Oil Alarm

[Phunahm]

I have a 86 150XR2 and the alarm works only 90% of the time when I turn the key on, the wire going to horn was checked and is ok,I cleaned all grounds related to the module and the sensors.....If I tap the ignition and turn the engine over w/o starting it sometimes does the self test....other than that it just silent.....does it sound like a module replace in store?....also if I get it to work it sometimes goes into a beep beep beep mode or a continuous beep......if I remove any of the sensors while its beeping it will shut off.......

 

[j_martin]

Re: Oil Alarm

Before you replace the module, I'd put a meter, or a light on the purple wire feeding power to the module. Then watch what happens when you turn on the key, and then crank. It should come on when you turn the ignition key on, and stay on as you crank. I would bet your ignition switch is on the fritz.

If not, it's probably module time.

hope it helps
John

 

[Phunahm]

Re: Oil Alarm

well I still have a No key on self test however I did find that the hoses from the reservoir to pump and pump to mixer was very brittle and leaking I wonder if that would set off an alarm??...But Im not getting any self test at all now......Also why does a wire go to the Coil from the oil injection module For a shut down?....I just went out to the boat and was checking the hot lead to the module like above said and it stays on...however now the alarm stays on even with all sensors unplugged good guess the it is the module now huh?

 

[j_martin]

Re: Oil Alarm

Let me help you with a little theory.

The oil pump has a rotation sensor in it. It pulses when it's turning.
The ignition sends pulses to the coils when the engine is running. The wire you asked about is wired to one of those coil signals.

The module compares the 2 pulse trains. If both are either missing, or there, all is good. If one is there, and the other isn't, the alarm is supposed to sound.

In addition, there is a low level switch in the engine oil tank. It is supposed to close the circuit if the oil level goe down even a little. The purpose is to tell you you forgot to add oil to the boat tank, and you have 1/2 hour at WOT to get back to the dock.

You can disconnect the tank switch if it's setting off the alarm. That's considered a test for a faulty switch.

It takes more elaborate diagnostics to check out the pump rotation sensor, but it's in the maintenance manual.

When power is turned on, if the tank switch is open (normal) and the rotation sensor is connected, and the module is good, it should beep 4 times.

If I had to guess, I'd say your module is bad. I would, however, do all the tests in the checkout procedure before I let go of enough money to buy one.

hope it helps
John

 

[Phunahm]

Re: Oil Alarm

Agreed,, I did all the tests I could find my cap sensor is one year old...however I still did the test on the cap sensor.....and the over heat sensor thats not directly related to the module,I also just did a freqeuncy test on the rotary oil sensor 8hz at 1000rpm that was with in specs, also each test to 4000 rpm turned out within specs.....So at this point IMHO looks like either a new module for 160 bux or eliminate the OI and go with the block off assy for 20.00 and mix the oil/gas......big decision to make....BTW I cant get any action out of the module at this point....

 

[Phunahm]

Re: Oil Alarm

Just for curiosity I removed the oil pump to check the gear make sure theres isn't any issues in there I have a bore scope and looked at the drive gear on the crank while hand turning the engine it looks like new no signs of wear at all.... So that pretty much made me decide to just spend the money on the new module instead of trying to mix 18 gallons of gas at every fill up....