salt free flushing

[circle hook]

with the salt free flushing kit how would I flush my 1971 40HP you can't use ear muffs because of the type of water intake it has, I allways use a drum but this won't work for this Thanks Bob

 

[billy4hp]

Re: salt free flushing

I use Salt-a-Way (not the brand you mentioned) and on my kicker which cannot be ran on muffs I use 6oz of Salt-a-Way to 5 gallons of water in my run pail. Salt-a-Way is blue in color so I just watch for just a good stead flow of blue water coming from my tell tale and exhaust reliefs after the thermostat opens up.... Takes about 10 minutes or so...

Seems to work fine for me...

 

[circle hook]

Re: salt free flushing

Bill is this the same stuff sold in the I Boat store

 

[Chris1956]

Re: salt free flushing

Circle, That motor is 38 years old, and its aluminum alloy was designed to be resistant to the effects of salt water. You might consider not flushing it, since it is so difficult. What could it hurt at this point?

 

[circle hook]

Re: salt free flushing

it must of hade been cloged because I droped the lower unit and placed a hand drill on the drive shaft and the impeller did pump water, so then I placed a garden hose right on the water pick up tube with the lower unit still off and ran the engine she ran nice and cool, then I put the lower unit back on and now she runs cool on her oun in a drum, so I guess that dislodged what ever the blockage was, and is the older alummium different than the newer and when did they swith what year Thanks Bob

 

[circle hook]

Re: salt free flushing

P.S. do you know of any flushing adaptor for that style engine even if the prop has to be removed Thanks Bob

 

[Chris1956]

Re: salt free flushing

in the sixties, OMC did not recommend flushing. I do not know if there was an alloy change, however, it is quite likely.

Does that motor have a grating above the AV plate, on the side. If so, you may be able to use a standard flusher(with some minor mods) to force water into this port. You will need to tape up the water intake behind the prop, while flushing.

 

[billy4hp]

Re: salt free flushing

Bill is this the same stuff sold in the I Boat store

Circle Hook,

I could not find it in the Iboat store, but Salt-A-Way is pretty much the industry standard up here in the Pacific Northwest. I have used it on my 1972 9.5, 1978 Johnson 70 and 1990's Nissan 5hp.

What I try to accomplish when flushing the salt is keeping it from plugging passages. If anyone has had a boat in salt water knows, the salt builds up quickly when it dries and will plug thing up in a hurry if not kept in check. Eventually the layer of salt will hurt the cooling capacity of the engine by creating a thermal barrier. So you might have a good tell tale stream as the passages get smaller but not completely blocked as there is less area but the water won't be in direct contact with the "water jacket". This creates a overheat condition in a hurry, people around here fight it all the time. Particularly on kicker and dinghy engines that get infrequent use and are never flushed.

I am sure other products work just as well, if not better than what I use. Salt-A-Way is what everyone around here uses be it a dinghy motor on up to cleaning a heat exchanger from a Perkins pancake diesel from a 60' yacht... Worst case a good long flushing with plain old fresh water works fine as long as the salt has not had a long time to build up. I also use the Salt-A-Way to help cut down the salt when I wash down the boat and trailer.


JMHO,

 

[1946Zephyr]

Re: salt free flushing

Circle, That motor is 38 years old, and its aluminum alloy was designed to be resistant to the effects of salt water. You might consider not flushing it, since it is so difficult. What could it hurt at this point?

I beg to differ on that one. Leaving it unflushed is a bad move on any outboard, any year. Salt is horrible on any engine if it sits in the cooling jackets. It's also highly recemended to wash down the outside of the motor, because the salty air forms nice crystals all over your equipment and soon enough, the bolt heads start rusting, paints peels away.....and whatever else.
I've bought motors in the past, that sat without flushing and the corrosion caused from salt water use, completely closed up the water jackets where nothing could even pass. A huge mess

The best thing to do, is run it in a barrel for about 10 minutes or more until it gets good and warm. Some might think this is overkill, but it's good assurance to prolong the life of your 39 year old motor.