1962 28hp Johnson

[fatjack07]

I have a 1962 28 hp Johnson outboard and I am preparing it for the summer use. I bought it at the end of last summer and did not have a chance to use it until now. When I bought it the previous owner and myself were able to get it running for about a minute and then hit the kill switch to turn it off. After we killed it we coud not get it started again. I tried a few more times that same week and was unable to get it started.

About a month ago I brought it to a local marine and they would not work on it because it was a 1962. They said it was too much of a liability if they broke anything. So I just recharged the battery and hooked it up, choked it and it started up. I then filled the tank with new gas and oil and started it again and let it run for around 20 minutes. It was running well then after the 20 minutes the idle became real rough and it sound as if it was going to stall out at any time. After a few minutes of running like that it did stall out. It started right back up after it stalled out but it was still running rough. I tried to play with the low and high speed knobs going from rich to lean but I am not sure where they should be at. After a few more tries I could not get it to start back up. I am extremely new to outboard motors and have no idea what to do to get this motor running well. I figure it is a pretty good sign that I was able to get it running today for an extended period of time but I am looking for some help.

Is there any ideas why this motor started and ran for some time and then stalled out and won't start back up? Where should I place the low speed and high speed, more rich or more lean? ANy help or advice will be greatly apppreciated.

 

[iwombat]

Re: 1962 28hp Johnson

Sounds like it may have overheated. Did you check the temp while it was running?

 

[fatjack07]

Re: 1962 28hp Johnson

no I am not sure how to check the temp, but I was using ears and running water while I had it running. Could it still overheat while I was using the ears?

 

[tashasdaddy]

Re: 1962 28hp Johnson

very easily. you need to change the impeller, (waterpump) in the lower unit. parts are available at laingsoutboards.com and ishopmarine.com. possible at the iboats store. here's more info http://forums.iboats.com/showthread.php?t=158086 wombat and i were typing at the same time.

 

[iwombat]

Re: 1962 28hp Johnson

Just because you had water pressure on the intake doesn't mean it got pumped through. Did the paint on the powerhead discolour at all?

If you don't have a temp gage the hand test is reasonable. If you can hold your hand on the powerhead for a second or two before it gets too hot to hold you're in the right range. Too hot to touch at all and you've got problems.

If it's been sitting for awhile with no idea what maintenance was performed - I'd be replacing the water pump and thermostat w/o even thinking about it.

 

[iwombat]

Re: 1962 28hp Johnson

Also (and someone correct me if I'm wrong) this motor takes a 24:1 fuel-to-oil mix.


And, while I'm on fuel, did you vent the gas tank?

 

[fatjack07]

Re: 1962 28hp Johnson

ok, I did not have the gas tank vented so I just when and did that. There was water being pumped through the motor because while it was running it was shooting out the rear toward the top of the motor (I do not know what this is called?) Could the water pump still be bad even if it it pumped water through?

I also noticed that the water that was on the ground after being run through the motor appeared to have some oil or gas in it.

 

[F_R]

Re: 1962 28hp Johnson

The fact that water was coming out the discharge means that it is going through the cooling system. It doesn't prove much about the water pump when running on the hose, because hose pressure will force water through even a bad pump.

Now, having beat that theory to death, here is another one. You have bad coils. It's a classic case. Those old OMC motors are notorious for that problem. And your response is typical too, ie playing with the needle valves which doesn't help.

You need to get the flywheel off and take a look. Bet the coils are cracked. They sell new coils here at iboats.

 

[fatjack07]

Re: 1962 28hp Johnson

how much are new coils and how difficult are they to replace. Are these the normal signs of bad coils?

 

[iwombat]

Re: 1962 28hp Johnson

The coils are cheap and real easy to replace. The hardest part is pulling the flywheel. But, before we get into that . . .

If you're going to own an older motor like this you really ought to go get yourself a shop manual. You can find them on e-bay sometimes, other times at your local library, and you can get new ones from ken cook (http://www.kencook.com/evinrudejohnsonmanuals/index.cfm?fuseaction=home.main)

Worth their weight in gold.

 

[tashasdaddy]

Re: 1962 28hp Johnson

i have a 1958 35 hp and have had other 50's motors, never touch them without the manual. there is a proper procedure for pulling the fly wheel, you need a harmonic balancer puller. and #8 1/4 x 20 bolts to thread into the flywheel, if you use standard, they will strip and leave the threads in the flywheel complicating matter even worse. they are simple motors to work on if you have the guide.

 

[iwombat]

Re: 1962 28hp Johnson

So . . . putting this all in a nice little summary.


The non-vented gas tank probably why it quit running after 20 minutes. (could still be an overheat, but sounds like not - good thing).

The coils on these guys are certainly worth checking and replacing if suspect. You might just consider doing points and condenser while you're in there. Probably well under $50 for all that.

If you don't know when it was last done, impeller and t-stats. Again, pretty cheap stuff.

You should be able to get all that right here on iboats, I'd imagine.

Get yourself a shop manual so you've got a guide to work from, and ask any questions along the way right here.


There's still at least a 50/50 chance you'll need to do a carb rebuild - they don't take well to sitting. Carb kits are cheap too, but you may not need it. So, save it until you can get it running reliably.

 

[BoatBuoy]

Re: 1962 28hp Johnson

The '62 28hp doesn't have a thermostat.

EDIT: The Johnson Service Manual from kencook.com covers your engine(RX-10) as well as others from 1924 to 1964. It's also occasionally sold on ebay for about $10 on CD by the seller willow.bay which is a name used by www.frontier-trading.com. The CD is identical to the more expensive paper copy.

 

[tashasdaddy]

Re: 1962 28hp Johnson

i did the coils, point, condenser, plug wires, carb, impeller for $130.00 including shipping, on the 35, your probably uses the same parts. http://www.laingsoutboards.com/newp...ncludes Gale, Sea King up to 1963, and others

 

[iwombat]

Re: 1962 28hp Johnson

The '62 28hp doesn't have a thermostat.

Hee-haw.


Thanks for the correction.