Help! 2003 Johnson Won't Run!

[srssrs]

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FOLLOW UP TO ANOTHER THREAD (2001 Johnson 115 starting problem - fuel?)

OK - I've replaced the fuel, changed the fuel filter, cleaned all 4 carbs thoroughly, cleaned & inspected all jets, tubes, etc.

This engine is a 2003 model (not 2001) and had very little varnish, etc. It has about 150 hrs. on it and the carbs looked very clean, like new even in the fuel bowls.

The engine cranks & fires immediately, runs about 7-15 secs. (about 600-800 rpm) then quits, unless I press in on the key. I can keep it running if I press in on the key just before it starts to die.

I have checked the solenoid that injects the fuel and it works fine (of course). After it quits, if I pull the plugs in the bottom of each fuel bowl, each has the normal amount of fuel in them. When I checked the spark plugs they appear to be a little wet.

I am reluctant to rev the engine past 1500 rpm in the driveway on a hose.

This engine has oil injection. Can I connect a separate fuel tank (portable 6 gal.) with raw fuel or do I need to add oil so it is pre-mixed?

Can anyone suggest something I've missed or have other ideas as to my problem? The engine sat for about 6 mos. with no use in So. FLA. I never have experienced this till now.

 

[razorreilly09]

Re: Help! 2003 Johnson Won't Run!

Im having the same problem with my 03 150, it all started when I was 30 miles offshore then just stalled, I started it back up and went for about another 30 min or so, then the intervals just got shorter, now it will only run for about 5-7 seconds on the hose and I can start it back up and it does the same thing, I replaced the sparkplugs, fuel filter, cleaned the in line filter, Im ruling out bad gas/water due to the fact that I was running it for about 1.5 hours before it started doing it. A mech told me to disconnect the kill switch in the ignition; yellow/black wire but that didnt help, I cannot keep it running in anyway. Maybe someone can give us some help.

 

[srssrs]

Re: Help! 2003 Johnson Won't Run!

"bump"

 

[Chris1956]

Re: Help! 2003 Johnson Won't Run!

Since it runs with periodic blasts from the primer, it sounds like th idle mixture is too lean to keep it running. You might open up the idle mixture needles 1/8 turn and see if that helps.

 

[srssrs]

Re: Help! 2003 Johnson Won't Run!

Thanks Chris,

Are the idle mixture needles the ones attached to the intake manifold where the butterflys are located? Each of mine are set at 4 turns open from the closed position.

I actually found the main problem early this AM. I pulled all 4 carbs as well as the manifolds & recleaned the idle pick-up tubes inside the fuel bowls. These were open but not fully open so recleaning was necessary - used a thin piece of rigging wire and carb cleaner. I also used a spray bottle to spray fuel thru the side of the carbs until it flowed freely thru the pickup tubes (small thin brass tubes).

After reassembling everything the engine fired on the first try & now idles smoothly but at about 1000 rpm. As I recall it used to idle about 600 rpm. Is 600 about right? If so, do I begin to close each needle in each carb about 1/8 turn closed until it reaches the proper rpm? Or is there another method? It seems that my butterflies are already fully closed and I cannot see any other way of adjusting the throttle linkage to accomplish this.

What is the best way to check my ignition timing as I have adjusted slightly the settings on the top of my flywheel housing?(I should have left these alone or at least marked them before moving very slightly). There is a small black plastic piece marked low and another plastic pointer. Each can be set independently by loosening one screw on the top of the flywheel housing that holds these together tightly in place. They can be adjusted from left to right and there is an indicator of + and -.

Thank you again for all responses to my posts - you guys are great.

Steve in FL

 

[HighTrim]

Re: Help! 2003 Johnson Won't Run!

Always set your idle on the water in gear under load, about 650 i believe . Sounds like idle mixture or high speed jets since the blasts of the primer wake her up.Make sure there is no restriction in the line from the bulb to the motor. (Make sure the bulb is pointing the right direction too) No kinked line, the "in" and "out' on the water seperator are right etc.

Follow Joe Reeves carb adjustment thread in the FAQ section to properly set it. When cleaning if you dont have the tool to remove the jets, you can easily make it (do a search on this) or use mechanics wire to clean them out. Air and soaking alone isnt enough. GL

Here is a link for Joes thread

http://forums.iboats.com/showthread.php?t=167352