dripless seal installation problem

P

PJ

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396
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In the installation of the dripless seals, a critcal, in my opinion, and much needed lower zinc was removed from the after cooler. This lower zinc was removed to install the water line to the dripless seals. In my discussion with the boat yard that did the install, they said this was standard practice. In my opinion I think it should be the top zinc because it never seems to go bad. what do you all think?

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The water line for my dripless seals comes off the riser block between the exhaust manifold and the elbow.
 
Ours come off the impeller pump (450 cummins) I would be concerned about your hook -up becoming clogged?
 
I'd guess they are worried about slow speed and having enough water to push out the seal's open end. We have T fittings in the water line to the shower heads on each engine and a cross over between the seals. No zincs removed!
 
Just not right. That lower zinc is the most important because it is the only one always in the water when the engine is stopped.

The prop seal will be in the erosion path. The top zinc gets the least erosion by far in my engines because it is only wet when running but depending on how low your engines are it may also stay wet.
 
just got off the phone with the yard they are going to move the line next week. They will not remove a zinc to place the line.
 
it looks like you've got a cummins b/c series. check the bottom of the transmission cooler for a 1/4" threaded plug. you can remove that and use it for feeding the dripless. you can also look at your wet elbow for a drain plug on the bottom and use that for the feed. it will serve as a gravity drain for the elbow as well.

you are correct that the zinc should/needs to be there and should replace it.
 
A much better spot is the 1/4 pipe plug on the output side of the raw water pump.
 
Similar to that as indicated by Vic, mine feeds off the wet elbow (drain plug on the riser block).
Drains the elbow after shut down.
 
Have the yard add a second clamp to that raw water line while they are moving things around. I've never been a fan of that brand of hose for raw water service, the burst strength is barely sufficient.
 
quote:
Originally posted by captddis

A much better spot is the 1/4 pipe plug on the output side of the raw water pump.

Click to expand...


+1 This is where mine are on Cummins B series. Installed one year ago and still loving them.
 
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