Evinrude 70hp 1989 High temp alarm

Greg Holmes · Jan 5, 2003

Hi to everone. I am a bit new to this so bear with me. I have just purchased a 14'6" boat with an Evinrude 70hp on it. Model AE70TLCOC s/no: A0310488. I have no info. on it and know very little about it so an operator/service manual would be very helpful. I am told it is a 1989 model. Perhaps someone can verify that for me? Also what is VRO injecion? I have some service history but not much. It seems to start and run well but has 2 problems. 1. When engaging gear it stalls if you are not quick enough on the throttle after disengaging the cold start. 2. A high temperature alarm sounds after running in excess of 4000rpm for 5+ minutes. If you go back to 1500rpm for a few minutes it stops. If you keep under 4000rpm the alarm does not sound. Any other maintenance / troubleshoting info. will be gratefully accepted.

snapperbait · Jan 5, 2003

Re: Evinrude 70hp 1989 High temp alarm

Hi GregNZ: Your engine is a 1985 according to the model # AE70TLCOC... For a service manual go down to the bottom of this page and click on repair manuals and you may purchase one from the list... VRO stands for Variable Ratio Oiling... It's function is to mix oil and fuel at a precise ratio according to the speed and load on the engine... It is said by some (myself included) that VRO will cause major engine damage if for some reason the VRO pump should fail... Therefore many people opt to disconnect the feature and mix thier own fuel and oil at a 50:1 ratio... Problem #1 Stalling when engaging gear could be caused by the idle being set too low... Your engine should run at 700-750 RPM at idle in Forward gear... Problem #2 High Temp alarm.... If water is comming from the tell tale "pee hole" you may have a thermostat that is not opening properly "sticking closed"... You may also be due for water pump impeller service.... The impeller should be replaced every other year reguardless of how much the engine is used...

Greg Holmes · Jan 5, 2003

Re: Evinrude 70hp 1989 High temp alarm

Hi snapperbait, Thanks for reply. I guessed the stalling may be idle speed related so I will trying setting to 750rpm in gear. On the cooling, water is coming out of the pee hole but is there any indication as to how much it should be or is it OK as long as there is flow? I may opt to disconnect the VRO as the last service report indicated a possible problem in this area. Is it a big job to disconnect or not?

OBJ · Jan 5, 2003

Re: Evinrude 70hp 1989 High temp alarm

Hi Greg... Take a look at the VRO pump. Is there a wireing harness coming from it? If there is not, I would suggest replaceing the pump as the the pump would be original equipment, no alarms no nothin'. If the harness has three wires in it, then the pump was updated to a newer pump. If the harness has four wires, then the pump is a newer newer version. The wires give you the alarms for the VRO system. Do you have any alarms other than "Low Oil Tank" alarm? If the last service report indicated problems in this area, don't wait to get it fixed or you may end up with an over haul on your hands. On service manuals, ask your dealer to get you one for your engine. The Generics are OK for some purposes but you can't beat an OEM manual specifically for your engine. It would also tell you how to run the motor without the oil injection. As to the overheat problem, snapperbait is probably right. You need a new water pump impeller or T-stat or both. Change out the impeller first and see what she does. Jim

ob · Jan 5, 2003

Re: Evinrude 70hp 1989 High temp alarm

Greg, As snapperbait touched on I would highly advise not to second guess cooling system .I would recommend that you change out to a new thermostat assy and if you don't have record of recent waterpump replacement I would replace it as well.The overtemp alarm on your engine is a reliable indication of excessive engine temp.That along with the higher rpm point at which it is initiating is good cause to assume that engine is in fact overheating. You can do a search on these forums for VRO system disconnect as well.There are several discussions on the topic.

Hooty · Jan 5, 2003

Re: Evinrude 70hp 1989 High temp alarm

I'd try to figure out the reason for the alarm first. It might be a defective sender but it could also be a hot engine or the VRO, either of which could lead to high-dollar engine repairs. c/6 Hooty

ob · Jan 5, 2003

Re: Evinrude 70hp 1989 High temp alarm

Greg,You could rule out sender unit by either simply replacing ,testing in water at 160 degree + or getting a thermo melt stick of 163 degree and marking on several areas of heads and block and water testing.

rickdb1boat · Jan 5, 2003

Re: Evinrude 70hp 1989 High temp alarm

Ditto OB!!!!

Greg Holmes · Jan 6, 2003

Re: Evinrude 70hp 1989 High temp alarm

Hey,you guys are great! I've checked out the motor a little more intelligently overnight and also found a copy of the Seloc manual (vol.IV) at our local library. I believe I found the VRO pump (f'ard pt side of engine with a fuel and oil line connected underneath) it has a 3 wire harness (brown, blue, yellow) coming out the bottom that goes into the rest of the wiring harness at a large red connector. I looked at the last service invoice from Sept. 2002 and it is noted that the motor has non warning VRO pump, the thermostat was cleaned and checked and the pump and lobes were checked OK. It also noted the prop. bush was no good. I am not sure the VRO statement is correct as with a 3 wire harness I am guessing an alarm is present?? I'm also a little suspicious of the pump re the apparent overheating problem. It looks like I need to drop the bottom off the drive to get at the pump but from the exploded view this doesn't look to onerous - am I right?

OBJ · Jan 9, 2003

Re: Evinrude 70hp 1989 High temp alarm

Hey Greg... With your three wire system,you should have two alarms with the VRO. First alarm, 1/2sec beep every 20 seconds or so means low oil tank level. Second alarm, 1/2sec beep every 1/2 sec,wills sound most urgent, means you have a problem with oil to the VRO pump. A steady tone means over heat on your rig. Another question, When you turn the key to "ON", do you hear a momentary beep? If not, the horn module may be bad. The three wires will becoming out the aft protion of the pump. OBJim

Greg Holmes · Jan 9, 2003

Re: Evinrude 70hp 1989 High temp alarm

OutboardJim Can't say I have actually heard a momentary beep when I first turn on the key. I will have to listen for this. The only alarm I have heard is the steady beep. No intermittent 1/2 sec or 20 sec beeping at all. GregNZ

OBJ · Jan 9, 2003

Re: Evinrude 70hp 1989 High temp alarm

Greg, forgot to add this on the last note. When the warning horn goes off, is it more like a buzzer or a beep? If it's more like a buzzer, it won't give you a pre-test beep. And possibly the VRO alarms will not work either. OBJim

Greg Holmes · Jan 9, 2003

Re: Evinrude 70hp 1989 High temp alarm

Difficult to say. It is a high pitched continuous tone. G

OBJ · Jan 9, 2003

Re: Evinrude 70hp 1989 High temp alarm

OK...you got the beeper. The alarms are easy to check. For the low oil tank, remove the four screw holding the sending unit down to the tank and lift the unit up and out of the tank. The motor doesn't have to be running for this. Just turn the key on. It may take a few seconds for it to start beeping. While your at it and got the sender out, change out the filter at the bottom of the sender. For the no oil alarm, with the motor running, clamp or remove the oil supply line from the motor and watch the flow tube inside the motor. Once the oil clears the tube, it shouldn't be long before you get the no oil alarm. Some guys will run there motors on a pre-mixed tank for this one just in case the alarm dosen't go off. OBJim

Evinrude 70hp 1989 High temp alarm

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