496 HO...full impeller service, stainless pretty much the only option right?
05-03-2017, 10:52 PM
#21
Luckily mine were still mostly one piece but another season they would have come apart for sure. I would say anytime you buy a used 496 this should be baseline maintenance.
05-04-2017, 06:54 AM
#22
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05-05-2017, 06:43 PM
#24
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iTrader: (9)
FYI extremely common for all Merc heat exchanger set ups. Posted this info as well up here a couple of years ago for someone having cooling issues with their closed cooled Merc app..
Also makes common for warning horn going off for exhaust over heat temp alarm and fault code. FYI for whomever
Also makes common for warning horn going off for exhaust over heat temp alarm and fault code. FYI for whomever
05-09-2017, 08:31 AM
#25
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FYI on the Hardin stainless rebuildable pump. Ran the boat for the first time Sunday other than on a hose or simply backed into the lake on the trailer since the install last fall. Ran the snot out of it and unlike before I no longer get the 15 degree or so temp spike at idle after a hard run. Definitely flowing more water!
05-09-2017, 09:46 AM
#27
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^^^^^^^^^^^^^^ Thinking I may not wait until fall to change them. Wow! I've got 425 hours/12 seasons on mine.
05-09-2017, 08:29 PM
#29
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iTrader: (2)
400 hours fresh water, impellers changed every other year, never had one come apart. Boat never ran through sand, silt, mud, etc. You can see the groove wearing into the end surface and the water inlet/outlet side of the pump was much worse. Still carried OK water pressure but after hard runs the water temp was creeping up more than it used to in the past. These pumps are also known to spit the shafts out without warning. The Hardin pumps have larger shafts/bearings.
I could not imagine that assembly coming out at 5000 rpm and bouncing arounder the bilge.
05-09-2017, 08:32 PM
#30
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Doing basic impeller changes this year and the shaft slid right out of the brass housing. Outter bearing siezed and the housing now becomes the bearing. Not a scuff in the brass where the bearing seized just nice and shiney.
I could not imagine that assembly coming out at 5000 rpm and bouncing arounder the bilge.
I could not imagine that assembly coming out at 5000 rpm and bouncing arounder the bilge.
