Volvo Penta exhaust riser

Blake0192

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Hello I have a 2003 Volvo Penta 3.0 I just put a different motor in my boat bc my motor was locked up. on this new motor I have a black hose off the exhaust riser that I didn’t have on my old motor can I just put a plug in it?
 

Scott Danforth

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What is the other end connected to?

Salt away is a tee in the raw water line, back to a glorified windshield washer reservoir. Doesn't look like a salt away / neutra salt installation
 

Blake0192

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What is the other end connected to?

Salt away is a tee in the raw water line, back to a glorified windshield washer reservoir. Doesn't look like a salt away / neutra salt installation
It wasn’t connected to anything I bought the motor from a guy I believe it was connected to the lower unit. I plugged it. Let it run for about 30 minutes. It seem to be doing fine.
 

dubs283

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Only time I've seen a line like that from the exhaust cooling passage is for a dripless propshaft packing on an inboard/v drive or a hot/cold raw water shower

It'd be best to abate the barb and hose and just plug the hole
 

Blake0192

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Only time I've seen a line like that from the exhaust cooling passage is for a dripless propshaft packing on an inboard/v drive or a hot/cold raw water shower

It'd be best to abate the barb and hose and just plug the hole
Thank you
 

ta79pr

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Page 463 of the Volvo Penta service manual shows the 98 model of the 3.0 has a hose to the riser from the thermostat block.
 

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Fun Times

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ta79pr

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To add to the puzzle, it appears Volvo was making some various configurations for the 3.0 during the 90s. Here is the color cooling diagram, shows a version of the hose from the riser but this time to the exhaust itself.
 

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ta79pr

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And then a version plumbed to the steering cooler (mechanical or power). Good luck, interested as to which is most correct for your application/swap.
 

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