Help with ER 150 Oceanpro

[O Dan G]

Looking for OB Motor help-
Seaswirl w the Evinrude 150 Oceanpro
Check Engine Light is on (fuel issue)
Ran tough at idle
Blowing white smoke
Always get the same gas and use same fuel stabilizer.
Replaced fuel/water separator filter.
Removed and cleaned fuel filter.
Pulled plugs they all looked good (champions) and I re-gapped them back to .30” (they ranged from .32” to .40”).
Sprayed carb cleaner in the 6 carbs.
both fuel and oil primer bulbs stay hard after start up.
***Check ENG light is on before motor cranks, no alarm with it.

Does anyone have any suggestions where to go next?

 

[boobie]

Got a model # ??

 

[Chris1956]

I am assuming this is for a mid-late 90s motor.

Check Engine alarm is usually a fuel restriction. However, since it is on before start up, suspect vacuum sensor near OMS pump.

Check the fuel tank vent, antisiphon valve, the main strainer under the airbox and any other filters you have.

White smoke is usually steam. Is motor overheating?

 

[O Dan G]

Model is E150EXEDB.
there is a vacuum line in bottom of air box and at top, but I don’t see a sensor there.
no sign of overheating. I will try look for antisiphon valve and fuel vent.
here is a pic of front of engine, unsure what I’m looking for the vacuum sensor.

 

[O Dan G]

Also is antisiphon valve before or after fuel/water separator?

disregard I see it is above fuel tank-

 

[oldboat1]

Typical signs of overheating. Tops of cylinder heads too hot to touch (should be no hotter than 140sF). White smoke from steam from water intrusion (blown head gasket or gaskets). Step one would be to replace impeller.

 

[Chris1956]

That motor has two vacuum lines to the airbox. They are part of the fuel recirculation system. Fuel line vacuum sensor is next to OMS pump. Look for electrical and vacuum lines to it.

You might get yourself a service manual. marineengine web site has them.

 

[O Dan G]

Typical signs of overheating. Tops of cylinder heads too hot to touch (should be no hotter than 140sF). White smoke from steam from water intrusion (blown head gasket or gaskets). Step one would be to replace impeller.

It smokes as soon as it starts, not after running and warms. Doesn’t overheat, no heat alarm/light. Water comes out of tailtell fine. Not saying that’s not it, but it seems unrelated to the fuel issue which trigger check engine light.

 

[O Dan G]

That motor has two vacuum lines to the airbox. They are part of the fuel recirculation system. Fuel line vacuum sensor is next to OMS pump. Look for electrical and vacuum lines to it.

You might get yourself a service manual. marineengine web site has them.

So I found parts breakdown and by that part #26 is vacuum switch. However no vacuum line goes to it on my motor that I see.
either way I disconnected it and still have the light.

 

[O Dan G]

My motor- view of switch

 

[Chris1956]

The vacuum sensor is connected to the fuel bracket. That is how it can detect a vacuum condition in your fuel line. However, since you disconnected it, and still have the alarm, something else is wrong.

Normally those sensors are activated by grounding. So check the wire back to the alarm for ground.

The vacuum sender wire is tan/orange, right? The wire between the sender and the alarm could be grounded, thereby tripping the alarm. If not, maybe the alarm is faulty.

 

[O Dan G]

Update, boat is with a mechanic. He believes it’s vro pump.