Hello everyone,
A few weeks ago I was coming into my slip and sometimes I need to go in reverse at the last moment to “walk” the stern around. This time I accidentally pushed the throttle lever wide open while holding back on the shifter lever. She ran at high rpm for maybe 1-2 seconds before I backed off the throttle. Immediately after I started to hear a “ping ping pa pa ping pinging” sound. Not sure what it was at the time thought maybe it was in the gearbox. The next day I started it back up and noticed that the pinging was louder when it was cold and I still had forward and reverse. The engine sounded rough with an extra vibration so, after reading a few good threads, I went ahead and checked compression. I got 120 - 0 - 120 - 30 from back to front (flywheel is front). Thought maybe it’s a broken valve, so I decided it’s time to remove the head.
20 hrs later head is removed; it’s not a valve, I have a broken piston. So I guess my first question is “what is the cause”? “And is the block too corroded for a major overhaul“?
Also look what I found in the water jacket... it’s looks like metal shavings!
Anyway, I have the engine ready to be removed from the boat. I’m taking the block to a machine shop to have it inspected and cleaned. I’m hoping it’s still in good condition so I can perform the major overhaul. Any advice from this point is much appreciated!
“Sojourn”
1974 Cal 2-27
A few weeks ago I was coming into my slip and sometimes I need to go in reverse at the last moment to “walk” the stern around. This time I accidentally pushed the throttle lever wide open while holding back on the shifter lever. She ran at high rpm for maybe 1-2 seconds before I backed off the throttle. Immediately after I started to hear a “ping ping pa pa ping pinging” sound. Not sure what it was at the time thought maybe it was in the gearbox. The next day I started it back up and noticed that the pinging was louder when it was cold and I still had forward and reverse. The engine sounded rough with an extra vibration so, after reading a few good threads, I went ahead and checked compression. I got 120 - 0 - 120 - 30 from back to front (flywheel is front). Thought maybe it’s a broken valve, so I decided it’s time to remove the head.
20 hrs later head is removed; it’s not a valve, I have a broken piston. So I guess my first question is “what is the cause”? “And is the block too corroded for a major overhaul“?
Also look what I found in the water jacket... it’s looks like metal shavings!
Anyway, I have the engine ready to be removed from the boat. I’m taking the block to a machine shop to have it inspected and cleaned. I’m hoping it’s still in good condition so I can perform the major overhaul. Any advice from this point is much appreciated!
“Sojourn”
1974 Cal 2-27
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