Old Evinrude and Johnson

[moser42]

I have 1960-1962 Johnson 3hp and Evinrude 3hp outboards. How do you clean the gas tanks? They are mounted on the motor so I take them off and what do I clean them with? The carbs get clogged up with dirt every ride and I'm tired of cleaning them everytime so I want to clean the tank and hopefully this helps.

Thanks in advance!

 

[JB]

Re: Old Evinrude and Johnson

Howdy, Moser.

Welcome to iboats.

If crud is getting into the carbs the filters on the outlets from the tanks must be history. Be sure to replace them after rinsing and flushing the tanks.

If there is a lot of varnish built up in the tanks I suggest using a small amount of liquid (not gel) paint remover followed with a thorough rinsing with soapy hot water, clean water and about half an hour in a 150* oven.

I don't think I need to caution you about not getting any paint remover on the exterior of the tanks.

 

[moser42]

Re: Old Evinrude and Johnson

JB, thanks for the help.

I have changed the filters a few times. These motors have not been run in a long time. The evinrude was in the shed at my camp for who knows how long and the johnson was my grandpa's and hadn't been run in 20-25 years. When I first got them, I drained the gas tank and filled with new gas/oil mix. Then cleaned the carbs, and changed the gear oil. 2 pulls and they fired up! as I said earlier, the carbs would start clogging up and the motors would eventually stall.

sorry for rambling on there...So basically i put a small amount of liquid paint remover, then add soapy hot water, then add clean water. and with all of those liquids in the tank I put the tank in the oven at 150*celcius for a half hour?

After that I just dump it all out and put gas/oil mix in it and go!?

Thanks alot for the help JB

 

[DHPMARINE]

Re: Old Evinrude and Johnson

Don't these tanks have a ceramic type filter buit into the fuel outlet shut off valve ?I thought not much gets past them.Also they used to be expensive to replace.

DHP

 

[tashasdaddy]

Re: Old Evinrude and Johnson

moser i think what JB ment was use paint remover, empty, soapy water, empty, several times, then rinse clean water, several times. then put in the oven to dry.

http://www.iboats.com/bbboard/bbBoard.cgi?a=viewthread;fid=28;gtid=818798;gpid=818802

 

[steelespike]

Re: Old Evinrude and Johnson

If you have gummed up gas deposits you may need the
paint remover or laquer thinner.But if they are just cruddy you might try Hot water and dish washer soap.
Put in a short piece of jack chain (small chain w 1/2 inch flat links)Shake it up good.As described rinse well and dry.

 

[moser42]

Re: Old Evinrude and Johnson

The tanks have gummed up gas deposits and are cruddy. There is still ice on the lake so I have some time to clean them.

If one of the bolts that holds the head on is stripped does that mean I will lose compression. All of the other bolts are still good and tight but one is stripped so i screwed it in as best i could.The gasket is still good too so do you think I will have a problem with the one bolt?
Also, how often should I be changing the gear oil behind the prop?
I really like these motors and want to keep them running forever!

Thanks alot for your help!

 

[Scaaty]

Re: Old Evinrude and Johnson

Pull the tank. Take out the petcock. Cut off the crudded up screen (pretty sure 60's still have fine screens DHP). Spray the living bejezzus out of the petcock with carb cleaner (fill it and let it sit overnight). Rinse, repeat.
. Get a new hunk of 1/4 gas hose. Put in a cheap inline filter...replace as needed. Clear plastic lawn mower filter will work fine, and you can also see if gas is flowing. Been there, done that, have 3 3hp in my possession now that run fine now that they get gas..

 

[F_R]

Re: Old Evinrude and Johnson

The gasket is bound to leak with one bolt missing. That amounts to one half the circumference of the cylinder. Take it to an automotive machine shop and have them put a Heli-Coil in the stripped threads hole. Then you can use the original size bolt.

 

[Texasmark]

Re: Old Evinrude and Johnson

If flammability is a concern you can do as the old farm tractor restorer's do. They go to the grocery store and get regular 5% acidic household vinegar and pour it in full. Let it sit for as long as it takes. Periodic sloshing helps. Then do the rest of the soap and bake recommended.

Mark

 

[JB]

Re: Old Evinrude and Johnson

". . .put the tank in the oven at 150*celcius for a half hour?"

