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Old 03 July 2008, 15:50   #1
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Flushing question

This may be a silly question but I'll ask it anyway.

So far I've always flushed my Suzi 200EFI using a set of muffs, but have always worried about the fit, and how much water was getting through the engine, although the tell tale was always very strong so can't have been too bad.

The engine does however have a std hose connection on the side of the engine tray that I tried flushing it with over the weekend.
Obviously all the water now goes in the engine and doesn't escape like it does around the sides of the muffs.
But, even without the engine running the tell tale was quite strong and didn't appear to pick up at all when actually running the engine.

My question is - does the water pump receive water when using the hose connection at the top of the engine, or is this meant for flushing without the engine running?
I suppose I could have now wrecked the impellor I fitted at the end of last season by running it this way.

Any views or knowledgable comments?

Nasher.
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Old 03 July 2008, 17:11   #2
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Generally, you do not run the engine when using the hose connection. The purpose of using muffs and running it through the water pump is to get circulation from the lower unit up through the head.

If you're running the water directly into the water jacket in the head (which is the hose connection just under the powerhead), you do not need the impeller to pump the water around, as you're already pumping it there anyway.

That said, there is a video on the Suzuki website that shows the guy running while on the hose attachment, but one that screws into the lower unit (usually smaller engines have these - my Honda 40 did.) Apparently they don't think it'll do any harm.


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Old 03 July 2008, 18:17   #3
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Quote:
Originally Posted by Nasher View Post
My question is - does the water pump receive water when using the hose connection at the top of the engine, or is this meant for flushing without the engine running?
I suppose I could have now wrecked the impellor I fitted at the end of last season by running it this way.

Any views or knowledgable comments?

Nasher.
As far as I'm aware youre right, The hose connection on the side of the motor is just for flushing the salt water from the power head. You musn't run the engine using this method as you will **** the impellor!
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Old 03 July 2008, 19:00   #4
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just checked through my tohatsu operators manual and it says , remove plug ,attach flushing hose in , turn on water and then run engine on tickover but then to stop the engine before turning off water , so you may be ok .
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Old 03 July 2008, 19:05   #5
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Mmm, thanks all.

Was afraid of that. its probably f***ed then.

I realised afterwards exactly what I'd done, just didn't think at the time.

I'll go back to the muffs and see if it pumps, but I'll probably change the impellor anyway, its only a 15min job.

I suppose another observation is that using the flushing port won't flush salt water out of the pump housing and lower unit, so doesn't do such a good job as a set of muffs.

A 40HP Suzuki had one of the attachments that screwed into the lower leg, it worked well.

Oh, and its far too late at night for me to think up something comical about sticking hoses in lower holes rather than head holes

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Originally Posted by m chappelow View Post
just checked through my tohatsu operators manual and it says , remove plug ,attach flushing hose in , turn on water and then run engine on tickover but then to stop the engine before turning off water , so you may be ok .
Ah, the other side of the coin.
I'd better ask a Suzi dealer tomorrow whats recommended.
Thanks all.

Nasher.
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Old 03 July 2008, 19:19   #6
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Personally I'd flush it on muffs as well. As far as I know flushing via a powerhead hose attachment doesn't flush the water pickup tube from the lower unit very well.Having brackish water sitting in there isn't a particularly good idea.
It'll still get some water to the impeller to lubricate it so you're probably OK this once. Worth dropping the L/U to check it though.

<edit> beat me to it while I was making a brew in the middle of posting
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Old 03 July 2008, 19:22   #7
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if i remember right the rnli atlantic lifeboats use the flushing hose system when they launch ,the engines are started and warmed up sometimes long before the boat reaches the water ,cooling water beeing fed from tanks on each side of the trailor and the hoses fit into the flushing hole on the outboard engines when the boat drives off the trailor the hoses just pull out .
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Old 04 July 2008, 05:54   #8
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I would advise against running the engine when on the hose. Although my suzy dealer said it wouldn't be a majorn concern, I'd be worried about lack of lubrication to the impellor.
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Old 04 July 2008, 08:01   #9
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I always use a large bucket and drop it in
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Old 04 July 2008, 08:39   #10
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I always use a large bucket and drop it in
Where did you find a bucket that big? I'd far rather do it that way but can't find one big enough for my lower unit.
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