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In Your Cart:


Proper preparation for periods of extended storage of your outboard requires a comprehensive look at the entire boat/motor/trailer package. Of course, if you just have a small "kicker" that you use on a cartopper, the only thing you have to deal with is the motor itself!

Gather the following items, along with your boat, fuel tank filled, in an area where you can run the motor on your "flush" attachment.

Applicator containers of: storage "fogging" oil, fuel stabilizer like Sta-Bil or OMC 2+4, anti-corrosion spray, and a good spray lube product like LPS2 or OMC 6 in 1. A trailer jack. Your toolbox.

Proceed as follows. First, add some fuel stabilizer to the gas in the recommended amount. In fact, the best thing to do is add it before you fill up the tank! Why fill the tank? (After all, its gonna sit - right?) This will prevent a couple of unpleasant things from happening. Condensation. And oxidation and subsequent spoilage. I hope you can get undoped gas - oxygenated and gasohol Fuels are a NO-NO! if you cannot get anything else, you must COMPLETELY drain ALL the fuel system. And I mean AAALLLL. The lines, the VRO on OMC motors, the whole monkey. This stuffs deadly. Start the motor on the flush, run it up to warm and to ensure that the treated fuel gets in to the whole system. Apply the fogging oil to the carburetors equally - some motors have a fitting you can apply this thru, most you will have to look around for openings to shoot the stuff through, maybe even remove the silencer cover. You'll get lotsa' smoke. Great. So disconnect the line and run the motor out of gas at IDLE. Keep fogging. Note OMC motors with VRO system you will have to shut it off and drain the carbs manually or depend on the stabilizer. If you try to run the gas out, the VRO will fill the carbs with oil, this will turn to goo by spring.After the motor is run , unhook the flusher and drain the gear case and refill with fresh lube. If there is water in the old stuff, it could freeze and burst the case. Pull the spark plugs , tilt up and spray more storage fogging oil in the cylinders directly, turn it by hand to distribute it on the cylinder walls.

My Restored late 50's 19' MFG hull shortly after the Imron was applied.
My late 50's 19' MFG restoration, fresh Imron. Awesome!


This should take care of the motor innards. But - wait - you're not done yet. Here's the good stuff. Clean the powerhead up to remove accumulated crud and any salt deposits.Let it dry, douche it good with the 6 in 1 or equivalent, coat electrical connections with anti-corrosion spray.

Next, (unless you have hydraulic steering) disconnect the steering link arm from the motor and unscrew the big nut on the motor tilt tube. remove the steering cable from the motor and extend the cable all the way out. Run an oily rag down the tube to remove all the crud from the bore. Clean all the gunk off the cable and let it hang down for awhile to get any water out. then spray it, and the tube with the anti-corrosion spray. Leave it off and extended, hang it up under the well where it won't get in the weather. For hydraulic, remove the extenders that hold the cylinder and remove the rod thru the tube, clean as above. You ain't seen grief til this stuff all seizes up and you get the bill.

When you have the boat where you are going to store it, disconnect the battery and REMOVE IT from the boat, put it inside on a board and keep a trickle charger on it a couple days a month. Clean the terminals with soda and spray with the anti-corrosion treatment. Spray the area around the base of the powerhead and the trim (if equipped) with anti - corrosion. If the inside of your motor cover has a foam sound blanket and you use the motor in saltwater, see if it is a closed cell foam, if not RIP IT OUT! Salt is hygroscopic, that is it attracts moisture and the 2 do a great job of eating up the motor. All OMC motors use cheap foam. 86 it quick! Store the motor tilted DOWN to running position. And when you put the cover back on, don't wrap the motor in a piece of plastic or a "Blue" tarp. cover it up with a cloth cover and set a piece of plywood or something on top to keep rain off. Otherwise condensation will never dry off the block. Same for the boat. It's gotta breathe. If you have a really fancy rig to store outside, have a pro come out and shrink wrap the BOAT. Not the motor.

Last, but not least, attend to the trailer. Jack it up and pull the wheels and hubs. Repack the bearings, if you have buddy bearings, ensure they are full. Put the thing on blocks and store the tires in the shed. Spray anti - corrosion on any unprotected iron.

SO there you have it. with any luck, on that first nice spring day, your steering will steer, the trailer will roll, the motor will mote and a good time will be had by all. You may even save enough to upgrade that old PC you are reading this on! One last caveat! Check the registrations on the rig & trailer and renew them early so next spring you won't get fuzzed. I remember the fine spring day I went to the lake Sammammish launch ramp near Seattle. About 125 rigs parked there, half with expired tabs, and Smokey just writin' up a storm!


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The information provided on these pages is correct to the best of my knowledge, however the MasterTech makes no warranty, express or implied, regarding the use of, results of, or liability created from, application of this data. This information is disseminated in good faith, however MasterTech assumes NO LIABILITY whatsoever in regard to this service. The information, software, products, and services published on this web site may include inaccuracies or typographical errors. Changes are periodically added to the information herein. Mastertech may make improvements to this site at any time. Parts ordered from this website may or may not be in dealer stock at the time of order. Thank you for reading.