Mercury outboard hard to start

I have to pump the primer bulb and continually play with the choke in order to get it to start. When it does it sounds great no issues and no hard idle.

Wait about 10 minutes and try starting again.

Mercury outboard hard to start. March 24 2007 at 118 am 1235046. I have a Mercury 115 ELPTO two stroke out board. Im having problems getting it started when the temp drops over night.

I have to pump the primer bulb and continually play with the choke in order to get it to start. Ive replaced the bulb and installed a new fuel pump kit and Im still having problems starting. My 88 60HP Merc does the same thing.

To start it in the morning Ive got to put the throttle lever 13 the way up choke it and hold the choke in for about 10-15 seconds after it fires. If I stop the motor for more than 5 minutes I have to raise the throttle lever a little and choke the motor for it to start. If your outboard motor doesnt start on the first or second pull then it needs a little tweaking.

This engine works great once it starts but it takes too ma. Mar 15 2005. I have a 1979 115hp mercury outboard that is hard to start.

If it sets for a day I have to pump gas in the carbs with a oil can. The choke works the primer bulb works I can here gas being pumped into the carbs. Plugs have been changed.

I have a hard time starting my 1999 Merc 2-stroke 25HP and cant figure it out. It takes anywhere from 15-25 pulls on the starter rope to get going but from then on it starts on the first pull the rest of the day. Heres the history of the engine and maintenance to help narrow things down.

Hey guys so I have a 90s 90 HP Merc outboard with a keychoke ignitionIm new to boats but pretty mechanically proficient. Ive been having problems starting the boat. The engine will crank and crank and crank and start to fire but will often die.

Eventually I can crank long enough that it fires and starts chattering away. When it does it sounds great no issues and no hard idle. Over time it was getting more difficult to start.

I finally went online and found the correct way to start a Mercury. 1 Prime bulb 2 Trim engine vertical 3 Move throttle forward once to full position then back to fast idleneutral position. 4 push in key to activate choke and turn keyDamn if it doesnt start on first try every time now.

Turn the key until the outboard turns over. You might notice that it chokes or is slow in starting. If it has trouble like this move to step five.

Add ethanol treatment for outboard engines. This helps the engine deal with gasoline that has high ethanol content up to 10 percent. Mercury outboard cranks but will not start refers to when the Mercury outboard motors crankshaft turns but will not cause the motor to begin to work or may.

There can be many reasons why a 99 horsepower Mercury outboard will not activate. Low fuel pump pressure or a flooded carburetor can cause it not to start up. This troubleshooting guide will help you determine why your 99HP Mercury boat motor wont start.

Mercury outboard 4 stroke 75HP carburated hard starting - Answered by a verified Marine Mechanic We use cookies to give you the best possible experience on our website. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Diagnosing an outboard that wont start.

If playback doesnt begin shortly try restarting your device. Bottom line is that if it is corroded like his was the EFI senses some how that the engine is warm and does not distribute the right fuel amount for your cold start problem. Simply take off the lower unit.

Good time to check water pump. I have a 2003 90hp 2 stroke mercury 350hrs on clock when starting from cold i have to keep choking it by pushing key in for a second until revs pic up revs will die down again after about 5 seconds then choke it again this can go on for 2-3 minutes until it will idle on its own any ideas on what could be the problem motor runs and starts fine once warmed up. 150 xr6 hard to start 09-15-2012 0501 PM the motor runs fine but is hard to start have to put the cold start up every time i start it.

Even after it is run. Wait about 10 minutes and try starting again. Do not use the choke open the throttle all the way and try starting again it will usually take at least 2 to 3 pulls.

If it doesnt start with a half dozen pulls wait 10 minutes and try again. Sometimes after flooding it will start and then die. The 25 HP Mercury we bought for our Sun Dolphin Mini-Bass Boat was very hard to start.

We decided to make a video about how to start it. There is nothing. I have a 90hp Mercury that is VERY difficult to start cold.

I may go a few weeks between outings which doesnt help. But in order to insure a start I crank it up in my driveway using the earmuffs the day before I plan to take it out and make sure I have a fully charged battery. Ive heard Mercs are hard starting but this is ridiculous.

I had a Mercury that acted similarly. In this case I think pumping the bulb to much was flooding the engine. I installed a low pressure electric fuel pump.

I could turn the pump on for seven seconds and the engine would start. After the first time you could not bump the switch without it starting. Lets start with the basics.

How to Start a Mercury Outboard Motor. Mercury makes a 2-stroke and 4-stroke engine. The 4-stroke engines have risen in popularity due to their reduced noise fuel efficiency and greater longevity.

Because theyve grown in popularity in recent years most of them tend to be newer. Typically theyre as easy. Outboards start like a car.

Just tilt them down and turn the key. At least newer ones do. But it wasnt always that way.

In the past you had to learn how to start an outboard motor. Carbureted two-strokes can be fussy especially when cold. And if you ever cant get one start check out our 25 reasons why your boat engine wont start.

I have a new 50 hp 2 stroke on my flats boat. Hard to start cold. Pump up the primer ball 5 or 6 times then it takes several attempts to start.

Really hate grinding the started. Fast idle lever doesnt help. Pushing key switch does nothing.

Understand it has an automatic choke I miss the toggle switch choke control on my old one. Every time i take this boat out the same thing happens when trying to start this motor Mercury 75hp. It cranks and acts like it wants to start but it will take many turns of the key before it actually fires up sometimes it will start up but only stay running for a few seconds.