If your engine is fresh water cooled confirm your anti freeze mix is no more than 50:50. Yes it will over heat, been there. Ray Shibe ...........Yanmar 3HM Sent from my iPad
> On May 29, 2016, at 12:59, Rick Rohwer via CnC-List <cnc-list@cnc-list.com> > wrote: > > Hi Tom > > Sorry to hear about your issue! I was going to suggest a look at the through > hull as we had sucked a sardine into ours in desolation sound a while back, > but in that case the flow of water was drastically changed. Backing down on > the engine to idle allowed for a return to port. > I have had some problems in the past with other boats where the buildup of > crud both in the heat exchanger and the exhaust elbow slowly choked the > cooling system. In combination with dirty bottom, headwinds, or tides it may > have stretched to the capacity of what cooling you have. > Usually the major culprit for me was the elbow (as you are thinking). I am > overdue for a replacement as well so I have been watching them on ebay. I > have pulled one on a previous vessel that literally fell apart as I was > wrenching on it. > I do question whether stainless steel will hold up better in this > application. Heat, oxygen, and chlorides are real problems with stainless > steel. Any opinions on replacement with stainless over cast iron for this > area? Titanium would be awesome! > It sounds like you are similar as well in that when we go south the wind is > in our face, and on the return, yep, in the face again. We hope to do a > south sound swing in June as well! > Fair seas, > > Rick > > Paikea 37+ > Poulsbo, WA >> On May 29, 2016, at 9:03 AM, Tom Buscaglia via CnC-List >> <cnc-list@cnc-list.com> wrote: >> >> We are on our first extended cruise of the year for a club event in Olympia >> WA and are hiving a problem with overheating with our 3HM35 Yanmar. Here's >> the deal... >> >> We usually run as about 26-2800 RPM. Depending on the condition of the >> bottom and the prop, that gives us between 6.5-7.3 KTS. We have had some >> intermittent issues with overheating, but it was usually me pushing too hard >> in heavy seas or running above the usual RPM range. Backing off always >> relieved the problem. And we have no gauge, so this is all based on the >> alarm which may or may not be accurate. >> >> As we were heading out this time the Admiral was at the helm and I was below >> messing with something and the alarm went off as we were running at about >> 2200 RPM. We were able to run at under 2000, but above that the alarm >> sounded and we had to back down. We continued on at 4.5 KTS. >> >> I checked the strainer and through hull. All good there. Water seems to be >> exiting the exhaust as usual. I am planning on a haul out and bottom job >> next month, and did not have a diver clean the bottom and prop (should have >> done that for sure). My assumption was that the barnacles on the prop and >> dirty bottom, along with the 15-20 KT head wind were taxing the engine and >> causing the overheating. But the "experts" in my club feel otherwise. >> >> I tried to get at the gooseneck to see if that might be the problem. I was >> able to get the water hose off and poke around in there with a wire, but >> decided that pulling the exhaust hose was not something to try 30 miles from >> home as if I screwed it up and damages the exhaust hose I could be stuck >> here for a while. >> >> I have heard all of the problem YANMAR's have with exhaust back up and am >> wondering if that may actually be the problem. I have asked to have it >> checked every tine I get the engine serviced, but there's no telling what >> that entailed or even if it was done....so, when she goes into the yard for >> the pain job I think replacing the gooseneck with the stainless aftermarket >> one may be in order. >> >> Here are my questions: >> >> 1. Can the dirty bottom and barnacle encrusted prop- result in an >> overheating problem? >> >> 2. Would a carboned up gooseneck cause a problem like the one I am >> experiencing? >> >> 3. Where can I get one of those nifty aftermarket stainless goosenecks? >> >> Any additional suggestions are welcome and appreciated! >> >> thx >> >> Tom B >> .¤º°`°º¤,¸¸,¤º°`°º¤¤º°`°º¤,¸¸,¤º°`°º¤. >> Tom & Lynn Buscaglia >> SV Alera >> C&C 37+/40 >> Vashon Island WA >> (206) 463-9200 >> www.sv-alera.com >> >> >> >> _______________________________________________ >> >> This list is supported by the generous donations of our members. If you like >> what we do, please help us pay for our costs by donating. All Contributions >> are greatly appreciated! > > _______________________________________________ > > This list is supported by the generous donations of our members. If you like > what we do, please help us pay for our costs by donating. All Contributions > are greatly appreciated!
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