hpk1012
New Member
- May 24, 2021
- 10
- Boat Info
- 280 Sundancer2010
- Engines
- 350 MAG Mercruiser w/Bravo III Drives
I did preventive maintenance to change impeller myself - used non-OEM Sierra to replace previous Sierra impeller that lasted over 100 hours with no problems and no previous overheating. Boat alarmed (high temp) on 1st outing after changing impeller.
Pulled belt and turned pump by hand and impeller sounded free and moved fairly easily. Thought about priming and put boat in water and used my flushing attachment to flood the imput hose and started boat that way. Took long test run including full speed and everything was normal!
Put boat up on lift after the successful test ride and today (a few days later) on 2nd test run boat alarmed once again (happens very quickly), this time saying low water flow but also of course had high temp. I am thinking something to do with fit of impeller leading to priming issue once on lift? Other possibility is some debris plugging downstream however this seems less likely to me because it seems like that problem would have appeared while running on the old impeller.
Any ideas? Am thinking to order OEM impeller and change it out to see if there's a slight difference before I try disconnecting multiple hoses to backflush.
Pulled belt and turned pump by hand and impeller sounded free and moved fairly easily. Thought about priming and put boat in water and used my flushing attachment to flood the imput hose and started boat that way. Took long test run including full speed and everything was normal!
Put boat up on lift after the successful test ride and today (a few days later) on 2nd test run boat alarmed once again (happens very quickly), this time saying low water flow but also of course had high temp. I am thinking something to do with fit of impeller leading to priming issue once on lift? Other possibility is some debris plugging downstream however this seems less likely to me because it seems like that problem would have appeared while running on the old impeller.
Any ideas? Am thinking to order OEM impeller and change it out to see if there's a slight difference before I try disconnecting multiple hoses to backflush.