected] Cc: "dwight" < [email protected] > Sent: Sunday, August 9, 2015 8:20:01 AM Subject: Re: Stus-List Raymarine EV-100 and backbone wiring Hi Chuck I recall reading in one of your C&C posts that you have an M4-30 and that you dismantled and cleaned the heat exchanger. Is that correct and if so what did you find inside? I mean how it’s built and was anything clogging it? Also did you ever do any cleaning/maintenance where the salt water from the heat exchanger enters the exhuast gas line? My M4-30 runs great at 1600 rpm but when I run it at higher rpm’s it runs hotter than I think it should, like at 2500 rpm the temp gage climbs to boiling and sometimes 220 F but the engine is still smooth and strong, just hotter than I would like to see. I would like to see more water exiting the boat and I know my raw water pump is good since I have installed a new impeller with no noticeable change in performance and I know the raw water feed to that pump is not blocked, lots of flow into the bilge when I disconnect it from the pump. Can yo give me any advice from your experience. Thanks dwight Dwight Veinot C&C 35 MKII, Alianna Head of St. Margaret's Bay, NS [email protected] _______________________________________________ Email address: [email protected] To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com _______________________________________________ Email address: [email protected] To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
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