1998 johnson115 j115tslecm dies when throttling up.

[Baker123]

Good day all. Having a problem with 1998 Johnson. Motor dies when engaging throttle. Replaced fuel pump, filter and all lines to carb. Seemed to help, but it still dies when trying to get on plane. Any suggestions?

 

[Baker123]

Should also note.... changed out plugs, switched to new tank, added and let run with heavy seafoam mix. Sounds great to start, idles well and can add power while choking with key press. Once I stop pressing key (with any throttle) it dies again.

 

[racerone]

Model # is ?---There are 2 different 115 HP models in 1998 year.------Pressing the key in opens the primer solenoid.-------That puts fuel into the engine and this fuel bypasses the carburetor metering circuits.-----This seems to suggest that the carburetors need attention !

 

[Baker123]

Thank you for responding. Model j115 TSLECM.

That and the fuel pump/filter/old lines were my first thoughts. Pulled them off and cleaned everything (stopped short of detailed disassembly of the carbs as they really did not look bad at all). Added 1/2 can of sea foam to an ext tank and have let sit and run several times. The first sea foam treatment really caused sputtering and coughing out some serious film (so to speak). Now it Idles and runs low throttle strong. Had really hoped that the basic hose, pump and cleaning would bring it back. Seemd close.

If I pull the carbs again, I’m guessing a total rebuild Is what you are saying? Little outside my pay grade, but knowing where it is is helps me to move forward.

Thanks again for taking time to help me with direction.

 

[Bryancampbell685]

Help I'm just looking to see if there is an overhual KIT for my 74 evinrude powerhead. 40454 s it has low compression or I guess I'll just order parts separately

 

[Straightup]

Model # is ?---There are 2 different 115 HP models in 1998 year.------Pressing the key in opens the primer solenoid.-------That puts fuel into the engine and this fuel bypasses the carburetor metering circuits.-----This seems to suggest that the carburetors need attention !

I'm having the same problem with my '84 Johnson 70 Looper.. Thank you for your post. - Jeff

 

[Baker123]

How far did you get into the carbs, Straightup? Also. Did you replace all fuel lines to the carbs and clean out any gunk/particulates?

 

[havoc_squad]

How far did you get into the carbs, Straightup? Also. Did you replace all fuel lines to the carbs and clean out any gunk/particulates?

If you want to know the proper steps for rebuilding the carb you have, I highly recommend you buy a factory/OEM service manual and follow it.

It takes three key things for a proper carb rebuild:

1. Take it completely apart per OEM service manual, including the Welsh Plugs and re-assemble correctly per service manual. Buy a geniune OMC/BRP carb rebuild kit with carb/intake manifold gaskets, not aftermarket. You take a significant gamble on many aftermarket marine carb rebuild kits.

2. Set the carb linkage correctly per OEM service manual for the link and sync procedure.

3. Verify the throttle cable linkage is set correct and you have the correct pre-load pressure to return the throttle arm back to its stop to minimum idle.

I'm having the same problem with my '84 Johnson 70 Looper.. Thank you for your post. - Jeff

I don't know why you'd be asking him right now Baker123, it looks like he's stuck where you are with his hands full.

Not to mention that's not even close to your model of engine.

 

[Straightup]

How far did you get into the carbs, Straightup? Also. Did you replace all fuel lines to the carbs and clean out any gunk/particulates?

Havoc squad is correct. I haven't been able to do anything with mine yet. I have a busy few weeks ahead, so no work on mine for a while. I'll keep looking at this thread to see how your carb rebuild goes. - Jeff

 

[oldboat1]

Baker -- nix on any more seafoam. May loosen up crap in your tank, and send it to the carbs. If you have water in the fuel. the seafoam won't clear it, so pull some fuel from the bottom of the tank (if built-in), and let it settle in a glass jar. Water will settle to the bottom.