1996 70 HP Evinrud

[Mangum]

I have a 1996 Evinrude 70 HP Molel No. E70TLEDA S/N G 03953494 that will start right up and run for 35 min. and stops and will not start up for 30 min.? I have serviced the lower unit and it is pumping water grate. It does the same thing every time I take it out 4 or 5 times? Can any one help? dennmang3@aol.com

 

[jtexas]

Re: 1996 70 HP Evinrud

First, check your fuel tank to make sure the vent is open.
When it quits, is the primer bulb still firm?
If so, then check for spark while it won't start.

 

[Mangum]

Re: 1996 70 HP Evinrud

I have checked spark and it is good

 

[jtexas]

Re: 1996 70 HP Evinrud

Has it been like this ever since you got it?
What maintenance has been done to it recently?
Is the fuel line holding pressure?
Is the fuel tank vent open?

When it stops, does it just quit suddenly, as if you turned the key off, or does it cough and sputter then quit?

 

[Mangum]

Re: 1996 70 HP Evinrud

Just fulled it up with gas and it came out of the over flow vent. When it stops it is suddenly. I was told it was the power pack so I checked the spark at the plug when it will not start and the fire is good so I was told it was not the power pake but will not hit. Let it set about 35 min. and it will start every time youturn the key?? As for the primer bulb have not checked that yet because of the way it stops but I will do that tomorrow. Anything ells? Thanks for the help. I can not afford the $100 an hr. the boat shop charges here.

 

[tashasdaddy]

Re: 1996 70 HP Evinrud

it sure sounds electrical. did you check spark on every plug. you need to do this immediately after it stops. also check if the bulb has sucked flat, which i doubt, since it does not sputter, and die a slow death. fuel and compression would be slow death, electronics is the fast death.

 

[Mangum]

Re: 1996 70 HP Evinrud

Yes I checked each plug. And it sound elec. to me also by the way it stops or heat but it is puting out water very good. And no it has not done this all of the time. I have had this boat about 5 years. The motor does fill hot to me but I dont know how hot it should fill. I found what I think is the heat sensor and unpluged it one time when it stoped and it didnt help. A boat shop told me to bring it in and they whoud check it out for $100 an hr. but would not give me any time it could take. ????????

 

[jtexas]

Re: 1996 70 HP Evinrud

Its possible to get a spark from a spark plug outside the cylinder, but it's too weak to spark under compression. An inline spark tester is a couple bucks at auto parts store, set the gap for 7/16" and look for a sharp blue spark. Powerpack failing when it heats up is a possibility.

The temp switch is on a tan wire near the top of the cylinder head, if you peel back the rubber sleeve and touch the bare wire to the head with the key "on", and hear a steady tone from the buzzer, that confirms that your overtemp warning circuit is functional. Course it doesn't guarantee than the sensor is sensing correctly. With the engine idling, you should be able to hold your fingers against the cylinder head for several seconds with no permanent damage.

 

[Mangum]

Re: 1996 70 HP Evinrud

When I checked the spark it was with a part I got from a friend that went inline. One end went to the plug in the motor and the other end went to the spark plug wire and in the wire it should a good spark on all 3 plugs. I have unpluged the temp switch when the motor was running and it would run with it unpluged so I went out with the boat and ran it until it stoped and unpluged the heat sensor and it would not start until about 30 min. I can hold my fingers on the head only about 1 or 2 seconds. The heat sensor has 2 wires to a rubber plug and I have removed it from the head and just looked at it. It just goes into a hold in the head. It looks like to me that if that was it, it would start when I unpluged it. I am thinking about taking the boat out today and checking the gas blub as you said but if it is a gas problem you would think it would not stop suddenly.

 

[ezeke]

Re: 1996 70 HP Evinrud

The heat sensor is a switch that is supposed to sound an alarm horn or turn on a light or both when the engine overheats. It does not stop or start the engine or prevent it from running. The sensor activates the alarm by grounding the alarm by way of the tan wire. The other wire activates S.L.O.W. if the wire is black and white and runs to the power pack.

Overheating can stop the engine by binding it. That can be caused by insufficient oil or insufficient cooling water. It would be a good idea to find out which before you ruin your engine.

The fact that water is flowing out of the tell-tale indicates that the water pump is working. It does not tell you that the water is actually flowing through the engine. If the thermostat is bad or blocked, you would still get a good flow through the tell-tale and nothing through the engine.

 

[Mangum]

Re: 1996 70 HP Evinrud

Do you know how I can check these two things?

 

[ezeke]

Re: 1996 70 HP Evinrud

You can start by taking the thermostat out and checking it in a pan of water. It should open just about 140 degrees F. Use a meat thermometer to track the water temperature. Also clean the thermostat housing and check for material that could slow the flow of water.

You should be able to track the amount of oil being drawn from your oil tank by marking the level.

 

[Mangum]

Re: 1996 70 HP Evinrud

Is the thermostat the part I removeed and looked at on the top and is a round siver thing with two wires coming out of it just goes in anopen hole and is held in by 1 nut or see this just a sensor? The motor smokes the 1 st time I start it so I would think it is getting oil. What do you think>

 

[ezeke]

Re: 1996 70 HP Evinrud

The thermostat housing is at the top of the cylinder head and is held in place by 4 screws. If you have never had it off, you will probably want to get a gasket before you get too far into this - part # 0329830.

You can see the parts breakdown on each section of your motor on the BRP Shop Evinrude site: http://shop.evinrude.com/

Click the image of a parts diagram, then navigate to your motor. The thermostat is shown on the "Cylinder and Crankcase" diagram.

 

[Mangum]

Re: 1996 70 HP Evinrud

Is this what you would next with the way it is stoping?

 

[tashasdaddy]

Re: 1996 70 HP Evinrud

check the black with yellow chaser wire. this is the kill wire, and could be arcing to something, shorting out, killing the fire.

 

[Mangum]

Re: 1996 70 HP Evinrud

This is stranger? When I was at the boat house yesterday just looking at the motor the battery was low so I put the charger on it and today I just went down to look at where the thermostat was at and the motor was hot, not as hot as when it cuts off but I could put my hand on it and live it put I was suppressed at how worm it was not to have been run in 2 days? As for the chaser wire, it has fire when it will not start. Is there something that if the motor gets to hot it will not let it start, even if it has fire and gas until it cools off? The thermostat looks like it has never been out. By doing this 4 times in the same time it looks like to me it must be heat or elec. The heat sensor was 2 wires, if I unplug it and srort out the 2 wires, would this make the buzzer go off and let me know then that the heat sensor is not working?

 

[ezeke]

Re: 1996 70 HP Evinrud

You may have an open circuit. It would be a good idea to disconnect all your rectifier wires at this time.

You need to have a battery switch or disconnect the battery from your motor when charging.

The tan wire is the wire for the alarm.

If you ground the remote control section of the tan wire to the engine block with the ignition switch in the run position the alarm should sound. If it does not, you have a wiring problem, or a bad horn

 

[Mangum]

Re: 1996 70 HP Evinrud

Checked the tan wire and the alarm works. I found a boat deler to take to me about this problem in Va. and he said if I have spark and I have gas it should start. So I am back to the gas. I will take it out tomorrow and check the gas bulb and see if it is tight.

 

[Mangum]

Re: 1996 70 HP Evinrud

No good. Same problem. Any more idea?