Went for a quick daysail yesterday and engine is fine leaving the slip. Sail out, have lunch, fire it back up to retrieve the hook and the small hose out the transome above the exhaust starts squirting like a jet and the exhaust has very little water exiting. Temp guage goes to 180 when normally it barely moves. Shut it down and sail back. With alot of aprehension I fire it up to get back in the slip and everything is normal. What's going on with my trusty little 16hp Universal diesel?
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Doug, What is the small hose above the exhaust? If you had sucked something up against the sea water inlet, it would have caused the heatup and the lack of cooling water, and then, if it fell off while sailing, you would have been restored. Even on my saildrive-eqipped O28, the only holes in the transom, other than exhaust, were for bilge pumps and cockpit drains. If you have a strainer on the sea water inlet side, check it for debris. It might be enlightening. Bill Coxe, O40 Kukulcán, New London, CT
I thought
that it was some kind of excess, pumping more water than the muffler needs, relief or something. It comes off a T in a hose that I believe runs to the muffler. Normally that little hose just dribbles very little. Water was shooting out like a jet ski spout.
that it was some kind of excess, pumping more water than the muffler needs, relief or something. It comes off a T in a hose that I believe runs to the muffler. Normally that little hose just dribbles very little. Water was shooting out like a jet ski spout.
Is she fresh or salt water cooled?
If she is a salt water cooled engine then surely the recycle hose got clogged. Probably at the thermostat housing. The recycle hose returns hot water to the raw water pump so that the engine can get up to temp. If it is clogged the pressure in the block goes up and the amount coming out the exhaust would normally increase. Unfortunately the fitting that attaches to the recycle hose also goes to the exhaust elbow so no cooling water flows. I suspect the little hose on the stern is a bypass to bleed air back into the engine once she is off but not sure. In any case if it does connect to the block the pressure increase would make it squirt like crazy. I'd check the thermostat housing. I is probably a big hunk of zinc that broke loose.
If she is a salt water cooled engine then surely the recycle hose got clogged. Probably at the thermostat housing. The recycle hose returns hot water to the raw water pump so that the engine can get up to temp. If it is clogged the pressure in the block goes up and the amount coming out the exhaust would normally increase. Unfortunately the fitting that attaches to the recycle hose also goes to the exhaust elbow so no cooling water flows. I suspect the little hose on the stern is a bypass to bleed air back into the engine once she is off but not sure. In any case if it does connect to the block the pressure increase would make it squirt like crazy. I'd check the thermostat housing. I is probably a big hunk of zinc that broke loose.
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