2000 Johnson 90Hp primer ball

[ibuyre111]

Out of the blue my enging has trouble starting and when I got it started it ran poorly. I noticed the last couple of times that I use the boat , the primer ball was still hard when priming. It usually needs a few pumps to prime the engine. Any suggestions on what it might be?
Thanks

 

[Joe Reeves]

Re: 2000 Johnson 90Hp primer ball

Three things come to mind. Either the primer bulb has a stuck outlet valve (unlikely), a restrictrion exists between the bulb and the fuel pump (possible kinking), or the fuel pump is not drawing fuel fuel from it as it should.

To check the bulb valve, simply disconnect the hose from the engine side of the bulb and pump it. If fuel shoots out as it should, then obviously the fuel primer bulb is okay.

 

[ibuyre111]

Re: 2000 Johnson 90Hp primer ball

Thanks for the reply . I did the disconnect thing with the fuel hose and everything looked fine.
It seems to be something electrical now. motor starts up and runs fine , then it conks out. Restarts a few times, continue wake speed, then it conks out again, then it needs to sit before it will start again. Wait a couple of minutes, restart, Runs fine at wake speed then conks out, restart then try going and it will take off then conk out. Any Ideas?

 

[kenmyfam]

Re: 2000 Johnson 90Hp primer ball

Check the output side of the fuel pump. See if it is pumping well. If they are failing they usually start with a couple of healthy squirts then the volume diminishes from there.

 

[Joe Reeves]

Re: 2000 Johnson 90Hp primer ball

Look closely at the stator under the flywheel which is the beginning of both the ignition and charging system. If there is a substance leaking, dripping down on the powerhead area, replace the stator. A stator in that condition would result in a voltage drop to the powerpack which in turn would result in weak, erratic , and eventually no ignition.

Disconnect the black/yellow wire (kill circuit) from the powerpack.... the black/yellow wire that leads from the engine wiring harness to the pack. If this cures the problem, replace the ignition switch.

If unsure as to which black/yellow wire at the engine, go to the ignition switch and disconnect the black/yellow wire from the switch. Note that it will be impossible to shut the engine down via the ignition switch with that wire disconnected.