She's out!!!!

[iangrant]

Dragged out on the trolley this morning,

Antifouling going on, toilet seacock drifted out reground greased and working, all other seacock found and serviceable, allen bolts ordered for rope cutter stb side, toiled unblocked, schaled up non return valve,

third shot is the underwater exhaust.

Survey tomorrow, back in Friday, back home Saturday all being well!

Quick question, there are two small "exhaust" holes one either side which do emit exhaust and a small spray of water, is the small spray all it should be?

 

[jfm]

Quick question, there are two small "exhaust" holes one either side which do emit exhaust and a small spray of water, is the small spray all it should be?

You need to describe your exhaust arrangement in more detail becuase there are many variations.

All the spent engine raw cooling water is injected into the exhausts to cool them.

In some boats (Sq78 for example) there are "main" exhausts underwater and small "bypass" exhausts above water. Is this what you have? In this case most of the exhaust and spent cooling water will go out of the u/w exhaust and you'll only see a dribble out of the above-water exhausts

In (many) other boats there are only main exhausts, above water more common but sometimes underwater. If you had only above-water exhausts you would want to see more than a dribble of coolant - you'd see the full gushing flow from the raw water pumps

But I dunno how Haden is plumbed. Main exh below water, and bypass above? Or what?

 

[jimg]

Some boats have a tell-tale ( is that how you spell it? ) on each side so you can see the raw water cooling is working, there was an arrangement like that on Brooms that are also aft cabin boats.
I assumed that it was because it was hard to see the main exhausts over the stern and under the bathing platform?

 

[AustinPowers]

Sounds like the side exhausts are really there to tell the helmsman that the raw water cooling circuit in the exhausts is not blocked.

Think of them as tell tales and depending on their distance from the engines, there should be a steady flow at high revs maybe reducing to a dribble at tickover. Oh and don't be overly concerned if one spurts out more water than the other, its not necessarily a problem, rather one pipe might be a little longer or has to climb a greater gradient than the other before getting to the outlet.

Just use them as tell tales and you'll be fine.

 

[iangrant]

Chuffin great big 'uns underwater

But I dunno how Haden is plumbed. Main exh below water, and bypass above? Or what?[/QUOTE]



BIG stainless exhausts go into the hull under the water line and small take offs to just above the water line, about 2" diameter. It makes sense that these are by-pass and would "spit"

Thanks for the replies, still going to take spare impellors!!

Ian

 

[jfm]

still going to take spare impellors!!

Do indeed. And never store your spare impellers in the engine room if you are high-hours user. The heat of the engine room bakes the rubber, so when you come to use the impellers thay are useless: too hard to insert in the pumps. Store them somewhere room-temperature-ish

 

[iangrant]

Do indeed. And never store your spare impellers in the engine room if you are high-hours user. The heat of the engine room bakes the rubber, so when you come to use the impellers thay are useless: too hard to insert in the pumps. Store them somewhere room-temperature-ish

Good call, thank you, nice wee locker under aft cabin steps reserved for engine spares. Always careful with spare filters, stored onboard they can rust their faces in 10 seconds!

I saw on a boat in the engine room a short section of water pipe with a spanner sticking out, checked the size and oh yes it fitted the bleed nut, Top tip I thought!