Two 1/4” fuel lines run between the tank and the engine. One provides
fuel to the engine and the other returns unused fuel from the engine
back to the tank.
The engine cooling and exhaust systems combine to maintain even engine
running temperatures by absorbing and expelling the heat that builds up
in an engine.
The engine manual illustrates these systems in more detail, however,
briefly they can be described as follows:
The sea water pump on the engine is driven by the crankshaft V-belt. It
draws in sea water through a Spartan strainer thru hull fitting in a
3/4" seacock. On boats after #006, this has been changed to a 1"
seacock with 7/8" hose adapter.
The cooling sea water passes through the heat exchanger on the engine
drawing heat from the fresh water cooling system which then cools down
the engine. The then heated sea water is expelled into the exhaust line
where it mixes with and cools the exhaust gases down before being blown
out the exhaust port in the transom.
Immediately after starting the engine, check to see that water is being
expelled from the exhaust port in the transom.
If it isn't, not only will the engine block overheat but the exhaust
system will overheat as well. If the engine is started with the seacock
closed or water obstructed in another way, damage to the rubber impeller
will result. A spare impeller should be carried aboard at all times and
is easily changed. The routing of the exhaust hose should not be
changed or problems may develop. For winterizing the exhaust system, a
drain plug is fitted to the exhaust muffler allowing it to be drained.
VIII. ELECTRICAL SYSTEM
12 VOLT DC SYSTEM
The Cape Dory 270 standard electrical system is powered by a 12 volt 75
amp hour battery located in a battery compartment below the
quarterberth. It is negatively grounded to an external ground plate
located below the cabin sole trap inboard of the galley.
All wiring is plastic coated stranded copper wire, color coded and
numbered for ease of identification. Connections are made with crimp-on
butt connectors or terminal ends and sealed with silicone grease to
prevent corrosion from moisture.
The standard battery is encased in a high impact, corrosion resistant
case. It is important that a full charge be maintained at all times.
www.capedory.org - 29 -
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