Westerbeke 50 Manual de usuario descargar pdf

Tartan 37 Technical Resources

Chapter 3: Engine, transmission and prop

Section 5: Engine Overheating

Contributed by John Harvey, #16 New Day

Engine Overheating

Mashed up by John Harvey (New Day, T-37C #16) from notes by Jim Voelxen (Odyssey, T-

37C #191), Gary Van Voorhis (Recess, T-37 #321), Mike Civello (High Flight, T-37C #299) and

others found in the T37 Forum.

There are two independent water circuits in the diesel engine; the fresh water/coolant mix

circuit that picks up heat from the engine and the exterior water circuit that dumps the heat

overboard. These two circuits are connected only at the heat exchanger. Either one or both

can malfunction and cause overheating. To keep them distinct, we will call the fresh water/

coolant mix the 50:50 circuit and the exterior water circuit we will call the raw-water circuit

(“raw” because it depends on what the boat is floating in).

When troubleshooting an overheating problem, as Yogi Berra once put it, “You can observe a

lot just by looking.” The exhaust water flow observations that follow may pinpoint the problem.

However, there may be no one thing that fixes the problem. Past experience shows that

overheating can be caused by a number of small problems, on their own not significant, but

when combined cause overheating. For our elderly T-37s with original engines it will be wise to

perform all these checks and repairs at least every five years.

This tech note is mostly generic material but when specific to the particulars of either of the

Westerbeke 40 or 50 engine is so noted.

----------------------------------------------------------------------------------------------------------

** When an engine overheats, first check the raw-water overboard discharge (exhaust):

If there is No Flow or only a dribble, the most likely causes of overheating are in the raw-water

circuit:

Ensure the raw-water intake valve is open.

The raw-water intake is blocked externally. Check for a plastic bag, a clump of sea grass, or

other material covering or plugging the inlet.

Clean the Intake Thru-Hull. Years of bottom paint may partially block the intake strainer on

the thru-hull. Remove it, scrape out any blockage and clear the slots with a screwdriver.

Inspect and clear the thru-hull.

This information is based on the experience of Tartan 37 owners, and is made available as a convenience to other owners. Individual

boats and experiences may vary, and neither the Tartan 37 Sailing Association nor the owner(s) presenting this information assume any

responsibility for conditions resulting from its use on other boats. By downloading this article, the user acknowledges that any

information contained herein is used at his/her sole risk.

1 2 3 4 5 6 7

Indice de contenidos

Pagina 1

Tartan 37 Technical Resources Chapter 3: Engine, transmission and prop Section 5: Engine Overheating Contributed by John Harvey, #16 New Day Engi

Pagina 2

The raw-water filter or strainer is clogged with sediment, sand, goo, grass, or living critters such as jellyfish and algae. Open and clean it out. I

Pagina 3

exchanger will reveal the cause of overheating. The entire raw-water cooling system should be flushed periodically to remove salt and sediment deposit

Pagina 4

The coolant level is low. The level of the 50:50 mix of antifreeze and water should be checked routinely, and more coolant should be added as needed.

Pagina 5

*Tip for the finicky owner* Most conventional coolants will be green, "low-silicate" and meet ASTM D4985. There are too many brands to list

Pagina 6

Find the hose coming out of the water heat exchanger going to the galley water heater from the water heater end and install the correct end of the 5/8

Pagina 7

The engine is overloaded: A rope may be wrapped around the propeller shaft, the boat’s bottom may be foul, the propeller could be fouled, and so on.

Comentarios a estos manuales

Sin comentarios

Westerbeke 50 Manual de usuario

Busca en linea o descarga Manual de usuario para Motor Westerbeke 50. Engine Overheating Manual de usuario

Indice de contenidos

Comentarios a estos manuales

Relacionado con productos y manuales para Motor Westerbeke 50