Water in engine (aft cylinder) and carb in a pitching sea. Atomic Four in a ’72 Pearson.
I’ve extended the vertical drop of the riser, put a flap on the transom, put a one way valve in the exhaust as close to the bottom of the riser as I can, cut out as much of the exhaust line as possible ( to eliminate trapped water) cut through bulk heads to lower the run of the exhaust line ( again to eliminate trapped water that I ASSUME is being thrown back into the engine ) . I’ve also taken to running her dry for between 5 to 10 seconds prior to cutting the engine off; this seems to help.
I’ve tested the manifold for leaks by blowing smoke into the exhaust line with the carb off.
I installed a water trapping gas filter; water is not coming in from the gas tank.
This does not happen when the boat heals hard to either side, but almost always when she pitches back and forth, as in yesterday in no more than a 2 foot sea.
Someone suggested baffles in the manifold might be corroded – but I don’t know if the A4 was built this way.
Any ideas much appreciated
I’ve extended the vertical drop of the riser, put a flap on the transom, put a one way valve in the exhaust as close to the bottom of the riser as I can, cut out as much of the exhaust line as possible ( to eliminate trapped water) cut through bulk heads to lower the run of the exhaust line ( again to eliminate trapped water that I ASSUME is being thrown back into the engine ) . I’ve also taken to running her dry for between 5 to 10 seconds prior to cutting the engine off; this seems to help.
I’ve tested the manifold for leaks by blowing smoke into the exhaust line with the carb off.
I installed a water trapping gas filter; water is not coming in from the gas tank.
This does not happen when the boat heals hard to either side, but almost always when she pitches back and forth, as in yesterday in no more than a 2 foot sea.
Someone suggested baffles in the manifold might be corroded – but I don’t know if the A4 was built this way.
Any ideas much appreciated
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