nixdorf Posted September 30, 2015 Posted September 30, 2015 My Mercury 90HP two stroke (2004 model) ate its water impeller this weekend. It left me stranded miles from the boat ramp. Not a comforting feeling, especially when I changed the 10 year old impeller out for a new (aftermarket) one six months ago. Yes, the previous owner never changed the impeller. Anyway, I pulled the lower unit off and popped open the impeller housing to find an impeller with one of six fins/tines left intact. I found four of the other fins inside the water pump housing, but could not find the last one. Should I be concerned about the last one? Could it have been sent "upstream" into the upper unit and get lodged somewhere? Given that impellers fail all the time, I would assume that Mercury would design something to catch foreign objects in the water lines. But I don't know. Any help you can offer is greatly appreciated. Needless to say, an OEM replacement impeller is on its way to me. Quote
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