PSS Shaft Seal Cooling Line Connection – Cummins 6BT

[Tim Olson]

I have a single engine Cummins 6BT 5.9M 220 hp Trawler (new to me boat) that has a cooling line running from the gear cooler raw water drain hole to the PSS shaft seal. I’m not happy with the connection since it is below the water line and only has room for one small clamp on the clear vinyl hose. As far as I know the boat has operated like that for awhile.

questions:

Is having a cooling line a good idea? PSS says that the shaft seal only needs to be vented, not water cooled for boats that run under 12 knots which I’ll never reach.

As a minimum, I’d like to install a hose barb or something to increase the connection area if I keep the cooling line. <br />What are my options?

What is the size of the drain plug fitting on the  gear cooler?

Cummins part 3915159

Genuine Cummins Gear Oil Cooler – 4BT 150 & 6BT 210/220 Diamonds (3915159)

thanks!

 

Topic

[Tim Olson]

Thanks Tony. Your advice is much appreciated!<br /><br /><br />

[Tony Athens]

1/8″ NPT brass plug–Home Depot or equal..

[Tim Olson]

Thanks Tony!  I don’t have the original drain plug to the gear cooler.

Any idea where I can get a replacement or what the size of the fitting is? 

I’m willing to replace the whole gear cooler but hate to go that route just for a missing drain plug

[Tony Athens]

IMO, 100% not needed in your application. Run a new clear hose up to the ceiling for a vent. You’ll “see” your PSS has water.

[Author]

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