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Change oil or not

Old 09-28-2020, 10:18 AM
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Default Change oil or not

Have a 70 h.p. Yamaha that was only used less than 15 minutes this summer. Engine had all fresh fluids and filters at beginning of summer. Would it be necessary to change all the fluids and filters even though the engine was basically not used?

Thanks.........
Old 09-28-2020, 10:24 AM
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others amy not agree, but I would not
I would run the gas out of it
Old 09-28-2020, 10:26 AM
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No. Can easily go 2-3 years without issue on a relatively new motor if low usage (under 100 hrs).

This is THT though, so some here might crucify you for even considering it.

I've gone 2 years between services on my trailered F60 during low usage times, under 100 hours.
Old 09-28-2020, 10:58 AM
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Thanks.....Engne has 52 hours on it.
Old 09-28-2020, 11:01 AM
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I’m sure it will be OK - some may disagree with the time element but when you think
the time limit is two years on most modern cars these days, I think you’ll be fine.
But if it’s something that would nag at you do it so you can relax about it.
Old 09-28-2020, 11:04 AM
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No. Absolutely not. Run some Stabil through it and put it to bed.
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Old 09-28-2020, 11:05 AM
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Nope, I would leave it alone.
Old 09-28-2020, 11:07 AM
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I'd run some fuel stabilizer through it, or run the fuel out of it and put it away.
Old 09-28-2020, 11:14 AM
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Absolutely not.
Old 09-28-2020, 11:47 AM
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Thanks for the responses........I'll run the stabilizer through it, and call it a winter.. Appreciate the info...
Old 09-28-2020, 11:53 AM
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Originally Posted by D.M.D. View Post
Thanks for the responses........I'll run the stabilizer through it, and call it a winter.. Appreciate the info...
You realize if you do this now, we'll get several weeks of good weather? Thanks in advance for your sacrifice.
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Old 09-28-2020, 01:21 PM
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Is this the original oil from 0hrs?....if yes, I would definitely change it...if not, no worries
Old 09-28-2020, 01:47 PM
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In the northeast, where it freezes, you should at least remove the bottom gear oil plug to ensure there is no water in there. Water+cold=freeze=cracked gearcase.

Old 09-28-2020, 02:38 PM
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I only ran my motor twice this year on muffs. About 20 minutes each time with plenty of stabilizer. Going to leave it alone until next year. Only 13 hours on it. Changed all the fluids last year.
Old 09-28-2020, 03:23 PM
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I personally prefer to have 30 min on new oil before storage. (when was up north) That way on the moving parts have fresh oil on them rather than 100hr oil on them. Time is not the issue. It is the acid that gets into the oil from combustion. IMHO best practice is to change oil BEFORE storage NOT in spring. Then run motor for a bit, 1 hour or less and put it to bed until the summer fun time.

Now just a jab, Here in Florida, we do it at 100 hours regardless of time of year.

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