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Zinc on Perkins 4-108
Ok.
Let's settle this once and for all. Can't find one on mine. I know there are quite a few out there with the Perkins 4-108M - Does it or does it not have a zinc - standard? Do you think it needs one? How best to retrofit one? Thanks, |
Zinc on Perkins 4-108
On my Westerbeke 4-108, there is a zink in the heat exchanger and that
is it. check your heat exchanger. |
Zinc on Perkins 4-108
On 18 Jan 2007 09:52:01 -0800, "beaufortnc"
wrote: Ok. Let's settle this once and for all. Can't find one on mine. I know there are quite a few out there with the Perkins 4-108M - Does it or does it not have a zinc - standard? Do you think it needs one? How best to retrofit one? Mine just had one on the heat exchanger. Since it's FWC, one in the heat exchanger is good enough. Considering it's 28 years old and still runs fine, I don't think it needs one on the engine. Steve |
Zinc on Perkins 4-108
Steve wrote in
: Mine just had one on the heat exchanger. Since it's FWC, one in the heat exchanger is good enough. Considering it's 28 years old and still runs fine, I don't think it needs one on the engine. Steve The one on the heat exchanger is the only one on ours. Ours is indirectly cooled, too. Engines filled with antifreeze don't need zincs inside...just heat exchangers where the salt water's eating it away.... How many thousand hours is on your Perkins, Steve? The one we exchanged had over 6000 hours on the clock because the former owner thought an Amel Sharki was a trawler, I guess not noticing the 12 bags of sails she had... (c; Larry -- Democracy is when two wolves and a sheep vote on who's for dinner. Liberty is when the sheep has his own gun. |
Zinc on Perkins 4-108
In article h5Prh.9534$Wz.6778@trndny06, gordon
wrote: On my Westerbeke 4-108, there is a zink in the heat exchanger and that is it. check your heat exchanger. Typically, you only need zincs on the Seawater side of any Marine Engine Cooling System. If you are Raw Water Cooled, in a Single Loop System, then you would find zinc's in the Block, Exhaust Manifold Water Jacket, and Overboard Thru-Hull. For any Dual Loop Systems, you would look at the Raw Water side of the Heat Exchanger, and the Overboard Thru-Hull. For a Keel Cooled System, you would only find them on the external Keel Coolers. Bruce in alaska -- add a 2 before @ |
Zinc on Perkins 4-108
Bruce in Alaska wrote:
In article h5Prh.9534$Wz.6778@trndny06, gordon wrote: On my Westerbeke 4-108, there is a zink in the heat exchanger and that is it. check your heat exchanger. Typically, you only need zincs on the Seawater side of any Marine Engine Cooling System. If you are Raw Water Cooled, in a Single Loop System, then you would find zinc's in the Block, Exhaust Manifold Water Jacket, and Overboard Thru-Hull. For any Dual Loop Systems, you would look at the Raw Water side of the Heat Exchanger, and the Overboard Thru-Hull. For a Keel Cooled System, you would only find them on the external Keel Coolers. Bruce in alaska One on the fresh water side does no harm and offers *some* useful protection if there is a tiny leak in the heat exchanger. OTOH if everthing is working properly, it wont have *anything* to do. -- Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED) ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk [at]=@, [dash]=- & [dot]=. *Warning* HTML & 32K emails -- NUL: 'Stingo' Albacore #1554 - 15' Early 60's, Uffa Fox designed, All varnished hot moulded wooden racing dinghy. |
Zinc on Perkins 4-108
My 4-108 has 2. One in the heat exchanger (horizontal cylindar type abaft
the block) port side. I had to shorten the zinc. One in the oil/trans heat exchanger aft bottom small pencil zinc that has to be shortened as well. This one is in the coolant. - Allen |
Zinc on Perkins 4-108
On Fri, 19 Jan 2007 13:44:39 -0500, Larry wrote:
Steve wrote in : Mine just had one on the heat exchanger. Since it's FWC, one in the heat exchanger is good enough. Considering it's 28 years old and still runs fine, I don't think it needs one on the engine. Steve The one on the heat exchanger is the only one on ours. Ours is indirectly cooled, too. Engines filled with antifreeze don't need zincs inside...just heat exchangers where the salt water's eating it away.... How many thousand hours is on your Perkins, Steve? The one we exchanged had over 6000 hours on the clock because the former owner thought an Amel Sharki was a trawler, I guess not noticing the 12 bags of sails she had... Actually, I have no idea how many hours are on it. The PO replaced the hour meter and I never found out what the old meter said. In 7 years I put less than 200 on myself. I mostly sail and don't use the motor all that much. Steve |
Zinc on Perkins 4-108
Steve wrote in
: I mostly sail and don't use the motor all that much. Steve Us, too. The "newer" 4-108 we bought from a guy in NC off this newsgroup was mated to the old hydraulic transmission so we can still run our shaft alternator off the old engine. This new engine survived a massive flooding back through the exhaust when the stupid boatyard installed the wrong powerboat dripless bearing in the hull. They connected up the bearing's primer powerboats need to the Perkins' cooling water outlet....but the stupids didn't put in an anti- siphon loop! Cap'n and some others sailed it from Charleston to Key West offshore and had trouble starting it in Key West as it had water in the cylinders but got it going. I joined the boat when they all deserted him in West Palm Beach and we sailed offshore up to Ponce Inlet with a big heel angle all night. At the inlet, it wouldn't turn over, hydrolocked by seawater. Towboat US said we'd have to sail against the tide up the inlet's ripping tide before he could tow us, so the two of us sailed it up past the lighthouse on the genoa in traffic, just making it as the wind dropped. He towed us to Daytona Marina/Boatyard and a very nice guy from Cutter Doc (386-679-3414) deserted his family, on the weekend, to come at once to Lionheart to save the Perkins. He pumped the tar balls out of the crankcase, twice, and got the water out of the cylinders. After a "few oil changes", one new injector and one injector mount that had cracked trying to crank it (probably in Key West, he said), we got it running and ran it into the night to boil out any remaining seawater. More oil changes followed and the little tractor diesel runs like a top. Leaving the hose off the waterbox muffler, water was seeping into the system and he couldn't quite put his finger on why. He was really tired so I insisted he go home and sleep, leaving the water trickling into the bilge pumps late that night. After watching it for a while, I started kinking hoses around the engine and the trickling stopped when I kinked that new hose to the stupid dripless bearing. Before he got back Sunday morning, I'd taken two hose barbs and a plastic valve and cut the line to the engine to insert it. It's still in the line, today. If the boat comes out of the water for service, you open the valve to blow the bubble out of the bearing with engine power, then shut it back off to prevent it from backflowing into the Perkins to prevent flooding. Works great that way IF you make sure any stray mechanics going into the bilge are told to NOT open that valve as they ignore my warning sign. If anyone needs diesel service around Daytona Beach, I can't say enough good things about the guy who owns Cutter Doc. He serviced our emergency in spite of afterhours on weekend with a BROKEN FINGER from catching it in a belt that was running earlier in the day the day we arrived. That's real dedication to marine service. His motorcycle mechanic helpers with the earrings and various hardware in their appendages look a little strange, but they, too, were good mechanics. I'm suspicious when a mechanic arrives looking like a boat broker, all clean in his Jimmy Buffett dress beach clothes and big Panama hat w/Sperry Docksiders. Diesel mechanics never get clean hands. Larry -- Democracy is when two wolves and a sheep vote on who's for dinner. Liberty is when the sheep has his own gun. |
Zinc on Perkins 4-108
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