Hi guys, I have a Evinrude 2 stroke 1979 70hp.
I was running the motor for around 10 mins on a high idle and then it slowly started to die off.
When it died of it sort of 'seized' in place and it wouldn't turn over. I removed the plugs and found cylinder 2's plug to be in half... After some direct 2 stroke oil it freed up. I then did a compression test and it was 100% as before (80,80,80). I then cranked it over to remove the oil and whatever was left in the cylinder.
I then reconnected it with a new plug and it fired up however I noticed that water is coming out of the back of the motor near the head cover. I turned it off and tried cranking without plugs in and found that water is coming out of cylinder 2. It does run, but baddly. I have heard two different responses on what I should focus on. Either head gasket or exhaust. If it is exhaust it's not worth fixing if its head its doable.
I will pull the head and see if the gasket is blown but wouldn't that show a decreased compression? Especially on cylinder 2?
What are your thoughts and where should I start (or if I even should)
EDIT - I presume this was caused by a poor 2 stroke mix or over heating (water pump/ thermostat just replaced though).
I was running the motor for around 10 mins on a high idle and then it slowly started to die off.
When it died of it sort of 'seized' in place and it wouldn't turn over. I removed the plugs and found cylinder 2's plug to be in half... After some direct 2 stroke oil it freed up. I then did a compression test and it was 100% as before (80,80,80). I then cranked it over to remove the oil and whatever was left in the cylinder.
I then reconnected it with a new plug and it fired up however I noticed that water is coming out of the back of the motor near the head cover. I turned it off and tried cranking without plugs in and found that water is coming out of cylinder 2. It does run, but baddly. I have heard two different responses on what I should focus on. Either head gasket or exhaust. If it is exhaust it's not worth fixing if its head its doable.
I will pull the head and see if the gasket is blown but wouldn't that show a decreased compression? Especially on cylinder 2?
What are your thoughts and where should I start (or if I even should)
EDIT - I presume this was caused by a poor 2 stroke mix or over heating (water pump/ thermostat just replaced though).