1994 Johnson 150 Acceleration Problem

[rdgallo]

I have a 1994 Johnson 150 Faststrike engine on my Ranger Bass Boat. The engine runs great most of the time. After I have used it off and on for a day or two, it will bog down or stall after I start it and try to "come out of the hole". It never does this if the engine is cold. I then have to slowly accelerate or push in on the key to give it a shot of gas to keep it from dieing on me. It only does this after it has been run a couple of days. The fuel bulb is not soft. Can anyone tell me what might be causing this? It has done it since new in 94. I took it back to the dealer back then and I believe he put larger jets in the carbs, but am not sure.

Thanks

 

[HighTrim]

Re: 1994 Johnson 150 Acceleration Problem

If hitting the primer aids it from bogging, shes starving for fuel, which would normally lead me to think jets/carb or fuel pump etc... But temperature sensitive?? Im not sure...I think I would of questioned the dealer when I got it new. Could a problematic fuel pump or diaphragm cause this, Im not sure. Hopefully someone will jump in

 

[rdgallo]

Re: 1994 Johnson 150 Acceleration Problem

Thanks, Hightrim. I should have pursued it further when under warranty. Anybody else have any ideas?

Thanks!

 

[tashasdaddy]

Re: 1994 Johnson 150 Acceleration Problem

i would have pursued it under warranty 13 years ago, i doubt you will get any warranty help now. it was an OMC warranty, not BRP.

 

[rdgallo]

Re: 1994 Johnson 150 Acceleration Problem

I am not wanting any warranty. I am just curious what might be the problem.

Thanks!

 

[CharlieB]

Re: 1994 Johnson 150 Acceleration Problem

By chance, is your on-board battery charger a 3 - bank?

Take along a volt meter and check the main engine battery once in a while, a weak, or dead, charging system and your battery voltage may be fallilng off in a couple of days, plugged in at home it comes right back up and everything seems normal til you run without charging a couple days.

Just an idea, something to check out.

 

[rdgallo]

Re: 1994 Johnson 150 Acceleration Problem

Charlie, I don't have an onboard charger - just use portable chargers. I appreciate your input. I am open to all suggestions.

Thanks!

 

[rdgallo]

Re: 1994 Johnson 150 Acceleration Problem

Charlie, could you please explain how a weak battery would cause my engine to do what it is doing. I don't understand the system well enough.

Thanks!

 

[rdgallo]

Re: 1994 Johnson 150 Acceleration Problem

Anybody else have any ideas at all?

 

[klotzy]

Re: 1994 Johnson 150 Acceleration Problem

What is your top rpm when running wide open (wot)?

 

[rdgallo]

Re: 1994 Johnson 150 Acceleration Problem

Around 5200 but I have never actually let it get all the way to WOT as the lake I was trying to do it on it too short. Anyway, I believe I could get 5500 out of it with a little more room and some tweaking of the trim. What are your thoughts on the acceleration problem relating it to WOT?

Thanks,
Ron

 

[fishingjackson]

Re: 1994 Johnson 150 Acceleration Problem

I have a 1999 johnson 175 that does the same thing push in on the choke an push on the throttle the motor will run great until you cut it off

 

[rdgallo]

Re: 1994 Johnson 150 Acceleration Problem

I think I might have found my problem the fuel line at the top of the water separater/fuel filter was not clamped. I believe I was sucking some air at times. The clamp was there, but had never been tightened.

 

[jonesg]

Re: 1994 Johnson 150 Acceleration Problem

You mean that clamp was loose since 1994?
I'd replace the fuel lines.
Check the cone filter between the carbs for junk.