Muffs and suction

[ralphy670]

If I place the muffs on my boat and run a small hose directly into a jug of rv antifreeze will it suck it in or is there not enough suction for this? I usually take all the hoses of the thermostat housing and dump rv through but it is very time consuming.

Thanks for any info.

 

[jay_merrill]

Re: Muffs and suction

Try it and see what happens. Since the fluid will come out of the motor, you will know if it is working or not. If you don't see fluid discharge quickly, stop. One other thought is to place the bucket of AF above the motor heinght, so that gravity flow assists in the effort.



???

 

[dsiekman]

Re: Muffs and suction

One other thought is to place the bucket of AF above the motor heinght, so that gravity flow assists in the effort.



???

If you try it, keep an eye on the hose. Make sure it doesn't collapse from the suction and cut off the flow. Also, I might try to modify the cap with a barb fitting and flip the bottle upside down. I would also mount it above the engine as per Jay's suggestion. This way you aren't counting on suction and you are taking full advantage of gravity. Think "IV drip".

 

[JimS123]

Re: Muffs and suction

The jug has to be higher than the engine. You need a minimum of 5 gallons to get the job done. Before you start, run the engine for 15 minutes on the garden hose to get it real hot and ensure the thermostat stays open. Don't use RV antifreeze...its made for the sink and toilet. You need marine antifreeze thats formulated to be in an engine block for extended periods of time.

They make a kit to do what you want. Includes a tank, hoses, valves, etc. I'm sure somebody else will chime in real soon - the experts here advise against doing that very thing becuse if you don't do it perfectly right you will leave some water behind and the block will crack.

 

[fat fanny]

Re: Muffs and suction

I do not want to discourage you from what you are attempting to do but if it's trying to winterize your block take my advice you have a 50 50 chance of it being effective. I tried this my 1st year as an I/O owner and in the sping I ended up with a cracked mani take my advice and just blow the water out trhough it;s passages and drain plugs with compressed air and fill it wia the thetmostat housing until it pours out every open passeage hoses then cap off, drain plugs then cap off, and up to the therm housing works everytime 12 years and counting.

 

[ziggy]

Re: Muffs and suction

fat fanny is on to it.

don't try any of them fancy ways of getting anti freeze into your cooling system. do it by the book. if it says introduce via the tstat housing, do it that way.

be sure all the water is out of the system prior to adding the anti freeze.

ya know, ya don't even need to add the anti freeze if all the water is out of the system. that is a satisfactory way for lay up. cause air don't freeze.

myself, i add anti freeze via the tstat housing after i remove all water from the system. only reason i do the anti freeze at all is for the corrosion protection. if it weren't for that, i'd do it with air.

 

[Bondo]

Re: Muffs and suction

Ayuh,.... Impeller pumps are flooded entry pump,...
They don't suck, at All... They have to be fed...

 

[lprizman]

Re: Muffs and suction

no
start over

 

[rwidman]

Re: Muffs and suction

..

ya know, ya don't even need to add the anti freeze if all the water is out of the system. that is a satisfactory way for lay up. cause air don't freeze.
.

That is how I did my boat after the warranty was over. It's important to read and follow the engine manufacturer's instructions for draining the block.

On mine (Volvo 5.0), I had to:

Remove a cap from a drain hose, hold it down and let it drain.
Remove a plug from each manifold and let them drain
Remove three hoses, hold them down, and let them drain

Once you learn how to do this you can extend your season by using the boat on nice days and draining the block if it's forecast to be near freezing at night.

 

[RicMic]

Re: Muffs and suction

Ayuh,.... Impeller pumps are flooded entry pump,...
They don't suck, at All... They have to be fed...

That is correct, these water pumps are centrifical pumps, they don't create any suction.

 

[This_lil_fishy]

Re: Muffs and suction

"Muffs and Suction"

Excuse me while I crawl back outta the gutter.

+1 on the draining the block. Do it properly and you have nothing to worry about. My manual says nothing about draining the power steering cooler, but many here recommend that as well, as sometimes water can be trapped in there.

Ian

 

[shrew]

Re: Muffs and suction

I bought a 'Winterization Kit" last year. I filled it with the purple propylene glycol and hooked the kit up to my muff's. I started the engine and eventually got a trickle coming out or the raw water exahust port. I immeidately shut down the engine becuase I feared that there didn't appear to be nearly enough volume to keep from burning out the impellor.

 

[rwidman]

Re: Muffs and suction

I bought a 'Winterization Kit" last year. I filled it with the purple propylene glycol and hooked the kit up to my muff's. I started the engine and eventually got a trickle coming out or the raw water exahust port. I immeidately shut down the engine becuase I feared that there didn't appear to be nearly enough volume to keep from burning out the impellor.

Did the instructions tell you to place the jug above the engine?

 

[H20Rat]

Re: Muffs and suction

nobody asked the obvious, but what are you trying to winterize?

If its an outboard, you are completely overthinking this! no need to do any of that...

 

[Jakebob]

Re: Muffs and suction

nobody asked the obvious, but what are you trying to winterize?

If its an outboard, you are completely overthinking this! no need to do any of that...

This is the info I was looking for when I found this thread. I've winterized I/Os before, but this is my first OB.

'74 Johnson 135. What should I do before the freeze comes? Make sure there's no water and fog carbs?

 

[32_d3gr33s]

Re: Muffs and suction

'74 Johnson 135. What should I do before the freeze comes? Make sure there's no water and fog carbs?

not to try and steal thread, but i have the same motor and was going to ask the same question. What exactly needs to be done to winterize it?

 

[QC]

Re: Muffs and suction

This a test of the emergency modulation system . . .

Let's let this thread die and remind all that this type of inquiry belongs in the related engine/motor/drive section. The OP has still not mentioned what engine we are trying to guide him/her with and Jake and 32 need to go hang in the JohhnyRude section