Raw water pump replace/maintenance
#21
Banned
![Default](/forums/images/icons/icon1.gif)
Merc black plastic housings always use the new wear plate and the 2 new O ring gaskets - one small round and the other bigger O ring on the front side of housing (lip)
Tightening is 10 ft lbs max in a star tightening pattern and I like to use the 3 pass rule for tightening. Always makes sense to me.
Tightening is 10 ft lbs max in a star tightening pattern and I like to use the 3 pass rule for tightening. Always makes sense to me.
#22
Registered
![Default](/forums/images/icons/icon1.gif)
Thanks all. Always new wear plate? Even if no sand or silt (next to no silt I suppose, limestone bottom lake)?
I found the small quad ring, but the larger one for the housing doesn't seem to be available solo. Anyone got a P/N or source for it?
I found the small quad ring, but the larger one for the housing doesn't seem to be available solo. Anyone got a P/N or source for it?
#23
Registered
Thread Starter
![Default](/forums/images/icons/icon1.gif)
Its 25-841807
I always replace the quad ring but have yet to replace the O-ring, and have yet to have a leak. Not saying it's not a good idea to replace but I'm in fresh water and never use oil or other on the ring
I always replace the quad ring but have yet to replace the O-ring, and have yet to have a leak. Not saying it's not a good idea to replace but I'm in fresh water and never use oil or other on the ring
#24
Banned
![Default](/forums/images/icons/icon1.gif)
Its best to buy the kit - comes with even new bolts. Its like 50 bucks more compared to just buying impeller alone. Kit is housing, impeller, wear plate, bolts, 2 - O rings. On Merc kits the o ring is already installed on the new black housing. Sierra kits do not install the new oring on the black housing.
Just buy the kits you are way better off - cost is under 100 bucks per kit.
Just buy the kits you are way better off - cost is under 100 bucks per kit.
Last edited by BUP; 12-15-2016 at 06:47 PM.
#26
Registered
![Default](/forums/images/icons/icon1.gif)
WOW Whoever designed that engine compartment should be ***** Slapped. Or better yet they should have to come change the pump and then get ***** slapped so they don't ever design anything like that again.
Chris
Chris
#28
Registered
![Default](/forums/images/icons/icon1.gif)
Its best to buy the kit - comes with even new bolts. Its like 50 bucks more compared to just buying impeller alone. Kit is housing, impeller, wear plate, bolts, 2 - O rings. On Merc kits the o ring is already installed on the new black housing. Sierra kits do not install the new oring on the black housing.
Just buy the kits you are way better off - cost is under 100 bucks per kit.
Just buy the kits you are way better off - cost is under 100 bucks per kit.
#29
Registered
Thread Starter
![Default](/forums/images/icons/icon1.gif)
You can do it without removing but you must get the tension off the belt. By the time you have the housing off there is nothing holding the pump
#30
Registered
![Default](/forums/images/icons/icon1.gif)
ya, a bit tricky with just the fuel lines attached. I would tie off the pump so it doesnt drop, then quickly get a bolt back in place to hold it... Is it messy to pull the rubber hose, the metal fuel line, and then the breather hose?