NO!! 150* Farenheit. 150*C will burn the paint.

 

[tmcalavy]

Re: Old Evinrude and Johnson

Good advice on the oven temp for drying. I always finish my tank clean-outs with some 90 octane alcohol (rubbing) to get the water from the last rinse to evaporate. You can also swap the metal fuel line for rubber and install a small filter inline to prevent future problems. The cowls should cover this if you are worried about correct appearance...if the cowls are present.

 

[itstippy]

Re: Old Evinrude and Johnson

Do not run that motor until you get the head bolt problem fixed. You risk seriously damaging the cylinder (and thus ruining the motor) through water intrusion and other nastiness. It is designed to have ALL the headbolts solidly torqued down to spec.

Change the lower gearcase oil every season. This allows you to check for water in the oil, and gives you confidence that all is well with the gearcase. I use new plastic washers each time. They're about $0.50 apiece at the boat store.

Have you changed the rubber water pump impellers? They need replacing every few seasons as the rubber gets old and unflexible. Old inflexible impellers will not pump enough cooling water and may chunk up and clog the cooling passages. The motor will run hot and you can permanently, fatally damage it. New impellers are available everywhere for the old 3HP's, including here on iBoats.

Those motors are gems. Everyone that knows outboard motors wants one. Treat them well and your grandkids will be using them years from now. They do need the proper oil mix and preventive maintenance, though. Enjoy!

 

[byacey]

Re: Old Evinrude and Johnson

For really cruddy tanks, throw a cup of pea gravel in with the paint thinner or varsol and slosh around really well, the gravel helps loosen up residue in the tank.

 

[moser42]

Re: Old Evinrude and Johnson

Yeah I changed the impellers on both motors. The Johnson wasnt pumping water when I first got it so I took all of it apart and finally found that sea weed was blocking a cooling passage.
150 Farenheit' sounnds alot better haha. What is pea gravel, reallly small sandy gravel?

Can anyone tell me what year this motor is?
Johnson 3hp - Model No. -> Jw-19M
Serial No. -> C418761
I can't find the Serial or Model No.'s on the evinrude. I know its a 3.3hp and its a Yatchwin, the tank is white and the rest of the motor is navy blueish, if that helps.
I also noticed the Johnson has a 2-blade prop and the Evinrude has a 3-blade prop. I wonder whyy?

Thanks alot!

 

[JB]

Re: Old Evinrude and Johnson

JW-19 is a 1964, moser. Even though OMC said 50:1 fuel mix for '64 and later, most of the old salts say stay with 24:1 up to about 1970 for the JWs. That goes for the 'Rude, too.

Two blade (called weedless) props were for small, light boats. The three blade was for sailboat and kicker applications. That's why it was called a Yacht Twin.

itstippy is spot on. Those are the best small outboards ever made and we all want one. . . .or several.

 

[moser42]

Re: Old Evinrude and Johnson

haha yeah I'm very lucky to have found these amazing little motors. All I have to do is clean the gas tanks, possibly clean the carbs again, and fix the bolt on the head of the johnson. After that is done they should both be running perfect! 8)
I love how they don't have neutral or reverse and they spin 360degrees.

Is it bad to run these motors at full speed, how long does it take for them to warm up? I normally just run them at half throttle or slower with occasional full throttle shots to blow the carbon out.

So I should be running 24:1, If i have 10 litres of gas, how much oil should be added to get a 24:1 ratio?
Is there any other preventative maintenance that hasnt already been said?

Thanks alot for the help everyone, as soon as the ice is gone I will post some pics and videos of the motors running!

 

[JB]

Re: Old Evinrude and Johnson

For 10 liters of gasoline Use 400 ML of TC-W3 oil, moser.

 

[Texasmark]

Re: Old Evinrude and Johnson

Pea gravel is the size of English Peas, half a centimeter or less in diameter, but not sand.

Be careful putting things in there if there is an exit fuel strainer. My son put steel balls (2 cm in dia) in his farm tractor tank thinking he would do the same thing and in rolling around they broke the exit fuel strainer off.....$45 for a new one.

Mark

 

[moser42]

Re: Old Evinrude and Johnson

Where can I get pea gravel.
What is an exit fuel strainer? These motors have fuel valves to turnt he gas on or off if thats what you mean.

Thanks.