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Old 27 March 2012, 01:53   #1
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Flushing through motor

I have a 30hp 2 stroke and wondering if flushing through with gravity fed water from a 20L container would suffice. The motor would be on its stand and the container would probably be on top of the car linked to the ear muffs by hose pipe. This would be done straight after coming out of the sea.
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Old 27 March 2012, 02:47   #2
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Quote:
Originally Posted by rich hand
I have a 30hp 2 stroke and wondering if flushing through with gravity fed water from a 20L container would suffice. The motor would be on its stand and the container would probably be on top of the car linked to the ear muffs by hose pipe. This would be done straight after coming out of the sea.
Don't see why not ,Atlantic class lifeboats use a similar idea for warm up whilst on the trailer going from boat house down to the waters edge,
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Old 27 March 2012, 03:48   #3
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I would geuess your biggest issue might be getting enough water up there to be meaninfgful, especicially as flush muffs are notorioulsly bad at sealing on the leg.....

I've never worked out how much watetr you would actually need, but having run a small jetwash form a 5 gallon container in a similar scenario I would guess more than you might want to lift up there......
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Old 27 March 2012, 04:19   #4
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Would a 20 litre container of the right shape not be just about big enough to sit the leg/prop into and then flush in the normal manner?
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Old 27 March 2012, 05:40   #5
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Bear in mind a cold tap usually chucks out 30-40L a minute, I don't think 20L is going to last long or if it does the water pump might not like it?

We have a low pressure supply at our house (about 0.5 bar / 5m head from supply tank) and I found it completely useless for muffs, its fine with the E-TEC inlet adaptor which only needs low pressure and isn't losing water, but I'd be worried about doing something unpleasant to the water pump due to lack of water actually getting to it.
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Old 27 March 2012, 06:28   #6
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Many variables. I suppose the best way would be to get a small barrel with a large screw lid to stop water leaking whilst in the back of the car. I probably would have to carry the fresh water with me you see.

When flushing by way of mains tap water and hose connected to ear muffs how long is the motor best run for? The other way would be to simply test my original idea and see how much water is pump through and how long the container lasts.
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Old 27 March 2012, 07:48   #7
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I run mine with double ear muffs off the tap for about 5 mins, and all has been well so far ,

While we are on this topic tho, it occurs to me, if you are moored at sea, and don't use the engine for a week or so, what risk is there in creating a build up of salt?
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Old 27 March 2012, 08:30   #8
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Quote:
Originally Posted by m chappelow View Post
Don't see why not ,Atlantic class lifeboats use a similar idea for warm up whilst on the trailer going from boat house down to the waters edge,
Got a picture of the said idea? Would be interesting to see....
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Old 27 March 2012, 08:49   #9
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When flushing by way of mains tap water and hose connected to ear muffs how long is the motor best run for?
Here there be many discussions.....

Most would agree at least long enough for it to warm up & open the thermostat. Which instantly opens up a huuuuge volume of water passages inside the head that the hose might not be able to keep up with, and how do you know when that has happened?
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Old 27 March 2012, 15:01   #10
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Got a picture of the said idea? Would be interesting to see....
Ive not actually but just imagine a container of water sat on top of a car with a hose leading to the motor down below, nothing else to it im afraid. This gravity fed system will provide far less water flow than a mains fed tap.
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