1992 Johnson 4 HP

[2K2AcuraTL]

I just was gifted a 1992 Johnson 4HP outboard from my F-I-Law, its in pretty good shape.. need a little clean-up here and there.. thinking there is less than 40 hours on it, and thats being VERY generous estimate...
Had original spark plugs - will be replaced shortly..
Looking for an owner manual.. its a long shot, I know...
Any input appreciated.
Cheers
J.

 

[FZ1]

I just was gifted a 1992 Johnson 4HP outboard from my F-I-Law, its in pretty good shape.. need a little clean-up here and there.. thinking there is less than 40 hours on it, and thats being VERY generous estimate...
Had original spark plugs - will be replaced shortly..
Looking for an owner manual.. its a long shot, I know...
Any input appreciated.
Cheers
J.

Check online for specs. Tcw-3 premium plus for motor oil at academy. Champion original spec plug: find compatible NGK plug runs better.

 

[Donald]

The carb will probably need cleaning and rebuilding. Do you have an ultrasonic cleaner?

 

[2K2AcuraTL]

Check online for specs. Tcw-3 premium plus for motor oil at academy. Champion original spec plug: find compatible NGK plug runs better.

agreed its a NGK 3579.. a little harder to find.. but the are out there...

 

[2K2AcuraTL]

The carb will probably need cleaning and rebuilding. Do you have an ultrasonic cleaner?

no I dont.. good suggestion... i will go that route if it runs like crap once i give it a test run this summer..
..first plan is to give it acl free - 91 oct fuel as a get go..

 

[RTexasF]

When you're sourcing spark plugs and other items look for a water pump kit.

 

[FZ1]

agreed its a NGK 3579.. a little harder to find.. but the are out there...

You will also need a mixing bottle available at academy. 50-1 mix ratio. Maybe Chevron with Techron would do a little cleaning.

 

[nwjones18]

Echo sentiments already given. Replace Impeller, change gear oil and rebuild the carb. Any TCW-3 oil should be fine I run pennzoil in my outboard that's $5 per qt at walmart. Should be a fun project. Champion or NGK plugs will both be fine as long as they're the correct ones. Run ethanol free fuel. Check out ebay for an owners or shop manual.

 

[2K2AcuraTL]

Indeed, gear oil will be done when it arrives at the lake.. all my watercraft gear and TCW-3 oil is up there.
Most local gas stations 91 is ethanol free.. Costco gas is eth free..

 

[2K2AcuraTL]

Oh.. speaking of oil... is this puppy a 50:1 or a 40:1..??
Thanks again
J.

 

[Warlord]

Almost certainly 50:1 but either will work fine.

 

[FZ1]

no I dont.. good suggestion... i will go that route if it runs like crap once i give it a test run this summer..
..first plan is to give it acl free - 91 oct fuel as a get go..

Right. Fresh gas mix and see if you can get it to fire before you do anything else. Clymer wrote a manual covering johnson/ evinrude small engines 2 to 70 horsepower. Buy used at half price books or ebay. Check the fuel filter if it won't run.

 

[JTK]

I wouldn't be surprised if the carb is just fine and it may only need a water pump impeller. I wouldn't touch the carb until I ran it.

Neat little engine to have on hand. Something like a little 4hp, 4-stroke Tohatsu would cost you like $1500 new today.

 

[2K2AcuraTL]

I wouldn't be surprised if the carb is just fine and it may only need a water pump impeller. I wouldn't touch the carb until I ran it.

Neat little engine to have on hand. Something like a little 4hp, 4-stroke Tohatsu would cost you like $1500 new today.

Indeed .. im hedging my bet that the carb is is alright... we shall wait and see..

 

[FastLane]

I would dribble some 2 stroke oil in the cylinder first and pull it through. Hose out the carb with carb cleaner. Fresh gas. Give her a pull and see how it runs. Probably needs nothing.

 

[wpod]

The two stoke outboard engines are cool.

 

[2K2AcuraTL]

I would dribble some 2 stroke oil in the cylinder first and pull it through. Hose out the carb with carb cleaner. Fresh gas. Give her a pull and see how it runs. Probably needs nothing.

good idea... the motor spins freely already.. took a look when the plugs were out.. some carbon build up.. so yes a good cleaner will be in order..

 

[2K2AcuraTL]

Hello again, can anyone tell me what this is..?? and what does it do..??
Cheers

 

[wag123]

Hello again, can anyone tell me what this is..?? and what does it do..??
Cheers

A sacrificial anode. All outboards have one. It counteracts corrosion.

 

[2K2AcuraTL]

A sacrificial anode. All outboards have one. It counteracts corrosion.

awesome Thank-you..!!