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Author Topic:   Winterize an Optimax
dspinosa posted 10-25-2003 06:52 PM ET (US)   Profile for dspinosa   Send Email to dspinosa  
What is the difference in winterizing a Mercury 150-HP Optimax and a regular outboard. I was told not to fog the engine but [the person providing this advice] did not know what to do.


aubv posted 10-25-2003 10:27 PM ET (US)     Profile for aubv  Send Email to aubv     

Instead of fogging, my Mercury 225 Optimax manual says something like remove plugs and squirt 1 ounce of motor oil (not two cycle/stroke oil) into each cylinder and rotate flywheel by hand. Other items like stabilizing fuel, changing lower unit oil, etc. are the same. There is a air filter for the compressor that needs to be change once a season(?) also.

If you don't have the basic manual which covers long term storage, you might consider getting the service manual-costs about $35.00. I waiting for mine to arrive. This is sage advice I've followed from another poster.

jimh posted 10-26-2003 08:35 AM ET (US)     Profile for jimh  Send Email to jimh     
Considering the investment one has in an Optimax 150-HP outboard, I would suggest consulting the owner's manual for guidance on winterization procedures.
Peter posted 10-26-2003 09:01 AM ET (US)     Profile for Peter  Send Email to Peter     
While I don't know anything specific about winterizing an Optimax, most fuel injected motors, whether DFI or EFI, require a winterizing soup to be run through the engine to winterize the fuel injectors. The soup typically consists of gas, fogging oil (or alternatively Marvel Mystery Oil), and a little fuel stabilizer typically in a volumetric ratio of about 10 quarts:1 quart:1 ounce. Additional fogging may or may not be recommended. Simply spraying fogging oil into the cylinders wouldn't take care of the fuel injectors.

It would be best to consult a service manual or friendly servicing dealer.

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