"James Gemmill" gemmilljim@hotmail,com wrote in message
...
Is it necessary to replace the water intake impellor every year?

No. I would if you run in a sandy area. I would replace every 2 years at
the least. I ran one for 5 years, and was still good, but was a bugger to
get the leg off the engine. Now at 2 years and good anti-seize on the drive
shaft, is an easy job.
Bill