1995 Johnson 150 ocean runner - carb. bowl cross reference and fuel questions

[rcheshire]

I recently purchased a 1995 Johnson 150 ocean runner (j150sleom) from NC state surplus. I have mounted it on a 1986 Grady White tournament 19 and run it twice for about 15 minutes in the water with the
following issues:

1. The warning horn sounds at low idle after shutting off and restarting and just after initial start ....priming the bulb cures the problem. It seems to run fine when throttled up. I primed the bulb before starting each time.

I installed a racor water/fuel seperator before using the inboard tank. I drained the tank and filled with fresh pre-mixed fuel before running the engine. It collected a few ounces of water already and some small white flecks. I put a primer bulb inline before the filter thinking it would make it easier to prime the filter when I change filters and it seems to do a better job of priming than the bulb between the outlet from the filter and the engine.

2. The carb. bowls leak at the small bb near the bottom. One of these was actually missing and I have epoxied it for now. The bowl I removed was visibly warped where it attaches to the carb. also. I saw a suggestion to replace the minlon bowls with metal ones for a different engine. Are there metal bowls out there for this engine? Does anyone know a part number or model number of the engine they might come from?

3. The low oil horn does not sound even though I have plugged the oil inlet line and not disconnected the wiring to the pump. Actually I did disconnect and could not start the engine, so I reconnected. Should I disconnect the 4-prong plug to the VRO? (I did not get the oil tank with the engine so there is no VRO decision to debate for now.)

Thanks in advance for any suggestions.
Rob

 

[ezeke]

Re: 1995 Johnson 150 ocean runner - carb. bowl cross reference and fuel questions

When the ignition is first turned to the run position, the horn should sound a single short beep; that is the test circuit activating to let you know that the horn is functional.

V6 engines have a vacuum switch located near the fuel pump that lets you know when there is a fuel obstruction on the gasoline side by sounding a constant horn. This could be caused by too many filters, too small a hose, a failing anti-siphon valve, blocked tank vent, or clogged pickup.

Besides being a fire and explosion risk, the leaking bowls will allow air infiltration which may increase the danger of a lean condition. I would replace the bowls. Any parts that you need will be available from BRP/Evinrude dealers or on line from their store. Be sure to get the repair kits at the same time so that you can replace the gaskets and floats:

Click on the parts diagram at the upper right, then navigate to your model and carburetor: http://shop.evinrude.com/

 

[rcheshire]

Re: 1995 Johnson 150 ocean runner - carb. bowl cross reference and fuel questions

Thanks Ezeke,
I don't get a beep when the ignition is turned on but this may be because the control box is older than the engine, not sure what year. However, I know the horn itself works from grounding the tan wires to the temp. sensors on the head. There is no kill switch on the control box either. I plan on upgrading it later but a friend had this one sitting in his shed and didn't need it any more.

Does the vacuum switch activate the alarm if there is a fuel obstruction?

As far as I know there is no anti-siphon valve. The fuel line runs from the water/fuel seperator to a 90 degree elbow that leads out to the motor well. the line from the elbow the engine is ratchet clamped with a primer bulb inline. Could air leaks at the carb bowls be letting the fuel siphon back to the tank if it sits for any length of time. Should I install an anti-siphon valve even if I plan to replace the bowls?

I'm hoping to that someone knows of a metal bowl that fits these carbs. The plastic ones seem to be poorly engineered if they leak and warp. However, if the plastic ones will last many years without malfuntioning, they might outlast the engine.
Thanks again,
Rob

 

[ezeke]

Re: 1995 Johnson 150 ocean runner - carb. bowl cross reference and fuel questions

"Does the vacuum switch activate the alarm if there is a fuel obstruction?"

Yes, constant horn alarm.

Most built in tanks come with the anti-siphon valve installed per Coast Guard regs. It is to keep a hose or fitting leak from siphoning all the fuel from your tank. They usually consist of a spring and ball bearing inside the metal fitting that the fuel line connects to at the top of your tank.

The valves are not required if all of your fuel lines and connections are above the tank (and the engine of course) and can be removed.

Air leaks in the fuel system can permit fuel to flow back to the tank; the regulation anti-siphon-valve is not positioned to stop that from happening.

I think some of the problems with the carburetor bowls have been caused by people soaking them in carb cleaner despite the specific instructions not to do that in the service manuals.

 

[gregr1971]

Re: 1995 Johnson 150 ocean runner - carb. bowl cross reference and fuel questions

i found sone small stainless set screw in place of the bb's, threaded them in and now no leaks at all.

 

[gregr1971]

Re: 1995 Johnson 150 ocean runner - carb. bowl cross reference and fuel questions

i also have a complete '95 150 ocean runner 20",that has a bad cylinder from the same problem with the bb's coming out.
if you need some parts, let me know.

 

[bwilliams8821]

Re: 1995 Johnson 150 ocean runner - carb. bowl cross reference and fuel questions

Does anyone know what causes the float bowls to warp besides soaking them in carb cleaner? I put new bowls on my carbs less than a year ago and they are already warped and creating leaks.

 

[jonesg]

Re: 1995 Johnson 150 ocean runner - carb. bowl cross reference and fuel questions

Overtightening the screws will pull the bowl outta shape.
You could try letting them relax or dressing them on a sanding table carefully. Not owning or reading the factory service manual causes a lot of these avoidable problems.
The 150 is a good engine, well worth spending $40 for the proper manual.

www.outboardbooks.com

 

[ezeke]

Re: 1995 Johnson 150 ocean runner - carb. bowl cross reference and fuel questions

Edit: Aluminum replacement bowls are available for some models from your BRP/Evinrude dealer.

Most of the plastic bowls were damaged by soaking in carburetor cleaner or by heat soaking; that is why your factory service manual specifically says not to soak the carburetors on these models.

 

[bwilliams8821]

Re: 1995 Johnson 150 ocean runner - carb. bowl cross reference and fuel questions

I do have the manual and just finished rebuilding the carbs. Just trying to get an idea of what the cause of the warping was. The last time they were rebuilt was by a mechanic, maybe they overtightened the screws. Thanks for the help.

 

[jonesg]

Re: 1995 Johnson 150 ocean runner - carb. bowl cross reference and fuel questions

or someone flooded the bowls with carb cleaner.