As I suspected. It does have a compression release or decompression lever(s). Make sure they are all to the outboard position (45°), not vertical. [cid:eu.faircode.email.13941]
May 18, 2024 03:38:49 Josh Muckley via CnC-List <cnc-list@cnc-list.com>: > I got "stuck rings" one year after I stored the boat in the water. The > theory being that when the engine stops the nature of the intake and exhaust > valves is to stop in a manner in which one or two of the cylinders have both > intake and exhaust not fully seated. As the boat rocks in the water the wet > muffler creates a water lock that pushes and pulls air through the engine via > the open intake and exhaust valves. Eventually enough humid air condenses > and collects on the cylinder walls and runs into the gap between the piston > and wall - thus the piston ring sees all the water collection. Enough time > and leak by and the second and third ring may see water too. More time > passes and the years of soot, carbon, motor oil, wear products, corrosion > products, and now water all mix to gum up the rings and stick them in their > current position. Well the first time you roll the engine in the spring the > piston rocks slightly as the angle of the connecting rod changes around the > crankshaft. This rocking motion jams the stuck rings in tight on one side > and then rocks to jam them in tight on the other side. The end result is > that the cylinder has low compression. Since all diesels require the heat of > compression to create the combustion, the diesel doesn't run. > > With glow plugs checking the compression is as easy as changing spark plugs. > > At first I was getting a very poor running engine and tons of blow by. > Eventually the engine died and could not be restarted. The solution was to > every day drip about 15ml of penetrating oil into each cylinder and roll the > engine. Roll it by hand and the oil doesn't get shot all over the place. > Roll it with the starter and the oil might make it to nooks and crannies > better. > > Compression for a diesel should be upwards of 400 psi. Two of my cylinders > were at 145-ish and the third was at 350. Once I was done and got the engine > running all the cylinders were 450+. > > So... > - I'm not sure if the universals have decompression levers but if it does, > double check they are not set to decompress. > > - Check that fuel is making it to the injectors by bleeding each injector > fitting while someone cranks the engine. Cone wrench is advised. > > - Check for intake suction by covering the intake air snout on the air > cleaner. > > - As others have said, check all the glow plugs are heating the cylinders. I > think it is the universals that have the old trailer harnesses, these are > notorious for losing connection and should be replaced with a terminal board. > In addition to the terminal board the glow plugs pull too much current for > the push button in the cockpit and a solenoid should be added so that the > current it carried there instead. With the terminal board and solenoid > you'll get hotter and more consistent glow on your plugs. Of course a > resistance check of the plug will verify functionality. Remember to > disconnect the plug terminal first. > > - Once those options are exhausted there is little left than to do a > compression check > > > All the best, > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Yanmar 3HM35F > Solomons, MD > > > May 17, 2024 22:19:32 Todd Williams via CnC-List <cnc-list@cnc-list.com>: > >> Looking for some input on my non starting Universal / Westerbeke diesel 5416 >> on my 1980 C& C 34. It was running great at the end of last year but no go >> from the start this year. >> >> It turns over great but no sounds of combustion. Battery is brand new. Oil >> and transmission fluids are at proper levels and fresh. It sounds like the >> glow plugs are working because the blower changes pitch with the increased >> current draw. Fuel looks good, checked pickup for debris, changed fuel >> filter, bled lines. I did have some electrical work done at the wiring >> harness but I don’t think that would affect it. >> >> I am thinking either I need to look at the injectors and injector pump or I >> need to do a compression test. I’ve read about both in online forums but >> haven’t had the “opportunity” to dig this far into engine troubles. Any >> input from the group on other diagnostic tests or possible sources of the >> issue? Thanks in advance. >> >> TODD >> Indigo Out We Go >> 1980 C&C 34 >> Saco, ME
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