How to troubleshoot a Mercury outboard engine?
Check for a dirty or old spark plug, improper carburetor adjustments, or broken or faulty ignition wires. Air vent in fuel cap not open. Faulty emergency kill switch. Some engines — not the pull-start kind — have a battery that starts it.
What does idle control valve do on Mercury Sable?
Idle control valve makes the idle high and with foot off the accelerator car runs at 40-45 MPH. I disconnected the electrical plug to the valve and car runs great! Car starts,but dies immediatley when take foot off gas. When pressing on gas, will die if I dont rev engine.
Why does my Mercury Sable stall at 2, 000 rpm?
Rough Idle problem, be careful WRONG Idle Control valves IAC are being sold for this year model, that cause super high idles over 2,000 rpm then settles down. Looking inside it, it has a little brass shaft with a spring extending out.
How many horsepower does a Mercury outboard motor have?
Mercury Marine, based in Wisconsin, has been making Mercury outboard motors in two- and four-stroke versions ranging from 2.5 to 350 horsepower for more than 75 years, though the company’s first motors did not have as much horsepower as some of its current motors.
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.
Which is the best forum for Mercury outboard problems?
This is the best Mercury Outboard Forum on the internet, it’s yours! If you own a Mercury Outboard. Are you looking for good advice about your Mercury outboard engine problems and issues.
Why does my mercury 115 EFI not start?
My mercury 115 EFI four stroke develops an engine miss at around 5000 rpm. The rpm drops approx 200 to 400 rpm. This miss comes and goes. It appears … cold Engine cranks quickly but does not start. will start if using starting fluid. carbs rebuilt. new fuel,new squeeze ball, electric choke. new plugs …
What causes a Mercury outboard engine to overheat?
Outboard motors pull water from the lake, river or ocean through an intake to keep the engine from overheating. Debris in the water can get stuck in the intake and cause the engine to overheat. Check the intake for clogs.
What is the throttle position sensor on a Mercury 150 175?
This troubleshooting information is meant to help trace and correct faults relating to the throttle position sensor on 2000+ Mercury 150 175 200 horsepower EFI engines with a starting serial number of 0T409000 and above. A throttle position sensor, or TPS, is a device which is used to monitor the air intake of an internal combustion engine.
My mercury 115 EFI four stroke develops an engine miss at around 5000 rpm. The rpm drops approx 200 to 400 rpm. This miss comes and goes. It appears … cold Engine cranks quickly but does not start. will start if using starting fluid. carbs rebuilt. new fuel,new squeeze ball, electric choke. new plugs …
How can I find out if my Mercury engine is under warranty?
Using the serial number of your engine, your local authorized Mercury dealer can quickly and easily check your warranty coverage.
How long is the warranty on a Mercury MerCruiser?
MerCruiser sterndrives, inboards and tow sport inboards have a standard limited, non-declining warranty. The length of warranty coverage can be one, two or three years depending on the model. Please refer to our Warranty Coverage Chart or contact your local authorized Mercury MerCruiser dealer for more details.
Where to find the serial number on a Mercury outboard?
You can find your Mercury outboard serial number and model number on an ID tag on the mounting bracket, or in some cases on an engine block freeze plug. See below for a Model Number Description Guide and Serial Number to Year chart. Extra long shaft (25″/635mm) driveshaft housing.
When does an engine have to be registered with Mercury?
In either case, your engine must be registered with Mercury within fifteen (15) days from the date of purchase. You can check to see if your engine is eligible for a Mercury Product Protection Plan by contacting your local Mercury dealer.
Why does my MerCruiser engine not want to restart?
After running the boat and shutting the engine off for 1 to 3 hours, the engine does not want to restart. Fuels containing alcohol and ‘winter grade’ fuels will cause vapor locking complaints to increase. NOTE: The new ‘Reformulated’ fuels have the RVP (Reid Vapor Pressure) very carefully controlled.
What causes vapor locking on a Mercury MerCruiser?
All Mercury MerCruiser 4 Cylinder, V6 and V8 engines. Under certain conditions, engines may experience a ‘vapor lock’ condition. The three most common complaints that vapor locking cause are: The engine starts. When the throttle is advanced, the engine quits running and will not restart.
What’s the maximum vacuum in a Mercury MerCruiser?
Mercury MerCruiser’s specification for the maximum vacuum measured at the fuel inlet of any MerCruiser engine is: 2 in. Hg (7 kPa) maximum at idle rpm, 3000, full throttle and back at idle rpm.
Why does my MerCruiser engine not come on?
Most come on for about 5 seconds when the key is first turned on. If you have an electric fuel pump and you don’t hear it making any noise when the key is on, you might have a bad fuel pump.
Mercury MerCruiser’s specification for the maximum vacuum measured at the fuel inlet of any MerCruiser engine is: 2 in. Hg (7 kPa) maximum at idle rpm, 3000, full throttle and back at idle rpm.
All Mercury MerCruiser 4 Cylinder, V6 and V8 engines. Under certain conditions, engines may experience a ‘vapor lock’ condition. The three most common complaints that vapor locking cause are: The engine starts. When the throttle is advanced, the engine quits running and will not restart.
What to do if your electric engine won’t start?
Electric fuel pumps can easily go bad from just sitting. The fuel turns into varnish and the pump fails. If you are going to let your boat sit for 6 months or more, you should run Fuel Stabilzer through the fuel system. The Fuel Stabilzer will keep the fuel from ruining the fuel pump. Electric fuel pumps make a whinning noise when they run.