Storage seal vs premium plus winterize

Mercury 250 2 stroke pro xs serial 2B362393 on a 2017 Ranger 521c

I was wondering thoughts on storage seal versus using premium plus oil to winterize? Any pros/cons?

NEVER use storage seal in an Optimax engine.

Thanks. Just bought a service manual from you.

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Originally Posted by EuropeanAM

NEVER use storage seal in an Optimax engine.

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EVER NEVER

That’s funny the bottle says for use in all 2 & 4 stroke carbureted and fuel injection engines.

i know , wreaks havoc on direct injectors

Are you guys talking about not using mercury storage seal fogging oil mixed with gas and not running it through a running optimax or are you talking about not using it to remove spark plugs and spray into cylinders for the winter?

wouldnt do either one on an opti

I winterize 200 motors a yr in New England. boats are going to bed for 6 mos.
Have always used a winterizing fuel mix, but it's had to change as motor technology changes.
Pulling spark plugs is not practical trying to winterize a lot of boats in a short weather window.

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Originally Posted by Another Distraction

Are you guys talking about not using mercury storage seal fogging oil mixed with gas and not running it through a running optimax or are you talking about not using it to remove spark plugs and spray into cylinders for the winter?

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Originally Posted by Another Distraction

Are you guys talking about not using mercury storage seal fogging oil mixed with gas and not running it through a running optimax or are you talking about not using it to remove spark plugs and spray into cylinders for the winter?

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Storage seal should not be utilized on or in any component of an Optimax engine as it can cause direct injectors to stick and/or fail.

See FAQ Section for suggestions on proper Winterization.

You learn something everyday. Thanks Don and Joe! I never knew Quicksilver's fogging oil was a hazard to an opti.

:thumb up2: and never spray any starting or solvent based fluids in intake one ,,,,,, ever never ever ever

Can I ask why my manual under protecting I internal engine components in storage section says use 30ml oil or 5 second spray storage seal into each spark plug hole? I'm confused why manual says can use storage seal but everyone saying no.

Good catch Skeeter

serv manual 8m0122849 ser numbers 1B973744 and up( for your engine ) page 1b-19 , protecting internal engine components 1oz of engine oil per cylinder no mention of storage seal , manuals are updated and revised as needed

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Originally Posted by JOE54

serv manual 8m0122849 ser numbers 1B973744 and up( for your engine ) page 1b-19 , protecting internal engine components 1oz of engine oil per cylinder no mention of storage seal , manuals are updated and revised as needed

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^^^^+1^^^^

And, this is why Don posted to see the FAQ for the most current recommendations.

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Originally Posted by Skeeterzx19

Can I ask why my manual under protecting I internal engine components in storage section says use 30ml oil or 5 second spray storage seal into each spark plug hole? I'm confused why manual says can use storage seal but everyone saying no.

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What part number manual and what page?

Manual part number I believe is 8M0113742. Mercury operation maintaince amd installation. 200-250 optimax including pro xs. 2015 mercury. Page 68 under storage titled protecting internal engine components. #1

Thanks for clarifying. That's from an Engine Operation Manual, but still SHOULD be correct. Unfortunately, that one isn't likely to be updated as those engines are no longer in production.

Definitely DON'T use it in your Optimax, though.