1998 J90PLEEB--What's the prognosis Doc?

Joined
Jun 19, 2010
Messages
12
Re: 1998 J90PLEEB--What's the prognosis Doc?

Hi Folks!

The motor has been stored on tilt for ~1 week. I took off the cover and got a look. Not much of a puddle this time. Stuck my finger in it and it seemed like pure oil (but I guess if it had been sitting a week, any gas would have evaporated leaving only oil behind) However, I took some time to look really, really close at everything.

I noticed that it appeared as if gaskets and seams on the fuel pump/vro assy were weeping or leaking. So, I cleaned everything up really well.

Tilted her up and down a couple of times and then noticed that the leaking or seeping was, yes indeed, from the gaskets of the fuel pump/vro assy. I tilted her all the way up as high as possible and fuel mix dumped out of the lower carbs and left about a 1/3 cup of mix in the lower motor cover.

Cleaned that all up. Then carefully checked all of the screws on the fuel pump/vro assy. They were pretty loose. I tweaked them all about 1/16 to 1/4 of a turn and tightened up everything. Oil/fuel weeped from the gaskets when I did this. Wiped everything down again.

Hooked up my 6 gallon portable tank. Left it outside the boat on the ground. I made sure the fuel line had zero air in it before attaching to the fuel filter/water separator.

Started up the motor. Huge difference! Evacuating all of the air from the fuel line made it start up easy. No stalling. A little rough idle, but nothing terrible.

No leaking or weeping from the fuel pump/vro. Everything stayed dry. Shut her down. Tilted her up and left her sit for a 1/2 hour.

Came back and everything still nice and dry. Except for two minor oil drip lines. So there appears to still be a little bit of a leak behind the fuel pump/vro closer to the motor where I cannot see.

But I got to tell you. It looks SOOO much better.

Do you think I can run her this way safely the rest of the season? Then I could tear into the fuel pump/vro and carbs over the winter months.
 
Joined
Jun 19, 2010
Messages
12
Re: 1998 J90PLEEB--What's the prognosis Doc?

Update: No Oil warning horn sounded!!!

Last weekend...running her back from the mooring ball to the ramp. The oil warning horn sounded. Not sure what happened, but luckily I've been running 100:1 mix in the fuel and using the VRO at the same time.

Any ideas how I should troubleshoot now?
 

Tex Aggie

Cadet
Joined
Aug 4, 2011
Messages
17
Re: 1998 J90PLEEB--What's the prognosis Doc?

what is the air valve stem for in the center of the motor between the carbs?
 

wilde1j

Vice Admiral
Joined
Apr 15, 2002
Messages
5,964
Re: 1998 J90PLEEB--What's the prognosis Doc?

Why are you opening a year old thread?
 

BonairII

Commander
Joined
Jun 7, 2011
Messages
2,727
Re: 1998 J90PLEEB--What's the prognosis Doc?

He probably didn't notice the date on the thread.

Believe it or not....there are many forums on the web that prefer that old threads are "re-opened" rather than starting duplicate threads.
 

Tex Aggie

Cadet
Joined
Aug 4, 2011
Messages
17
Re: 1998 J90PLEEB--What's the prognosis Doc?

no i didnt notice the date on the thread. I was researching some stuff for my motor, a 1999 johnson J90PLEEB via google and ran across this site
and this thread.

I am a newbie on boats and motors. This is my first.

Can anyone answer my question about the valve stem? I just took all the carburetors off my motor and are cleaning them. My motor isnt running either.

Just trying to learn all the details I can.

thanks!
 
Joined
Oct 4, 2011
Messages
1
Re: 1998 J90PLEEB--What's the prognosis Doc?

Hi, The valve stem is wher you can attach a can of fogging spray to fog all the carbs when winterizing the motor. It runs the fogging spray through all four carbs at once. The stem leads into the top of the automatic choke assembly. With the red tab down, the motor runs normally. With the tab up, it is a manual choke.
 
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