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Old 10 March 2012, 13:23   #1
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engine flushing

this may sound like an odd question but is there anything you can add to the water when flushing an engine to help clean the waterways.
i have just had the open the waterways on my newly acquired yamaha and it is clear to see how important it is to flush after using in sea water.
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Old 10 March 2012, 13:28   #2
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Google Salt Away. Or use a weak acid (white vinegar as an additive comes to mind.)

jky
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Old 10 March 2012, 14:50   #3
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soap powder - my marine engineer recommended..
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Old 10 March 2012, 15:03   #4
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Anyone know where to get some Salt Away in the UK? Looks quite good!
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Old 10 March 2012, 19:01   #5
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soap powder - my marine engineer recommended..
Really you sure
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Old 10 March 2012, 19:02   #6
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soap powder - my marine engineer recommended..
Is that not going to cause loads of bubbles
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Old 10 March 2012, 19:09   #7
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soap power - as in washing machine power it's not that bubble - unlike I use a squirt if fairy lol
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Old 10 March 2012, 19:15   #8
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Never mind this soap... Where can I get my hands on this Salt Away!
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Old 10 March 2012, 19:22   #9
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the active ingredient I believe is sulphamic acid...

regards

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Old 11 March 2012, 05:05   #10
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On the subject of flushing an engine, presumably the flushing water can only get round the entire coolant system if the thermostat opens.If you are pumping cold water into the engine, presumably the thermostat will stay closed?
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Old 11 March 2012, 17:23   #11
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If you going to use an additive you'd be better to run it up to working tempreture or to get the thermostat open in a tank ,barrel or if on a mooring with a waterproof bag slipped over the leg,
My old man used to flush his through with car antifreeze as long as it had the anti corrosion stuff added ..or domestic heating/radiator additive.
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Old 11 March 2012, 17:29   #12
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What happens to the hundreds of outboards that never get flushed? I see loads.

I plug the hose onto the back of then engine to flush it as it has a connector, always wondered if it flushed it properly.
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Old 11 March 2012, 19:12   #13
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What happens to the hundreds of outboards that never get flushed? I see loads.

I plug the hose onto the back of then engine to flush it as it has a connector, always wondered if it flushed it properly.
You'll soon see when you come to replace the impeller - the state of the impeller housing is a good indicator.
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Old 12 March 2012, 20:00   #14
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What happens to the hundreds of outboards that never get flushed? I see loads.

I plug the hose onto the back of then engine to flush it as it has a connector, always wondered if it flushed it properly.
just changed the impeller in my Yamaha and still no water so i opened up the water ways and there was a consideral ammount of salt in there but not completely blocked but im thinking it was enough to causes my issue.
i should have taken pics
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Old 13 March 2012, 02:33   #15
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some outboards have a fine jet fitted to the end of the telltale - these can be prone to getting blocked by even a small piece of grit or salt. if it has one then flick the end off and have a look.
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Old 13 March 2012, 05:21   #16
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some outboards have a fine jet fitted to the end of the telltale - these can be prone to getting blocked by even a small piece of grit or salt. if it has one then flick the end off and have a look.
Yep mine (Suzi DF70) has a fine jet for the telltale which is susceptible to blocking so no telltale doesn't necessarily mean no water circulation - but I keep a piece of wire handy to unblock the telltale exit with.
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Old 13 March 2012, 07:18   #17
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