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25.05.2021 7:49:51
No Oil sensor in inside the OMS pump. here
See full version: Johnson 150 HP Oil Alarm Sounding
No Oil sensor in inside the OMS pump. here
The oil tank has a float which sets off the alarm if the oil gets too low. The OMS pump (4 wire pump) has a motion sensor to check for oil being circulated. Fuel restriction has a vacuum gauge in the fuel line and the overheat sensors are on the cylinder heads.
You might run some 50::1 premix fuel until you get it sorted out.
2 - A beep every 20 or 40 seconds = oil level has dropped to 1/4 tank. (Late model engine = Every 40 seconds)
1 - A steady constant beep = Overheating - The V/6 engines, possibly some others, have a fuel restriction warning which is also a steady constant beep.
Re: Johnson 150 HP Oil Alarm Sounding
These types of fuel tank gauge are a little more sophisticated. They use a Sonic Radar to detect the level of the oil below the gauge. It measures the time it takes for the sound wave it sends out to reflect from the oil. Like a submarine! more
We have level gauges with high & low-level alarms plus bund warning alarms. With so many high-quality level monitors available it’s hard to know which is right for you. So here’s a quick guide: more
Lastly, The Watchman Anywhere is a Smart Gauge that you can connect to your smartphone. Compatible with both iOS and Android phones you can track your oil storage tank from anywhere! There is a battery in the Gauge & a Yearly Subscription required for the app. more
The Watchman Alarm works very like the Sonic but has a built-in alarm to warn of unusual loss of oil via leaks or theft.
As the name suggests, these are tank gauges that are read by a visible mini tank with a glass viewing window. One end is connected to the top of the tank and the other to the bottom. Using this method the oil that appears in the Sight Gauge is at exactly the same level as that in the tank.
The sensor is a tube filled with pressurized air - there are no moving parts to foul, or electrical components inside the tank. It is unaffected by floating solids or stray current. more
Comes complete with a monitor panel, 30 ft of shielded 18/3 wire, (1) SYM-2Q air pump/sensor module, 10 ft of urethane tubing, (1) TPA-1250 1-1/4" tank penetration assembly, and 3 heat shrink wire connectors. more
Although designed for fuel or drinking water tanks, this panel can be used with any fluid, EXCEPT gasoline. more
The TS-2000B programmable monitor provides reliable and accurate tank fluid levels for applications where both high and low level alarms are required - such as diesel tanks, where fill-without-spill is desired. It features remote alarm capability for the helm station or cockpit.
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If it is a solid tone, that is an overheat alarm and you may have a bad cylinder head temperature sensor. I suspect a bad sensor, rather than an overheat problem because you mention it did it right after you put it in the water, and it should not be able to overheat that quick. Do make sure that you are getting a good flow of water out of the tell tail when running though, and flush the engine on the hose for good measure. You have one in each head, and if you unplug one at a time when it is acting up you should be able to identify which one is giving you the problem and replace it. Do not just leave it unplugged, that tends to be dangerous and can make the engine run very rich. [links]
What engine does the boat have, and what does the alarm sound like? We need a lot more information than you left us with.
If it is a series of three beeps it means the oil level is low in the engine mounted tank. If the tank is full either you have a bad connection, or a bad sensor. To check it unplug the two blue connectors going to it and check for continuity with a multimeter. When full you should have "NO" continuity, and when low continuity. here