I have a 150 Mercury on a Cobra Boat its making a beeping sound when I try to crank it up or when i turn the key over to crank it.

There are two types of warning horns to alert the operator of an

active problem within the engine's operating system.

1. Continuous six second beep: Indicates a critical engine

condition. Depending on the condition, the Engine Guardian

System may engage and protect the engine by limiting its

power. You should return to port immediately and contact

your servicing dealer.

2. Intermittent short beeps for six seconds: Indicates a

noncritical engine condition. This condition does not require

immediate attention. You may continue using your boat,

however, depending on the nature of the problem, the

engine's power may be limited by the Engine Guardian

System (see Engine Guardian System following) to protect

the engine. You should contact your servicing dealer at your

earliest convenience.

FEATURES AND CONTROLS

eng 63

It is important to note that in either of the above scenarios, the

horn will only sound one time. If you key the engine off and

restart it, the horn will sound again, one time, if the fault is still

present. For visual display of the specific engine functions and

additional engine data, refer to SmartCraft Product information,

following.

The operator is able to correct a couple engine problems

indicated by the warning horn. These conditions are as follows:

• Cooling system (water pressure or engine temperature)

problem. The warning horn will sound Intermittent short

beeps for six seconds. Stop the engine and check the water

intake holes in the gearcase for obstruction.

• Low oil pressure problem. The warning horn will sound a

continuous six second beep. Stop the engine and check for

low engine oil level. Refer to Fuel and Oil - Checking and
Adding Engine Oil.

ENGINE GUARDIAN SYSTEM

The Engine Guardian System monitors the critical sensors on

the engine for any early indications of problems. Engine

Guardian is functional whenever your engine is operating, so you never have to be concerned about whether or not you are

protected. The system will respond to a problem by sounding the warning horn for six seconds and/or reducing engine power in order to provide engine protection.

If the Guardian System has been activated, reduce throttle

speed. The problem will need to be identified and corrected, if

possible. The system must be reset before the engine will

operate at higher speeds. Moving the throttle lever back to the

idle position will reset the system.