Fuel Pumps - CORRECT CRAFT Sport Nautique Owner's Manual

obtain correct tension.
• After correct tension has been set, tighten mounting bolts.
Adjusting Alternator Drive Belt Tension
• Check belt tension by pushing down on the upper strand of the belt at a point
midway between the alternator pulley and the circulating water pump pulley.
• Belt should depress 1/4" (6.35mm). If it depresses more than 1/4", adjust the
tension by loosening alternator mounting bolts and pivoting the alternator to
obtain correct tension.
• After correct tension has been set, tighten mounting bolts.
If at any time you are unsure of the proper checking or adjusting procedures
consult your Correct Craft dealer for guidance.

Fuel Pumps

There are three different types of fuel pumps currently used on PCM engines.
The three types are:
1) Mechanical
2) High Volume Low Pressure Electrical (Feed)
3) Low Volume High Pressure Electrical (Injection)
Mechanical and low pressure electrical pumps operate at 5 to 7 PSI, while
high pressure pumps operate at 30to 45 PSI, depending on the engine model.
Electrical Fuel Pump
The electric fuel feed pump used on all PCM engines is a high volume, low
pressure, constant flow, rotary vane pump. It is a fully sealed marine approved
fuel pump. The power source is 12 volt negative (-) ground and the pump
operates at less than 5 amps.
When the ignition switch is turned on, the ECM closes the fuel pump relay
causing the fuel pump to run.
If the ECM does not receive ignition reference pulses (engine cranking or
running), it shuts "off" the fuel pump relay, causing the fuel pump to stop.
An inoperative fuel pump relay will result in an "Engine Cranks But Won't
Run" condition.
PCM Fuel Control Cell
An inboard marine engine with electronic fuel injection can encounter several
problems with fuel delivery which can cause poor performance or even result
in an engine that will not run. A few of the problems which can occur due to
an improperly designed fuel delivery system are:
1.) Vapor lock
2.) Debris in the Fuel
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