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Old 04 September 2009, 14:08   #1
DGR
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Country: UK - Wales
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Boat name: Blue Marlin
Make: Ribcraft
Length: 7m +
Engine: Yanmar 315/Bravo 2X
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Ex RNLI Evinrude 70...

Does anyone have any experience of using these engines?

It has a stainless steel fitting on the side of the gearbox, which is used to provide water to the engines on the trailer to warm them up before launch - or flushing afterwards. The fitting looks to have broken off on the one we've got, and we want to blank it off, but don't know how the fitting is actually secured into the gearbox.

Anyone got any clues/ideas?!?

D...
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Old 04 September 2009, 15:22   #2
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it should just screw out / though it depends which side the engine was fitted to the boat as some were just into the normal flush hole ,,starboard side,, some others were drilled out and re threaded as the hose had to go on the other side of the engine ,think a few may have had a tube running around the leg but going into the original flush hole ,
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Old 04 September 2009, 18:04   #3
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Can't see it doing any harm leaving it open as it'll only draw water in.
Can you post a photo?
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Old 05 September 2009, 06:55   #4
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chewys right ,,when the crew releses the cooling hoses ,,and they only plug on ,,,hoses fall away on bungiee chord and the engine runs as normal when in the water
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Old 05 September 2009, 16:06   #5
DGR
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Country: UK - Wales
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Boat name: Blue Marlin
Make: Ribcraft
Length: 7m +
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MMSI: 235020218
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I thought that they were on some sort of QR fitting that sealed the pipe when disconnected. The hole in the leg/gearbox is above the cav plate so under normal running it will be out of the water and so will be 'sucking' air.

It's not obvious how it is secured - but I'll have another look at it and see whether it is tapped/threaded or if it is in one of the original cooling holes.

Cheers!!

Dylan...
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Old 05 September 2009, 17:40   #6
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The RNLI fitted these just above the cav plate, the pipes pushed on and water was fed from tanks mounted on the carriage.
Once the boat was in the water the normal intakes would suck water in, the boat put in gear and the pipes would slide off the stainless fittings. No fancy QR fittings were or are used.

The engines run fine using the pipes and tanks and don't suck water in through the normal intake so it stands to reason that the additional intake won't suck water in when water is been fed from the normal intakes.

Hope it all makes some sense?
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