Home › Forum › Ask A Member › Merc 1100 Tower of Power Restoration › Reply To: Merc 1100 Tower of Power Restoration
I did the compression test. All cylinders are within 10 psi of each other. The top two look about like the others. They range from 120-130 psi. Based on this, I don’t intend to open the crankcase. I don’t want to kick any sleeping dogs.
I have three broken off bolts on the cylinder head cover. Two are on the starboard side and I tapped them toward the front of the motor and they came out. I think I can get the one on the port side by using a Dremel grinder to carefully remove the nut from the shank of the bolt and then push the shank toward the back of the motor and out.
Should I use stainless bolts on the cylinder cover?
I inspected the check valves on the crankcase drains. They will pass air in both directions. Shouldn’t they have a check ball in them? Mine don’t. Also, the keeper was not bent into the correct position to hold them from rotating. This looks like results from previous repair work.
The exhaust cover looks good and I can’t see any signs that it was leaking water. I don’t plan on removing it at this time because I would expect to break bolts trying to get them off. I’ll see if it leaks when it is running and then decide what to do unless I get different advice from one of you experts.
At this point it is so far, so good.