How do I know if I need to replace my impeller?
A boat impeller needs to be replaced if its vanes are slightly melted or have cracks in the roots, or worn off. Yet, many experts suggest yearly replacement as a general rule regardless of its condition, but you can do it whenever you see any visible loss OR do it yearly for peace of mind.
How often should you change impeller on Mercury outboard?
Mercury recommends changing the impeller every 300 hours…its in the owners manual. It’s an easy enough job to do yourself if you have some mechanical skills.
What causes a boat impeller to go bad?
Abrasive sandlike material can cause the impeller to wear out faster. Impellers can also wear out by becoming stiff and brittle due to the motor sitting unused for several seasons or being exposed to heat. Water lubricates the impeller, and if it’s run dry, the impeller can be ruined in a few seconds.
How long does an outboard impeller last?
All impellers should be changed at a minimum of three years. Some will not make it that long depending on many things, how often it is used…
Is it hard to change boat impeller?
Changing an impeller is not a daunting task and it’s one that every boater should consider adding to their arsenal of DIY maintenance. Changing an impeller, on many engines, usually takes less than 20 minutes even if you are fairly slow. The most complicated aspect of the task is physical access to the pump.
How often should the impeller be replaced?
It’s generally recommended that the impeller and related cooling system components be replaced every 100 hours, which for the average New England boater translates to 2 seasons of use.
How often do you replace your impeller?
If you haven’t changed the impeller when you inspect the water pump, as part of the preparations for the winter layup or the spring fitting-out, three years is the outer limit. One manufacturer’s yearly or 100-hour maintenance schedule does not include an inspection of the water pump and impeller, but insists you change the impeller at 300 operating hours or three years, whichever comes first.
Do I need to replace my impeller?
In most cases you will never need to replace the water pump assembly, just the impeller. Sometimes the rubber impeller becomes un-bonded to the metal hub making for an inoperative pump. Inspection : Check if there is any wear or deformities on the impeller, if so then replace it. Also check for deterioration/scoring of the stainless steel base plate along and the housing cup that the impeller sits in for wear or grooves, you may consider replacing both the plate AND cup, OR the complete
What is underfiling of impeller?
Under-filing is the retrospective machining of impeller vanes on centrifugal pumps with low specific speeds for the purpose of slightly increasing the head at the design point. Under-filing the concave side of backward curved impeller vanes results in a slightly steeper vane outlet angle.