NEW wrinkle for '93 Evindrude 115

[Party hut Chris]

This is going to be a long post because I'm trying to supply information. Fed and Flyingscott have been so helpful already, but just looking for answers here.

Facts (before new problem):
-Oil alarm has been sounding after boat runs for between 5-10 minutes
-I am running pre-mix in the tank, so hopefully no worries of destroying anything.
-Oil line purged and reconnected today (alarm still goes off)

Since I am not worried about the engine getting oil, here is the new problem:

Engine shuts down (sounds like starved for fuel) after running for a bit, but fires back up after I pump the primer bulb again.
It sounds to me like it is only running what fuel is in the system, and then is starving.

Related facts:
-New fuel line and bulb 9 months ago
-New primer solenoid at the same time

Question: Could both of these (oil alarm and fuel issue) be related to the fuel pump? I notice that these lines all feed into the same component.

Question #2: Should I just drill a few holes in the pontoons, sink the thing, and try to collect insurance? (Just kidding!!!)

 

[racerone]

Some folks would run out and install a new VRO pump.------------I would take the VRO pump apart ( easy to do ) and inspect this simple pump.-----------What does a compression test show on this motor ?-------------There could be crankcase compression issues and that is what drives the VRO pump.

 

[flyingscott]

Agree with everything above but I would check the pulse line to the pump and make sure it's in good condition

 

[rothfm]

When Its dying, squeeze your hose bulb, see if it makes a difference (verifying the fuel delivery possibility).

You didnt specify here if this is the VRO style pump even though you are pre-mixing. If it is, its harness should be disconneted or cut, and the oil side plugged/capped-and you wont get a specific horn for oil.

You have a couple options if squeezing the bulb helps. 1) rebuild the fuel side of the Vro. 2) omit the VRO and install a conventional pump as described here on the forums.

I had a '93 115 also...experiencing the same type issue. Narrowed down to my VRO style pump(oil side plugged and cable cut). Put in a spare-changed the symptom totally, put in another and had a high speed issue...finally put in a 3rd, and its been great ever since. If I have further problems I will be putting in the conventional old school pump.

 

[Party hut Chris]

Rothm- YES!! Squeezing the fuel bulb...engine runs beautifully once it begins to bog down.
And yes- VRO pump. Please elaborate!
Also, just to clarify-- FUEL bulb is what I am squeezing to keep her running-

 

[Party hut Chris]

Would this have anything to do with the fuel delivery?

 

[flyingscott]

Yes but you still need to verify that you have crankcase pressure and the pulse line is good.

 

[boobie]

Agree with the above and if that's okay repair or replace the VRO.

 

[rothfm]

Was just rereading this.... Whats a good way to check or test the pulses on that pulse line, other than visual/mechanical inspection?

 

[rothfm]

This post isnt new, but the OP hasnt updated with anything new, and the Pulse line topic came up....

I was real curious about Pulse line tessting, and what is a good way to monitor/test this?

 

[boobie]

Install a vacuum gauge on the line and see what you get.

 

[rothfm]

Should I expect a rapid "bounce" on that gauge, depending on RPM?

 

[interalian]

Or put a check valve in line between the pulse port and the gauge.

 

[boobie]

Did you ever try the vacuum gauge on the line ??