What causes an outboard motor to sneeze?
Outboard motor sneezing is an audible result of a lean fuel mixture resulting from problems in the carburetor. Described variably as a sneeze, cough or stutter, an outboard motor or any engine will lose its ability to run smoothly if it does not receive enough fuel. In small engines, the culprit is the carburetor.
How can Hardin marine recalibrate your Mercury ECU?
Hardin Marine can recalibrate your Mercury ECU (computer) to yield the very most of your engines power The ECU precisely controls fuel requirements, detonation control, idle speed and RPM limitations We have dyno-tested multiple combinations and know what works!
What kind of ECU does a marine engine need?
Designed specifically for marine engines, Maxvolt Performance worked with a team of marine electrical engineers to create a product this simple and gets the job done. There is no cutting or splicing of wires; everything is plug and play! And there are three ways to play! Your engine can be Aggressive,Mild, or Basic:
What causes hard starting and rough idle on a Mercury?
Faulty Air Temperature Sensor: Will cause hard starting and rough idle. Air temp sensor should be checked with an Ohm Meter with a Cold Start Ignition Test. *ACU and PCU only. Incorrect fuel pressure: Can be caused by a bad fuel pressure regulator, or restricted return. On Laser EFI motors, look under the Fuel Pressure Regulator.
Can a marine engine control unit be repaired?
Since 2002, Marine ECU Repair has been the trusted source for prompt service and repair of automotive and marine engine control units (ECU’s). We make the repair process easy while providing fast and reliable service. Your malfunctioning module will be rebuilt by our qualified technicians using only certified OEM components.
Why is my Mercury outboard engine not firing?
It is starting and running, but the engine does not sound like all the cylinders are firing. It sounds like it tops at 4000 rpm instead of 5500 rpm. Only going 30, the cooling system is working ok, and it idles fine, just when trying to cruise it is not getting the speed it should. It is also slow off the line.
How does the ECM work on a boat?
The ecm is speed density based in your boat. This means it uses vacuum and RPM to determine the correct amount of fuel. Wingnut is right on with the fuel pressure. I would also look at a vacuum gauge while the engine is running.
What kind of fuel can you use in a Mercury engine?
Answer: Fuels containing up to 10 percent ethanol are considered acceptable for use in Mercury engines. Fuels containing higher levels of ethanol are not considered acceptable for use, and the use of fuels containing ethanol higher than 10 percent can void the warranty.
Can a two stroke outboard be run on ethanol?
Two-stroke outboards should experience little or no decrease in performance due to gasoline fuels containing up to 10-percent ethanol when operated according to Mercury’s standard recommendations.