Where does the howling noise from the air intake come from?
Noise seems to be coming from air chamber going to the IAC valve. When power is removed from IAC valve noise stops but idle goes down real low. Could it be electrical?
When does the Mercury guardian horn turn off?
If Guardian System has been activated, reduce throttle speed. The horn will turn off when throttle speed is within the allowable limit. Consult your dealer for assistance. A Mercury SmartCraft System instrument package can be purchased for this outboard.
What causes overspeed on a Mercury SmartCraft?
Overspeed could be caused by incorrect propeller pitch, engine height, trim angle, etc. Engine Guardian System is activated. Power will be limited. The Engine Guardian System monitors the critical sensors on the engine for any early indications of problems.
Why does my Ford Explorer make a loud howling noise?
Loud howling noise but doesn’t start til the vehicle has been warmed up and is almost instant during the summer. Nothing alleviates the noise and it is extremely annoying. But there has been no decrease in performance due to it. Intake Howling. Replaced IAC, TPS, MAF, and howling comes and goes.
When to use an inductive tachometer on a Mercury outboard?
Inductive tachometers can be a real time-saver when trying to find a high speed miss by comparing the readings on all cylinders, i.e., if one or two cylinders shows a big difference in comparison to the other cylinders. The use of inductive tachometers is recommended for detection of double firing cylinders.
If Guardian System has been activated, reduce throttle speed. The horn will turn off when throttle speed is within the allowable limit. Consult your dealer for assistance. A Mercury SmartCraft System instrument package can be purchased for this outboard.
What should the wire reading be on a Mercury outboard?
The readings should be within 11/2 volts of each other, i.e., if one Wire reads 20 volts – the other has to read between 18 1/2 and 21 1/2 volts. If one Wire reads low, mark the Stator and rectifier Wire with the low reading, shut the engine down and swap Stator wires. Crank the engine up and repeat the test.
How to troubleshoot a Mercury outboard ignition switch?
Disconnect the Mercury Outboard switch and reset, if the engine fires, replace the Mercury Outboard switch. Check the voltage on the red and white Ignition wires at the CD Unit. If the voltage is less than 9 1/2 volts during cranking there is a problem in the battery s or the Ignition switch Box.