First let's be honest new Boaters do stupid things, and I am no different. The boat is a Hunter 31, 1987, Yanmar 2GM20F. In October of last year while still learning which was up, the Admiral and I were on our way back in to the canal system and to our slip, we were about a half mile from the channel entrance and would still have another 3/4 mile trip to the slip. There develops a smell like boiling water, but no alarm. I brought the engine down to idle, went below and steam was coming off the engine, it was a mid 90's day and I had plenty of water on board so I kept the engine running and dousing it with water. Got the boat docked and let everything cool down. The sea water pump literally hung on the engine and when the pulley was removed it fell apart in my hands. I replaced both pumps, belts all the hoses, new anti-freeze, oil, and fuel pump and filters.
Engine was fired up up but continued to run hot, so I cleaned out the heat exchanger, replaced gaskets, and replaced the mixing elbow and the exhaust header. Reset the timing on the valves, a local yanmar tech gave the valve setting of .008, now thinking that this was metric that was a wide gap, so I set to the valves to a gap of .008 metric. Closed up the valve covers, reinstalled the belts and attempted to start the engine. The smoke coming out of the exhaust was unreal, backfiring. I shut everything down. And sat there, lost.
went home did a ton of research on the settings and found that .008 is inches and not metric , metric is .2 mm, I reset the valves and everything seems to be okay, with some "minor black smoke'.
In January we took the boat out to watch a local regatta, and while under sail using the foresail the boat caught a major wind shift, (3 of the boats in the race spilled over) and we suddenly found ourselves healing to starboard with water almost coming over the starboard coaming of the cockpit, I straightened us up, we had lost a fender and I headed back to do a pickup. Off we went for the rest of the day, later we started the engine and boom started and stopped. A line was caught in the prop. We got towed to our slip.
So the next item was to get the bottom done, wet sanded, compounded and waxed the hull, new seacocks, do the stuffing box. All done all good. I bring it back to our slip and I am getting ready to paint the deck do some spider cracks and I am leaning over the stern and I look down and from the water line up about 6" i am looking at what I can only describe as black soot.
So now I ask where is the soot coaming from and so uniformly across the stern. Any help would be appreciated.
After all who thought you'd have so many issues with the engine on a sailboat.
Engine was fired up up but continued to run hot, so I cleaned out the heat exchanger, replaced gaskets, and replaced the mixing elbow and the exhaust header. Reset the timing on the valves, a local yanmar tech gave the valve setting of .008, now thinking that this was metric that was a wide gap, so I set to the valves to a gap of .008 metric. Closed up the valve covers, reinstalled the belts and attempted to start the engine. The smoke coming out of the exhaust was unreal, backfiring. I shut everything down. And sat there, lost.
went home did a ton of research on the settings and found that .008 is inches and not metric , metric is .2 mm, I reset the valves and everything seems to be okay, with some "minor black smoke'.
In January we took the boat out to watch a local regatta, and while under sail using the foresail the boat caught a major wind shift, (3 of the boats in the race spilled over) and we suddenly found ourselves healing to starboard with water almost coming over the starboard coaming of the cockpit, I straightened us up, we had lost a fender and I headed back to do a pickup. Off we went for the rest of the day, later we started the engine and boom started and stopped. A line was caught in the prop. We got towed to our slip.
So the next item was to get the bottom done, wet sanded, compounded and waxed the hull, new seacocks, do the stuffing box. All done all good. I bring it back to our slip and I am getting ready to paint the deck do some spider cracks and I am leaning over the stern and I look down and from the water line up about 6" i am looking at what I can only describe as black soot.
So now I ask where is the soot coaming from and so uniformly across the stern. Any help would be appreciated.
After all who thought you'd have so many issues with the engine on a sailboat.
