81 Evinrude 25 HP - No fuel to bottom cylinder

[AlTn]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

pin placement in sketch is correct

 

[cchildr84]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

Ok. Last night I tried to fire it up, to no avail. I think I need to buy a new gas tank because the fuel wasn't making it to the fuel pump and carb. The starter engaged nicely and was turning it over, but with no fuel it ain't going to start.

Prior to actually trying to start it, I did my compression check and spark test. Compression was 125psi on both cylinders. Spark test not so much luck. Is there some sort of secret to a spark test cause I don't seem to have luck with the spark gap tester. I set it to a 1/2" like the manual says place the tester in the spark plug wire lead and clamp it to a bolt on the block. I have two brand new coils, so I would assume it's not the coils. Any help on the spark check would be appreciated.

 

[cchildr84]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

As an added bonus, as I was trying to turn the motor over last night, it start pumping water out of the tale tale. So at least I know the water pump remplacement was done correctly.

 

[jasper60103]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

Ok. Last night I tried to fire it up, to no avail. I think I need to buy a new gas tank because the fuel wasn't making it to the fuel pump and carb. The starter engaged nicely and was turning it over, but with no fuel it ain't going to start.

Prior to actually trying to start it, I did my compression check and spark test. Compression was 125psi on both cylinders. Spark test not so much luck. Is there some sort of secret to a spark test cause I don't seem to have luck with the spark gap tester. I set it to a 1/2" like the manual says place the tester in the spark plug wire lead and clamp it to a bolt on the block. I have two brand new coils, so I would assume it's not the coils. Any help on the spark check would be appreciated.

I would take an ohm meter and verify continuity between the ground lead of the power pack to the ground tabs on the coils.

edit: Also, disconnect the kill switch.

 

[cchildr84]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

I would take an ohm meter and verify continuity between the ground lead of the power pack to the ground tabs on the coils.

edit: Also, disconnect the kill switch.

Ok, so what is the process for checking the continuity. I have a nice fluke meter, set it to ohms. So I disconnect the kill swith connector, then what. I place the positive leed from the ohm meter to what and the negative lead from the meter to the ground lead of the power pack, then what? push the start button? How many ohms is a good reading?

 

[jasper60103]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

Ok, so what is the process for checking the continuity. I have a nice fluke meter, set it to ohms. So I disconnect the kill swith connector, then what. I place the positive leed from the ohm meter to what and the negative lead from the meter to the ground lead of the power pack, then what? push the start button? How many ohms is a good reading?

Just trying to verify your ground path. Not trying to start the motor or check spark with this test.

Place one probe on the power pack ground and the other to the coil ground tab. Negative or positive lead, it doesn't matter.
You should read close to zero ohms.
Then move the probe from the coil ground tab to the other one.
Again, you should read close to zero ohms.

Hope this helps.

 

[cchildr84]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

Just trying to verify your ground path. Not trying to start the motor or check spark with this test.

Place one probe on the power pack ground and the other to the coil ground tab. Negative or positive lead, it doesn't matter.
You should read close to zero ohms.
Then move the probe from the coil ground tab to the other one.
Again, you should read close to zero ohms.

Hope this helps.

Ok, I'll try to do this a lunch. When you say move the probe fromt the coil ground tab to the other one, do you mean the ground tab on the second coil?

Just for my own education, how can you get an electrical reading if there isn't any power/charge being introduced. So that is to say if we're not trying to start the motor, which engages power from the battery, how does the power pack put out anything to read. I'm no electrician, so I'm just trying to educate myself here.

 

[jasper60103]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

... When you say move the probe fromt the coil ground tab to the other one, do you mean the ground tab on the second coil?

...

Yes, that is correct.

...

Just for my own education, how can you get an electrical reading if there isn't any power/charge being introduced. So that is to say if we're not trying to start the motor, which engages power from the battery, how does the power pack put out anything to read. I'm no electrician, so I'm just trying to educate myself here.

In this test, we want to verify your power pack and coils are electrically grounded. If not, you will not see any spark.
The meter supplies just a tiny bit of current to test if there is a path between the two points you are measuring.

 

[cchildr84]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

I would take an ohm meter and verify continuity between the ground lead of the power pack to the ground tabs on the coils.

edit: Also, disconnect the kill switch.

Ok. I tested during lunch and with the ohm meter it was reading 0.2 ohms. So based on the other comments above, this verify's the grounding path, yes? With the kill switch disconnected, I tried to check for spark, and still got nothing. This eliminates the kill switch as a problem, yes? How does one verify if the power pack is the issue, with regards to spark? Although, now that I think about it I didn't unscrew the grounding strap to the kill switch, just the three pin connector harness. Does this still rule out the kill switch?

