electric fuel pump

spanishmak

Seaman Apprentice
Joined
Jun 15, 2010
Messages
46
I have rebuilt my primer solenoid and replaced all fuel lines in my 79 200 hp johnson it runs good,but man it can be a bear to cold start!I am really gettin tired of this solenoid issue and hear that I can put in an electric fuel pump and that it would take care of the problem.Can anybody tell me if this will work or not!!THANX
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: electric fuel pump

Have you ever heard the term "If it ain't broke" don't try to fix it? Lets start with your starting procedure -- as in what is it? For some reason many folks, and I mean no disrespect, simply have trouble figuring out how to start a carbureted two-stroke. Most of these starting issues begin with an incorrect starting procedure. Those primer solenoids are not a problem. Yes - they can leak or break but so can many other parts on an engine. Starting issues can also be due some other problem but the fuel pump and primer solenoid are not high on the list of reasons.

Next -- consider this. You install this electric pump, you start the engine, and at some point in time the engine dies. You don't turn the key off so the pump keeps running. You then hit the key and you get a KABOOM or you find the engine locked up, or you find the bilge full of fuel. When you install an electric fuel pump you need to also install a method that kills the pump if the engine is off but the key is left on. Do not try to convince me or others that you would "remember" to turn it off. Since a two stroke does not have an oil pressure switch there is no convenient way to incorporate this safety switch. So think very hard about this.
 

samo_ott

Vice Admiral
Joined
Jun 18, 2006
Messages
5,125
Re: electric fuel pump

Silvertip, maybe a quick tutorial on the starting procedure would be in order for all to read? I have never had an engine with a primer solenoid so I'm not the one to do it.
 

kenmyfam

Supreme Mariner
Joined
Aug 10, 2006
Messages
14,397
Re: electric fuel pump

Don't go electric is my 2 cents. Solve the real issue. Check top secret files and go from there.
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: electric fuel pump

Silvertip hit the nail on the head. DON'T put an electric fuel pump on an outboard. Too much of a fire hazard. Look for a prob someplace else.
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: electric fuel pump

HOW TO START A CARBED TWO STROKE:

1) Squeeze primer bulb until firm. Note that this is the first step and it is MANDATORY if your engine has a primer solenoid rather than a butterfly style choke.
2) Raise the fast idle lever about 1/3 - 1/2. If you don't know what this is, on most JohnnyRude and Mercs, it is the flat lever on the top of the control box. On an enclosed side mount where you see only the lever, there is either a button to push or you pull outward on the throttle/shift handle and then forward to provide fast idle without putting the engne in gear. Fact: Carbed two strokes need a little throttle for cold starting except if you own a JohnnyRude with the Quick Start feature.
3) Turn the key to RUN (not START).
4) Push the key in and hold it for a count of 8 to 10. You are priming the engine at this time which is why squeezing the primer bulb is the first step in this process. Failure to do that means the primer cannot inject fuel because there is no pressure in the system. It also means that the primer solenoid must actually be working. You know it is if you hear it click each time you push the key in.
5) Turn the key to START and for heavens sake, when the engine fires, pull the fast idle idle down a bit to avoid racing the cold engine. Be ready to bump the key (push it quickly) should the engine begin to die. Don't wait until it quits -- you know if it is slowing down because you can hear it. You may need to bump the key a couple times.
6) When the engine is running smoothly, lower the fast idle lever all the way and go boating.

The alternate method is to replace step 3 and 4 with this: Turn the key to START while pushing it in and holding it until the engine fires. Either way works. Every one of my personal engines start quickest with the count of 8 process. But they also start fine with the alternate procedure.

The fast idle lever can be used on warm starts as well -- especially if the engine tends to start and die a couple times before it stays running. Using the primer should not be necessary on a warm start.

Lastly, a primer bulb does not stay firm after the engine starts so don't get the idea because it goes soft something is wrong. Once the engine starts fuel is being sucked through the line -- it is not under pressure.
 
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