A little lesson learned from last cruising season that I just remembered which I thought might be useful to others:
You can replace the front seal (water side) on an Volvo
pump (actually a Johnson pump...so this probably applies to other engines too) without removing the raw water pump
In the past, when seals
on a raw water
pump started weeping water (or oil) I always pulled the pump and rebuilt it. This is probably the best practice, but if pressed for time this tactic provides a quicker, easier fix.
Last season I noticed the raw water
pump on my starboard engine
weeping a bit of water (through the weep slot designed into the pump for this purpose), indicating it was time to replace the seal. I was a bit short on time (we were actually underway), thought about it for a minute, and realized I could probably replace this seal without removing the pump by removing the impeller plate and impeller. Sure nuf, opened it up, used a hooked pick to remove the old seal, and pressed in the new seal (I have a tool which I built from properly sized PVC to do this). Only took about 15 minutes.
Of course, if the other seal is leaking (on the oil
side), its time to strip the pump and rebuild