Johnson 6HP 1967-Flush kit?

[JANDREWB]

Is there a flush kit made for this motor?- ie. after use in saltwater. Water intake in in the exhaust area- seems unlikely for standard kits to work.

 

[F_R]

Re: Johnson 6HP 1967-Flush kit?

There used to be, but they are very rare. Some people fashion a plate with a hose adapter to go on where the rectangular plate is just above the anti-cavitation plate. You need a good supply of hose water because the bulk of it will just run out the main water intake screen....or figure out a way to block that off. Needless to say, you have to put the stock plate back on to use the motor.

 

[HighTrim]

Re: Johnson 6HP 1967-Flush kit?

Above the cavitation plate is a inlet plate held with two screws as FR stated. If you remove this plate, cut out a copy made of plain sheet metal, drill a 1/2" hole, and solder on a female garden hose connector, you will have a flushing attachment. This will work on any size motor that has this plate. Your other option is to look for the "Tempo" motor flusher that he spoke of. Sometimes on ebay, but as he says, rare as fanged chickens They look like this.

 

[jay_merrill]

Re: Johnson 6HP 1967-Flush kit?

There is an easier way.

Buy a standard, rectangular type set of muffs - the ones with the v-shaped rod that allows you to slip it onto the lower unit with the "water side" next to the intake, above the cavitation plate. As manufactured, it won't fit your six hp but you can cut the lower portion of the rubber muffs off with a hacksaw, along the longer dimension. Make sure that the side that you cut is the side that will face down, against the cavitation plate. Also, don't cut too high on the muffs because it will leak a lot of water out of the bottom, even though that side butts up against the cavitation plate. You may find that, if you let the hose fall to the ground, it will want to rotate the muffs. I just run a long bungee from the hose to something on the boat to keep the weight off of the hose/muff assembley.

 

[HighTrim]

Re: Johnson 6HP 1967-Flush kit?

Im not so sure about that idea. I believe the water loss would be too great, and you would not be able to maintain water pressure, since you have ruined the seal of the suction cup. I realize the muffs force feed the power head with cooling water anyways, but cutting the muffs is still a good way to fry your impeller. It may be ok for a quick fix, but not for maintainence work in the long haul.

 

[HighTrim]

Re: Johnson 6HP 1967-Flush kit?

Another option is simply a bucket such as this.

 

[jay_merrill]

Re: Johnson 6HP 1967-Flush kit?

It works fine. If you don't cut the muff too high, you will get some leakage but not enough to matter and there is still a lot of water going to the impeller. Remember that a 6hp isn't pumping a huge amount of water anyway and you are getting positive pressure from the hose, which forces water up into the pump housing.

This is one reason why I tell people never to use muffs to check a motor to see if it is "pumping" water. If you want to be sure, put the motor in a barrel and you will get a better picture because there is nothing helping the impellor.

 

[DJ]

Re: Johnson 6HP 1967-Flush kit?

Got to admit, a five gallon bucket is about as high tech as I get, for a six.

Running them in a bucket or barrel is much preferred. Outboards need backpressure to run properly.

I do use muffs, on my larger engines but that is for flushing only.

 

[JANDREWB]

Re: Johnson 6HP 1967-Flush kit?

Thanks to all of you for the advice. There are some good options for me to work with here. Amazed to see there is no shortage of practicality and ingenuity in the replies.