Thru-Hull Installations - Columbia Coronado 25 Owenrs Manual

5.4 (continued)
fitting together with a hose clamp. The ground wire must be installed
from the fill fitting to the tank to engine ground to prevent explosion
from static discharge, in accordance with the wiring diagram.
The fuel tank vent line is led from the tank to the engine compartment in
accordance with the plumbing diagram.
1. The hose must be led continuously up, so fuel is not
trapped, to a screened thru-hull vent fitting on the
transom and fastened there with a hose clamp.
2. Before the vent hose reaches the screened
fitting in the transom a loop should be made
in it, a size just large enough so it does
not collapse the hose. This is to keep any
sea water from backing up into the fuel.
The hose must then be secured to the deck
along its path with electrical ty-wraps every
14".
The exhaust system consists of a stainless steel flex hose, a water
jacketed exhaust pipe, a length of exhaust hose, a pipe loop, muffler,
which is a stock unit, and a thru-hull fitting. The exhaust system
location is shown in the hull assembly drawing.
The engine compartment ventilators are located in accordance with the deck
assembly drawing. The exhaust is a forced air system with the fan mounted on
the underside of the deck on the port side aft, and the intake on the
starboard side. Both are connected to 3" flex hose which leads to the engine
compartment, creating a complete air flow throughout the compartment and
around the engine and bilge. The output hose must lead to the lowest point in
the engine compartment. The input hose should lead to the opposite end and be
located high in the Engine Compartment.
Follow the wiring diagram to connect the engine.
5.5 THRU HULL INSTALLATIONS
1. Bore a hole of adequate diameter for the thru-hull device (Item
4) through the entire hull laminate
(Items 6 and 7).
SECTION 5
Page 9
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