Re: 91 Johnson 175 EXEIS alarm
Recently purchased 1991 Johnson 175 EXIES 60V on 20 ' Hydrasport D/C. Ran well on sea trial but seemed underpowered. After the deal and a 175 mile trip back to New Orleans, 1st trip out ran into alarm tone after 15 minutes of running at near top speed. Telltale is streaming water vigorously and water pump was represented to have been recently replaced. Seemed to be a high temp alarm. Replaced thermostats yesterday and still getting alarm after 5-6 minutes under earmuffs. Alarm is not a steady tone but beeps for 1 sec every 2 seconds.
Also notice a fair amount of water leaking at the lower units where it attaches to the midsection. Called a wellknown shop who said this should not be a problem. Anyone had an experience similar. Any suggestions other than go see the mechanic???
Does this engine have the VRO/ OMS automatic oiling fuel pump system? (in other words do you premix or is there an oil tank).
The 2 second interval beep is "no oil" alarm which means that a sensor at the fuel pump has determined that the oil flow rate is not sufficient for the fuel rate. It generally means you're completely out of oil or there is something preventing the oil from flowing from the tank to the fuel pump. This is an emergency type tone because without oil your engine will get messed up quickly. Solution could be as simple as a crimped line or leaky clamps. Could be solved by checking out all your oil lines, clamps (use the ratchet kind) and purging the oil line. This is all very simple, DIY stuff.
The other intermittent alarm - one beep every few (10-15?) seconds is "low oil" which is a sensor in the oil tank that goes off when the oil is about 1/4 tank. It is not an emergency, but needs attention.
Two steady alarms are over heat and fuel restriction. They are identical and differ by what causes them and what causes them to stop.
The fuel restriction is a sensor at the fuel pump that determines that the fuel isn't flowing adequately. It will generally sound at fairly high RPMs, but turn off pretty much immediately if you back down the RPMs.
The overheat alarm will sound at any RPM from idle to WOT whenever the engine is too hot. Unlike the fuel restriction, if it happens at high RPM, it won't quit as soon as you back down, but only quits when the engine cools off.
In other words, if you're chasing a overheat or water pump issue, you're probably chasing the wrong thing. You'll need to check your oiling system. Let us know all about the oil system and fuel pump.
