I am in the process of trying to bring my Dad's 1978 35 hp Evinrude motor back to life. It has been sitting in my workshop for at least 4 years, before that 5-7 years sitting in the weather with the foot off of it.
When he quit using it he said that it needed a water pump. He pulled the foot but never got around to repairing it. Sadly, he died about 4 years ago so I have no idea what else was wrong with it
I have the motor on a stand, motor turns freely, has a good compression "pop" to it but only has about 95 lbs on each cylinder with only Marvel Mystery Oil in the cylinders.
I was getting spark on one cyl but not the other so I ordered a new coil and installed. Still no spark on the same cylinder. I plugged the inop coil lead into the second cyl pin and have a spark so I guess that was the first mistake, replacing a coil that was apparently ok to start with.
Checked all of the wiring back to the power pack to make sure nothing was broken and realized that he must have run this thing incredibly hot because the shielded harness from the coil to the power pack was melted against the motor and the power pack itself was melted where it was bolted also the whole side of it closest to the motor shows signs of heat damage. Closer inspection also showed the coils themselves were somewhat melted where they come closest to the motor.
I am now questioning whether the cylinders may be wiped out because of the excessive heat that it clearly had. Also questioning what I am getting into.
Question 1: If I am getting spark on one coil, but not the other, is it safe to assume that everything under the flywheel is ok?
Question 2: Is it possible that because of the heat damage the power pack could have dropped power to one coil without dropping power to the other?
Question 3: Is 95 lbs of compression enough or should I be counting on re-doing the cylinders?
Question 4: Ballpark, how much is it going to cost me if I have to replace two pistons, with machining, with ring kits and all gaskets? I would do the work myself, with the exception of any machining of course.
Thank you in advance for any advice or wisdom.
When he quit using it he said that it needed a water pump. He pulled the foot but never got around to repairing it. Sadly, he died about 4 years ago so I have no idea what else was wrong with it
I have the motor on a stand, motor turns freely, has a good compression "pop" to it but only has about 95 lbs on each cylinder with only Marvel Mystery Oil in the cylinders.
I was getting spark on one cyl but not the other so I ordered a new coil and installed. Still no spark on the same cylinder. I plugged the inop coil lead into the second cyl pin and have a spark so I guess that was the first mistake, replacing a coil that was apparently ok to start with.
Checked all of the wiring back to the power pack to make sure nothing was broken and realized that he must have run this thing incredibly hot because the shielded harness from the coil to the power pack was melted against the motor and the power pack itself was melted where it was bolted also the whole side of it closest to the motor shows signs of heat damage. Closer inspection also showed the coils themselves were somewhat melted where they come closest to the motor.
I am now questioning whether the cylinders may be wiped out because of the excessive heat that it clearly had. Also questioning what I am getting into.
Question 1: If I am getting spark on one coil, but not the other, is it safe to assume that everything under the flywheel is ok?
Question 2: Is it possible that because of the heat damage the power pack could have dropped power to one coil without dropping power to the other?
Question 3: Is 95 lbs of compression enough or should I be counting on re-doing the cylinders?
Question 4: Ballpark, how much is it going to cost me if I have to replace two pistons, with machining, with ring kits and all gaskets? I would do the work myself, with the exception of any machining of course.
Thank you in advance for any advice or wisdom.
