Low Oil Sensor

[mrH20]

Good Afternoon,

I recently purchased a 2001 Speedster with the 240 Merc. engine. I was cleaning out the engine compartment and noticed the 2 wires leading to the oil resevoir on top of the engine, and 1 wire from the bottom of the water separator were disconnected. I called the previous owner and he told me the original owner disconnected them because of the oil light? kept coming on. He said he didn't think it was a big deal because he just made sure the oil tanks were always full.

Should I be concerned? Is it a big deal to repair the faulty sensor? Are they generally a stock item, price and where would I find one? I'd like to get it all ship shape for the ice finally leaves Lake Erie.

As always, thank you for your response.

Cheers,
Geo.

 

[kustomkarl]

The 2 wires from the oil sensor are Blue and Lt Blue wire. If you disconnect them the light goes on to indicate that the oil is low. I checked the manual and I don't see another wire going to the fuel separator. What color is it?

 

[mrH20]

oil sensor

Hi Karl,
The 3rd wire is tan and I believe it goes to the water sensor. My issue is more with the blue wires. Is the sensor for low oil in the cap on the resevoir? Is there a way to check to see if it is faulty? Should I just replace and reconnect the wires?

Thanks again for your suggestions.

Cheers,
Geo.

 

[seadoosnipe]

wires....

Looking at the drawing on the 240 hp M-2, the tan wire is your engine temp sensor wire and will greatly affect the engines ability to use it's electronic control system to make the adjustments to your systems "rich and lean" process, as the engine runs differently at cold temperatures and at warm temperatures.
Your Low Oil switch is showin that you have 3 wires, one is LTBLU and the other is LTBUL/WH.....they come from the same link, the other is a BLK wire, which appears to be grounded with several other wires in a lug type fashion.

All these sensors and wires have a purpose for being on the engine. Can it run without them, seems so. Is the engine running like it's suppose to? No, it's not. The communication these engines do now through the ECU/ECM or somewhat lenient but for the most part, will stop a function of some sort from operating correctly. This isn't a 1961 Chevy motor where you work on an engine and have a couple bolts left over.
If the wire has a place, hook it up..........
Let me know if you need more help. I've done a bit of work with these things, so with you as a premium memeber and able to follow along in the manual, just give me a shout, we'll "get r done"...........:cheers:

 

[mrH20]

Oil Sensor

Thank you kind Sir,
I'm planning on putting the boat in the garage (Looks like rain/snow) for the weekend to work on it. I picked up an adapter so I can run the garden hose while I'm running the boat.
I'll let you know how I make out.
Cheers,
Geo.

 

[mrH20]

Oil Sensor

Hey Seadoosnipe,

I got everything dialed in today. The boat actually had 4 things disconnected, the 3 wires and a small rubber line beside the water separator which when I fired the boat up, was spewing gas all over the battery.
Thankfully I was watching carefully and shut her down before I blew my garage up
Anyway, repaired the rubber hose (snipped a split piece off) and fired it up.
Ran like a top, oil light didn't come on, problem terminated.

Thanks for all help and support (Karl as well). Its nice to have a place to bound ideas and experiences.

Cheers,
Geo.