I usually replace the seawater pump impeller on my '94 7.4L Mercruiser every 2-3 years. Its now been 4 years and I kept thinking all spring/summer "Probably should do the impeller thing soon." Well, you know what happened. Cranked it up today and within a few minutes I could hear the alarm. Checked all the gauges and sure enough, the water temp was rising way beyond the normal range. Always keep a spare kit, so I'm ready to do the repair.
Did a search just to refresh my memory. I noticed in one thread a mention of doing a backflush, especially if any of the vanes are broken. What is the procedure to do the backflush? I'm assuming I take off the hose from the output side of the seawater pump. But where downstream from there do I use a garden hose to do the backflush?
Did a search just to refresh my memory. I noticed in one thread a mention of doing a backflush, especially if any of the vanes are broken. What is the procedure to do the backflush? I'm assuming I take off the hose from the output side of the seawater pump. But where downstream from there do I use a garden hose to do the backflush?