Evinrude Fuel Problem

[eula30]

Hi, I have an Evinrude 90hp 1986 model: E90TLCDC. My problem is this: Motor start when I push the ignition key to prime it, then it will stay running for about 30 seconds and will go off ageing, Now when I push the ignition key to prime the motor, motor will start again and it will go off ageing after 30 seconds but if before the motor go off ageing I push the ignition key to prime it will stay running, so to keep the motor running I have to keep using the ignition key to prime the motor, Like that it can run all day. Does this motor come with a full pump? Please any advise or any Help I will really appreciated.<br />Thank you

 

[Yepblaze]

Re: Evinrude Fuel Problem

Heck yes it's got a fuel pump, and probably a filter too.<br /><br />Another thing might be bad orings in the fuel line connector(s).<br /><br />Have you tried to have someone squeeze the primer bulb to see if it will stay running? If by squeezing the bulb the motor stays running I would suspect the abve mentioned items.<br /><br /> Yet if squeezing the bulb doesn't seem to help (by overiding the fuel pump) you should start looking towards carburator adjustment or repairs.

 

[eula30]

Re: Evinrude Fuel Problem

Tank’s Yepblaze an oring was missing on the fuel line connector, Maybe That is the problem, I will try it tomorrow, and let you know<br />Thank you

 

[eula30]

Re: Evinrude Fuel Problem

Hi guys is been 6 or 7 months and I have an update for you. Please help me on this one. Thank you. I went dolphin fishing (Mahi Mahi) out early in the morning when I got to the spot (5 miles) motor die on me, for some reason the motor will start when I push the key in to prime but will go off ageing. I did try my spare portable fuel tank and still no lock so I try pressing the prime bulb but didn’t help either so I had to call in tow boat us.( Glad I am a member $$$$) We wore drifting east without motor not a good Idea so any way I replace the fuel pump about 5 months ago and motor was fine until today. Any idea why this is happening? Last time the motor has this same symptoms, I manage to come back to shore by pressing the prime bulb and that is why a mechanic told me that my fuel pump was bad, I did replace it and it was working fine until today. I went to buy another fuel pump today but the salesman told me that if I press the prime bulb and the motor will still go off that means the carb. needs to be Clean or rebuilt and the fuel pump wore fine. Any help I will really really appreciated.<br />Thank you

 

[imported_Warren]

Re: Evinrude Fuel Problem

The first thing you need to do is order the manual for it. It'll save you $$ and could save your life if your radio goes dead on the water. Get yourself a carb rebuild kit. Thats what I did to start. If thats not the problem you needed to do it anyway. You need to check the fuel pump also but am not sure if you should attempt it without the manual....Don't want to give you any bad advice....Good luck and be sure to post what the problem was......Warren

 

[rodbolt]

Re: Evinrude Fuel Problem

hello<br />I think your confusing the terminology. your outboard has a fuel primer bulb in the fuel line between the fuel tank and the engine fuel pump. its sole function is to ensure the carbs and fuel lines under the hood are full of fuel at start up. other than that its not nessasary and is just along for the ride.<br /> the engine fuel pump moves gas from the tank to the carburators while the engine is running. now your motor also has a fuel/air enrichment system to aid in cold starting sometimes called a choke or a "primer". it used to be an actual plate that closed in front of the carb venturi and intake vacum would pull extra gas from the main carb circuit anytime the plate(choke) was closed. however, your engine actually has no plate and hence no "choke". your engine has a solinoid operated valve that acuates when the key is in the on position and pushed in. when these two conditions are met the small lines going from the soliniod to the tops of the carbs spray a small steam of gasoline into the reeds behind the carb throttle plates. and will continue to do so as long as 3 conditions are met. 1 is the key is on. 2 is the switch is pushed in and 3 there is a supply of pressurized fuel from the fuel pump. if the system is capeable of working and the 3 above conditions are met it will spray an extra amount of gasoline into the reeds and bypassing any and all carb circuits. so lets review what ya said. the motor will run when the "choke" also called a primer but not the primer bulb, remember this is a seperate thing, is pushed. now that means we have 3 things,1 we have the key on,2 we have acuated the solinoid valve and 3 we have gasoline under pressure from the fuel pump. so that just eliminated the fuel primer bulb and the engine fuel pump cause we know positivly we have fuel under pressure cause it runs. now since we took the carburator idle,intermediate and main circuits out of the engine running loop and it will run while the solinoid is activated it will lead me to belive I have water in the fuel bowls or trash in them or the needles are sticking. its rare to have both needles stick shut. I would suspect water in the fuel bowls. on your engine ALL fuel that gets metered through the carbs comes through the main jets first. if they get blocked with a few drops of water the carbs quit metering fuel. maybe this will give ya a place to look.<br /> good luck and keep posting<br />PS sorry for such a long post

 

[eula30]

Re: Evinrude Fuel Problem

Hi guys, I do have the manual and Carburetors wore rebuilt about 6 month a go. You think I should rebuild them ageing? Rodbolt: Now that you mention water on the carb I did install about 3 months ago a Mercury Fuel filter/water separator I have an Evinrude 90hp I don’t know if that makes any difference. If I got water on the fuel line how can I prevent that from happening again? How often the Fuel filter/water separator need to be replaced? What is water in the fuel bowls means? <br />Thank you

 

[eula30]

Re: Evinrude Fuel Problem

????

 

[Solittle]

Re: Evinrude Fuel Problem

You need to confirm whether or not water is the problem. Dump the contents into a glass jar and take a look. I replace my filters once a year.

 

[eula30]

Re: Evinrude Fuel Problem

I just dump the fuel in a glass bowl and there was water in it and a lot of dirt came out from the water separator also. Now I check the water separator part number: 35-60494-1 and it said mercury replacement part. I have an Evinrude 90hp 4 cylinder. Is that will make any different? If I have a water separator for mercury and the motor is Evinrude will that make any different at all. Should I buy the omc water separator instead? I haven’t started the motor yet because I want to start taking care of the water separator first then I will go from there. I will really appreciate any help. <br />Thank you

 

[rickdb1boat]

Re: Evinrude Fuel Problem

Brand of Water seporator brand does not matter.

 

[rodbolt]

Re: Evinrude Fuel Problem

hello<br /> dude<br /> flush the carbs. you can injest enough moisture to trash a motor with water in the carbs. I really dont care if the carbs were rebuilt yesterday, if they have water and trash in them ya have to do it again. the filters normally get changed every 100 hours of service or once per year. in your case you seem to have excessive trash and water in the tank. time to clean the tank. but if not then check it every 10 hours or so. racor makes a spin on filter with a drainable fuel bowl that I try to get most customers to use and drain it at the start and finnish of each day. each carb has a fuel bowel that holds gasoline for the carb to meter. its almost like having 2 2bbl carbs. the merc part number is fine its just that the seperator will only hold so much water then it passes it on to the carbs. <br /> good luck and keep posting

 

[rickdb1boat]

Re: Evinrude Fuel Problem

Maybe you could put 2 or 3 water filters inline on there. Bet that would catch the water and trash. Just dump them all every day and put a new filter on each one and you should be good to go. Make sure you have plenty of filter elements and make sure you clean the tank soon.....