 

[Bosunsmate]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

throw some two stroke mix in the cylinders if you arent sure about your fuel getting there yet as otherwise your new gear will be deteriorating fast.
Check in here to verify if powerpack is the issue
ISSUU - CDI Electronics Practical Outboard Ignition Troubleshooting by CDI Electronics

I doubt it though as you didnt have spark problems before you started taking it to bits?
Try grounding a spark plug to a bolt and see if you get even a small spark, ie one that a spark tester wouldnt show

 

[jasper60103]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

Ok. I tested during lunch and with the ohm meter it was reading 0.2 ohms. So based on the other comments above, this verify's the grounding path, yes? With the kill switch disconnected, I tried to check for spark, and still got nothing. This eliminates the kill switch as a problem, yes? How does one verify if the power pack is the issue, with regards to spark? Although, now that I think about it I didn't unscrew the grounding strap to the kill switch, just the three pin connector harness. Does this still rule out the kill switch?

cchildr84,
if I understand you correctly, you did a spark test w/o the power pack connected?
This will never work. Reconnect the power pack. You can disable the kill switch by
removing its ground lead from the top coil.
Give this a try and report back.

 

[cchildr84]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

throw some two stroke mix in the cylinders if you arent sure about your fuel getting there yet as otherwise your new gear will be deteriorating fast.
Check in here to verify if powerpack is the issue
ISSUU - CDI Electronics Practical Outboard Ignition Troubleshooting by CDI Electronics

I doubt it though as you didnt have spark problems before you started taking it to bits?
Try grounding a spark plug to a bolt and see if you get even a small spark, ie one that a spark tester wouldnt show

Actually, when I did the same test before, I wasn't getting a spark either. Even though it did start the day I bought it.

 

[cchildr84]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

cchildr84,
if I understand you correctly, you did a spark test w/o the power pack connected?
This will never work. Reconnect the power pack. You can disable the kill switch by
removing its ground lead from the top coil.
Give this a try and report back.

10-4 will do. Gonna get a new fuel tank tonight after work as well.

 

[cchildr84]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

Ok. I took the ground strap off the kill switch and still no spark. What's the next step to test. Also I got a new tank and still can't get the primer bulb hard. The line is only about a year old, and it works fine on my 10 up motor. This may sound like a silly question, but can someone confirm that on the fuel pump, the connection that is straight up and down goes to the gas line connection and the connection that is at an angle goes to the carburetor? I can't for the life of me figure out why fuel won't get to the fuel pump.

 

[Dan757]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

If you disconnect the fuel line from the fuel pump and then pump the bulb does fuel pump out of the end of the line (you may have to siphen to get it started)? If so then while it is all primed up put the line back on and squeeze the bulb, does it get hard now? Does it stay hard? The check valve in the bulbs can go bad.

 

[cchildr84]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

So, I feel a little dumb, but I looked at the old fuel pump that was on the motor which still had one of the fuel lines on it, and it looks like I have the lines backwards. I'll have to switch them around when I get home.

 

[jasper60103]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

Ok. I took the ground strap off the kill switch and still no spark. What's the next step to test. Also I got a new tank and still can't get the primer bulb hard. The line is only about a year old, and it works fine on my 10 up motor. This may sound like a silly question, but can someone confirm that on the fuel pump, the connection that is straight up and down goes to the gas line connection and the connection that is at an angle goes to the carburetor? I can't for the life of me figure out why fuel won't get to the fuel pump.

Hmmm. I'm running out of ideas. The problem could be further up stream since this is a rebuild. Someone previously posted the CDI site for troubleshooting the no spark issue.
Also, you said it ran before you tore it down, and you didnt see spark? Maybe its just a procedural error? Here's a video for reference. He does a decent job except for not grounding the other plug wire.

1988 Johnson 30HP Outboard - Compression and Spark Test - YouTube

 

[cchildr84]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

Yeah, I just bit the bullet, and have a new power pack, sensor assembly, and charge coil on order. Those are the only ignition components left. I'll start with just putting the power pack on and hope that fixes it so I won't have to take the flywheel back off. I followed the same procedure for the spark test as in the video, except I have (2) gap testers, so that both plug leads are grounded.

 

[cchildr84]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

So, I feel a little dumb, but I looked at the old fuel pump that was on the motor which still had one of the fuel lines on it, and it looks like I have the lines backwards. I'll have to switch them around when I get home.

Well, I got home at lunch and checked the lines, and they actually were located correctly. But I did have to siphen the line in order to get fuel to the pump; gasoline tastes nasty if anyone was wondering. Haha. So I think Im getting fuel to the pump and carb. Now we just have to wait for the ignition parts to come in so I can get a spark. I expect those to arrive either saturday or monday.

 

[cchildr84]

Re: 81 Evinrude 25 HP - No fuel to bottom cylinder

Here's a random question as I'm waiting on the ignition parts to come in. Can you do the spark test with the plugs in. That is to say, the gap testers would be plugged in to the plug wires and grounded to the block, but leave the plugs in. I ask because the other day when I did my spark test, I put a little fuel in the cylinders via the spark plug holes, and when I did the spark test, all it did was spit the fuel back out the plug holes.