1989 90 horse two stroke

Dan McNally · Posted: Sat Mar 08, 2008 8:03 pm Post subject: 1989 90 horse two stroke

Alright c-brats, who can help here? I have a 1989 90 horse two stroke evenrude that has run perfectly since I bought it, it is on the old boat that I had before I became a dory owner. I did not have the heart to sell it when I bought the Shannon-Colleen two years ago but the wife says we need the space, sell the old boat so I will. I go out charge the battery and she fires right up, runs for a minute and the temperature alarm sounds off, I check the pee stream and it is great and the temp gauge shows I am not hot so what gives? I tried it a second time a little later same thing happens.
Any suggestions would be appreciated, I have a buyer coming next week to to inspect the boat and have limited time during the week to take it to a boat shop to be looked at.

Thanks for any help.

Dan McNally.

JT · Posted: Sat Mar 08, 2008 8:48 pm Post subject:

Is that engine oil injected? My 40 horse Johnson (87) has a series of different beeps to signal various warnings. Could it be a no oil alarm? I cleaned up my oil intake tube and that halted the alarm for that. Evenrude forum on I Boat may be a good place to check also. I found a list of alarm signal interpretation there. (Haven't printed it yet).

JT

Captains Cat · Posted: Sat Mar 08, 2008 10:01 pm Post subject:

Sounds like (beep!) the temp sensor to me!! And I'm all the way on the right coast! Shocked

Charlie

Dora~Jean · Posted: Sat Mar 08, 2008 10:26 pm Post subject:

Thermostat? The pee stream bypasses the thermostat.

Captains Cat · Posted: Sat Mar 08, 2008 10:29 pm Post subject:

Didn't mean the thermostat. The thermostat is a mechanical device that opens and closes with heat.

Meant the sensor that sets off the high temp alarm, wherever that is/whatever it is on an engine that old. Must be one if it has an alarm.

Charlie

Larry H · Posted: Sat Mar 08, 2008 10:56 pm Post subject:

Dan,

The temp sensor is located at the top of the cylinder heads, and has a brown?(I think) wire. It looks like a single brown wire coming out of the outer cover on the head. Slide the rubber boot back and disconnect the scissor connector. The rubber boot has small tabs on each end. If it is not a scissor connector, then its a pull apart bullet connector.

I would run the motor on the flusher, and disconnect the sensors one at a time to determine if one of the heads has no cooling flow. Disconnecting one or both sensors should silence the alarm. The overheat alarm is a continuous sound which starts when the sensor is overheated.

If the motor is a VRO oil injected motor, the oil alarm is a short beep, one beep when turning the key on tests the horn. A short beep every 40 seconds indicated low oil in the oil tank. A short beep every 1/2 second is a NO OIL alarm. If the no oil alarm repeats continuously, stop the motor and mix oil into the fuel tank to provide mixed gas/oil to the motor.

The thermostat is located at the rear, lower area of the exhaust cover area, between they cyl heads. There are two hoses going from the thermostat housing to the bottoms of the cylinder heads. To check for flow, remove the hoses one by one. Water should be coming out of the spigot on the heads.

Dora~Jean · Posted: Sun Mar 09, 2008 3:02 am Post subject:

Captains Cat wrote:

Dan McNally · Posted: Sun Mar 09, 2008 6:03 am Post subject:

It is not an oil sensor because the alarm is continuous, and the engine is non oil injected I mix the oil when I add the fuel. The fuel has been setting for a season and may have separated. I will take a look with a manual and see if I can find an answer tomorrow.
Thank you for the responses.

Dan.

Captains Cat · Posted: Sun Mar 09, 2008 10:37 am Post subject:

CW · Posted: Sun Mar 09, 2008 11:36 am Post subject:

fresh gas and plugs and totally cleaned battery connections is always a good way to start. C.W.

Dan McNally · Posted: Sun Mar 09, 2008 2:13 pm Post subject:

C-Brats,
I did a little checking this morning and found that the cup of the earmuff was bent slightly and the water flow was impeded, I adjusted that and all is right once again.

Thank you for the responses,

Dan.

Captains Cat · Posted: Sun Mar 09, 2008 4:31 pm Post subject:

Dan, how did that set an alarm of? Unless you have some kind of "flow" alarm....
Question

Charlie

Dan McNally · Posted: Sun Mar 09, 2008 8:29 pm Post subject:

Charlie,

Dan McNally · Posted: Sun Mar 09, 2008 8:36 pm Post subject:

Charlie,
It set the temp alarm off because there was not enough water volume to cool the engine properly. Apparently the volume that was escaping because of the improper fit was just enough to set off the alarm. I ran it several times today to see if it would happen again and it was just fine. So it was an easy fix, quite out of the normal for fixes for me usually my fixes cost lots of time or money or both.

Regards,

Dan.

CW · Posted: Mon Mar 10, 2008 10:54 pm Post subject:

Isn't it nice to have an easy "fix" now and then! I was fishing with a buddy a couple months ago. I was just bragging on how much I liked my 1992 Yamaha 9.9 electric start high thrust kicker motor. When I went to fire it up, it cranked and cranked, but would not run. I had just run it just fine warming it up at the dock about 2 hours before..... sure enough, just as I envisioned a nice hefty repair bill, I saw the clip for the dead man cutoff switch pulled out of its notch and lying on the swim deck/motor mount..... I clipped it in and WHollah! Ran like a house afire. C.W.