'95 Mariner 200 warning buzzer

[bamadave]

My '95 Mariner warning buzzer started beeping today while out on the water. Here's what I can tell you. The fuel filter was replaced yesterday. The water warning light is not on but I disconnected it anyway. Still beeped when I started the engine. I check oil reservoir, it was full, disconnected oil level sensor, still beeps. I disconnected temp sensor, still beeps. I was told that if it were high temp warning, it would be a steady tone instead of a beep beep beep tone. I called the dealer and was told it sounds like the oil pump and or sensor. He said the oil pump has a magnetic sensor telling the computer that the oil pump is working. The oil pump is driven by a plastic shaft and he said that might have stripped. He suggestion was to disconnect the oil pump, install a block off plate, remove all oil pump parts, and to start mixing the gas and oil manually. I really don't want to do that, ANY SUGGESTIONS? Thanks

 

[papasmurf]

Re: '95 Mariner 200 warning buzzer

The oil pump is driven by a plastic gear on the crankshaft, and they have been known to strip usually by the oil pump seizing up. The magnetic sensor senses the rotation of the oil pump shaft, which drives the oil pump. If the oil warning module senses the shaft is not turning it will sound the alarm or buzzer. If the gear is bad, it would be cheaper in the long run to remove the oil system and premix. Does it sound with the engine not running, with the key in the on position?

 

[hondon]

Re: '95 Mariner 200 warning buzzer

Your warning module may also have gone to hell.While you are sorting all this out,I would suggest that you DO run fuel mix in case we DO have a oil failure.

 

[rodbolt]

Re: '95 Mariner 200 warning buzzer

I would suggest running on premix and testing the system per the service manual. a bad stator or switchbox can trigger the alarm as can a bad module or bad drive gear.

 

[bamadave]

Re: '95 Mariner 200 warning buzzer

The buzzer sounds 2 or 3 seconds when I turn the switch to the on position. I assume a test for the buzzer. When I start the engine, The buzzer instantly starts beep, beep, beeping. I don't mind premixing, Knowing The engine is protected if oil pump fails. I know what end of a wrench to hold, so whats involved in removing the oil pump and accessories with it? Meantime, can I start premixing now, pull the parts later? If so, how do i disconnect sensor so buzzer will shutup? Any test to determine if pump is DEAD? Thanks for your replys, This is a great forum!

 

[BaysideMarine]

Re: '95 Mariner 200 warning buzzer

Does your engine have a small oil reservoir on the engine and a main reservoir off engine? If so, these onboard oil reservoirs were prone to low oil alarms. A good check is to take the cap off the reservoir (with the engine running) and see if the bottle overflows. If so, the pump mechanism is working correctly. Turn the cap upside down and see if the beeping stops. If it does, replace the cap/sensor assembly.<br /><br />Next check is to remove the oil line from the engine (make sure you are running on premix) and observe the output. No drops - problem. Drop per second or so or thereabouts - all ok.<br /><br />If everything checks out ok then the next test is to give the oil warning module a tap or two or three with a hammer (gently) or other solid object. If you get erratic tones from tapping the module then the module is at fault (ouch, expensive!).<br /><br />Cheers,<br /><br />Nicholas

 

[bamadave]

Re: '95 Mariner 200 warning buzzer

Yes, the engine does have the reservoir on top. I have checked the switch(with VOMeter) and it's good. I also disconnected oil reservoir sensor and still beeped. Is the oil warning module on top of motor?

 

[bamadave]

Re: '95 Mariner 200 warning buzzer

Yes, the engine does have the reservoir on top. I have checked the switch(with VOMeter) and it's good. I also disconnected oil reservoir sensor and still beeped. Is the oil warning module on top of motor?

 

[rodbolt]

Re: '95 Mariner 200 warning buzzer

hello<br /> I dont like the downunder test much. if you refuse to test the system as per the service manual at least remove the pump from the block,remove the drive shaft and use a flashlight to inspect the gear. but like i said the first time. all the test,troubleshoot and repair steps are clearly laid out in a flow chart in the service manual.

 

[bamadave]

Re: '95 Mariner 200 warning buzzer

OK, I took the oil pump off and there was alot of remnants of the plastis gear on the oil pump drive shaft. SO, what all is involved in disconnecting the oil injection system. I left the oil pump drive shaft and the plastic coupler from the shaft to pump out and reinstalled the pump just to seal the hole. I know I will have to get a block off kit, but in the mean time, how do I make the buzzer shut-up? I'm guessing a jumper between the white and blue/white wires coming from the oil pump sensor but am wise enough not to anything til advised to do so. Also, just checking, is it 50:1 ratio like most?<br />I have already premixed the gas but have not started engine til I know. Thanks again for everybodies help!

