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      Fishing Minnesota had added a new menu item (see above) called Fishing Report Clubs. It's a way to keep the really good fishing reports coming and being shared only with those who also provide detailed fishing reports. We will only approve new members who request to join if they have already posted a recent fishing report in the area forum, associated with the Fishing Report Club area  you want to join. We are going to limit the number of regular memberships, in the Fishing Report Clubs, to the top 20  members in each Club, to those with the best frequency and quality fishing reports provided in the club and less so in the regular fishing report forum open to all members. The higher quality fishing report reserved for the club of course. If  you want fishing reports  around your area, I would Join Now, some of the clubs are starting to fill fast. Use the Fishing Reports Club link in the Menu above (after you've posted a fishing report in the regular area forum) and request to Join.
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Hookmaster

Help with running a motor that's sat for 4 years

Question

Hookmaster

I have a 1985 25hp Johnson motor that hasn't been run in 4 years. It was winterized before this long hiatus. I plan to use it this fall. What are the steps to best ensure that I can get it running? I have never decarbonized this motor, is this something I should include in the process?

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Surface Tension

At the time that outboard was made the recommend oil/gas ratio was 100:1. Thats been revised to 50:1.

Heres what I'd do if it were mine. Change the impeller, new spark plugs and drain and replace the gear oil.

After running it you may find out she runs like a top and all you need to do is the normal maintenance. Or you might find out the carb is dirty and it'll need to be cleaned and the lower unit is leaking oil or water into the oil.

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IFallsRon

I'd spray some oil into the cylinders to ensure you have lubrication and compression.

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eurolarva

Wait to do the decarb and new plugs until motor is running good. It will be one less concern if motor gives you any grief on start up. I would run the first couple gallons of gas 24 to 1 like a new motor break in then go to 50 to 1. When you do the decarb Seafoam Deep Creep in a spray can is awsome stuff. After you decarb then put on new plugs.

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Hookmaster

I got it running on the muffs yesterday. I flooded it which usually doesn't happen. I almost gave up but after about 25 pulls (I got my workout in), she fired up and ran great. I'll get it on the lake some night this week. Anybody have a recipe for decarbonizing or shouldn't I even do it if it is running well?

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countryboy9799

If it run's well I would leave it alone. Sometimes messing around will get yourself in more trouble. Unless you know there is a problem.

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eurolarva

Run it a couple of outings to verify it is running good. Buy a can of seafoam deep creep and warm the motor up. With cowling off slowly keep spraying the deep creep in till motor starts to stall and quit spraying till rpms come up. Keep doin g this till about 1/4 can is sprayed in. Then take the plugs out and nuke them with deep creep and put the plugs back in. Wait over night or a couple of hours then run the motor hard till it quits smoking. Plan on replacing plugs afterwards.

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Hookmaster

I ran it last night. It was like it was never in storage. I'll change the lower unit lube and put in new plugs and away I go.

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iffwalleyes

The older Johnsons were a pretty dependable motor. Seems like you could abuse them much more than the newer motors. My dad had a 9.5 HP Johnson that hadn't been started for about 6 years till this spring. Dad told me I bet it will start in 2 pulls. I said no way I will have to do a carb job and all kinds of stuff to it but I decided to try starting it first. It fired off on 3 pulls. Idled a little rough so I added some OMC engine tune and new plugs and it runs a good as it ever did. I had to call dad and say you know you were way off it took 3 pulls not 2 grin.gif.

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lawdog

congrats you are lucky.

I'd still run a can of sea-foam through the first tank of gas to help clean it up a bit and you better just watch it so no gunk gets loose and bogs it down for a while...

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Hookmaster

Seafoam's already in it!

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