Low oil alarm on 1998 mariner 150 mag III

[eddiec]

Re: Low oil alarm on 1998 mariner 150 mag III

i appreciate all the info and advice John, you've been a lot of help

eddiec

 

[eddiec]

Re: Low oil alarm on 1998 mariner 150 mag III

Thought I would post the outcome after all the help. Removed ALL oil injection components, engine tank, warning module and all wiring from it, motion sensor, and plugged crankcase outlet that pressurized oil tank. Obviously self test no longer beeps when ignition is turned on. The good news is the tachometer suddenly starts working perfectly. My only concern is, does the engine overheat alarm still work or did I do away with it by removing warning module.

 

[achris]

Re: Low oil alarm on 1998 mariner 150 mag III

Overheat alarm should still work. You can check it by grounding the sensor wire to the engine block.

 

[eddiec]

Re: Low oil alarm on 1998 mariner 150 mag III

Overheat alarm should still work. You can check it by grounding the sensor wire to the engine block.

Thanks

 

[eddiec]

Re: Low oil alarm on 1998 mariner 150 mag III

Ok, removed all oil injection components, changed plugs and premixed gas and went to lake. Motor ran great for a while but on my way in on plane motor went from 65-68 down to 40 mph. When i shut throttle down it was idling with a miss. I dont know if i fouled out a plug or 2 or have some other problem. Thats why I'm putting this question to greater minds than I have. Any ideas?

 

[Maxz695]

Re: Low oil alarm on 1998 mariner 150 mag III

Air mixture screw may need adjusting

 

[CharlieB]

Re: Low oil alarm on 1998 mariner 150 mag III

First things to check when a motor slows while under load is a compression check and spark test on all cyls.

Something went wrong and you need to troubleshoot correctly to determine what it is and most importantly, what caused it.

Low compression can indicate a damaged cyl/piston, often caused by a fueling problem.

No spark will show an ignition problem.

Test then repost your findings.