 

[papasmurf]

Re: '95 Mariner 200 warning buzzer

Did you remove the motion sensor located directly above the oil pump? It should be held in by a single screw.

 

[bamadave]

Re: '95 Mariner 200 warning buzzer

I haven't removed the motion sensor yet. Will just removing the sensor shut the buzzer up? The sensor detects motion, SO, if removed, no motion, so how does that help? Not being argumenative, I appreciate the help. What all will be blocked off (oil line from oil pump to fuel pump, oil tank to oil reservoir?)

 

[papasmurf]

Re: '95 Mariner 200 warning buzzer

The sensor is for detecting NO MOTION.

 

[bamadave]

Re: '95 Mariner 200 warning buzzer

Am I missing something, if I remove the sensor, want it be the same thing as no motion detected?<br />also, is the fuel/oil ratio 50:1? thanks for being patience with me while I struggle thru this.

 

[bamadave]

Re: '95 Mariner 200 warning buzzer

help please!

 

[CU2NITE]

Re: '95 Mariner 200 warning buzzer

If you remove the oil sensor above the oil pump thats ok if you are going to pre-mix. Your sensor for the heat alarm is separate. Also you need to take off all the oil lines, and make sure you buy the plastic plug that replaces the oil pump shaft. This plug holds the old gear in place so it doesn't turn. If it turns it could come loose and cause big trouble. When you remove the oil line from the bottom of the motor comeing from the oil resevour you'll need to buy the screw plug that fills that hole. The two plugs cost about 20 bucks at the local marine. Run pre-mix at 50-1 always. Good luck and let us know.<br />CU<br /><br />--------------------<br />RUNNING THE MOTOR WHILE LISTENING TO THE HORN WILL MAKE YOU MORN!!

 

[Robot19]

Re: '95 Mariner 200 warning buzzer

Bass & Walleye Boats had an article on electronic oil injection in their Oct 04 issue that provides a reliable solution to your problem. The unit is available at www.go2marine.com. Search for Electronic Oil Injection.

 

[CU2NITE]

Re: '95 Mariner 200 warning buzzer

What did you decide to do Bamadave?

 

[bamadave]

Re: '95 Mariner 200 warning buzzer

i want to thank everyone who posted. After trying all the advice, the buzzer still buzzed after disconnecting everything. On a hunch, I called Mercury tech support, yes they have one <br />920-929-5040, and they faxed a complete instructions for complete removal of the oil injection system. The oil module has to be disconnected, purple and tan/blue wires going to the terminal block. This allows the overheat alarm to still work BUT the water sensor in the fuel filter WILL NOT buzz if water is in the filter but the red light will still work. Also nothing here was said about blocking off the crankcase pressure valve which is recommended by Mercury. Mercury claims that the biggest cause of the crank gear failure is the plastic piece between the drive gear and oil pump swells and locks the drive gear against the crank gear and POW, the nylon gear tears up. They said is is from the engine sitting up for a while. My boat stays in the boat house and is run at least every 2 weeks so I don't know. I know I don't have 2000 to 4000 to replace a 10.00 gear. I don't like oil injection, never have liked oil injection, and never will like fuel injection. If it's working properly, it's great. IT'S WHEN IT DOESN'T WORK IT SUX! I'm of old school thinking that if it can fail, it will and then get your wallet out. Another case of planned obsolescense! But any case, everythings cool now that I'm premixing and more importantly, I can fish again. Again thanks for everybodies input. This is a great forum for us who can't afford 75 to 100 a hour. My dad taught me which end of the wrench to hold and how to use my head when it comes to a mechanical problem. Nothing is more satisfying than repairing something yourself and using the grey matter between your ears instead of just giving your wallet to the shop and HOPING they got it right. As long as I own boat's, I will be here to get advice. THANKS and have a BLESSED DAY!

 

[CU2NITE]

Re: '95 Mariner 200 warning buzzer

The crankcase pressure valve is the "screw plug" I was talking about. It is one of the two lines that are attached coming from the oil tank, going to the base of the motor block. I am glad you figured it all out. I totally agree with the better safe than sorry attitude! Good luck.<br />CU<br /><br />----------------------<br />RUNNING THE MOTOR WHILE LISTENING TO THE HORN WILL MAKE YOU MORN!!