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Mercury 350 Verado break in

Old 03-20-2019, 06:55 AM
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Default Mercury 350 Verado break in

Hey guys. Iím sure there are a lot of folks on here smarter than me concerning the 350 Verado and itís break in so I am coming to you for break in advice. Iíve been told to run it up to 4500 varying rpms for the first 2 hours and then not to run wide open but in short bursts for the next 8. I havenít picked up my boat yet and will read the manual, but I wanted some real world advice from you guys who actually own Verados. Any educated opinions are appreciated! Thanks in advance!
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Old 03-20-2019, 06:57 AM
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It is clearly described in the owner's manual. It is not as you have been told.
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Old 03-20-2019, 06:59 AM
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Bad,

You are on the right track. That is the same break in I used and have not had an issue out of these engines yet. I went ahead and did an early oil change at like 50 hours to remove any possible metal shavings with new engine. Solid engine.
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Old 03-20-2019, 07:01 AM
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Originally Posted by alloyboy View Post
It is clearly described in the owner's manual. It is not as you have been told.
i appreciate the advice. And I fully intend on reading the manual, when I actually get my hands on it. I owned a 250 SHO for my last motor and followed the break in to the letter according to the manual. The motor quickly began making oil. Thus the reason I asked for the Verado. My dealer told me to run the hell out of it and it would quit. It did. Thanks again for the reply.
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Old 03-20-2019, 07:02 AM
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You might want to check out.... Your source for Verado Information - Index
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Old 03-20-2019, 07:16 AM
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Originally Posted by bad behavior View Post

i appreciate the advice. And I fully intend on reading the manual, when I actually get my hands on it. I owned a 250 SHO for my last motor and followed the break in to the letter according to the manual. The motor quickly began making oil. Thus the reason I asked for the Verado. My dealer told me to run the hell out of it and it would quit. It did. Thanks again for the reply.
Night and day between the Mercury and Yamaha break in procedures. Mercury mandates running at WOT for 12 minutes total time (one minute out of every ten) during the first two hours. Yamaha says not to run it at WOT during the first two hours.

Here is from a Verado Owner's Manual:
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Old 03-20-2019, 07:17 AM
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Originally Posted by Arg View Post
Bad,

You are on the right track. That is the same break in I used and have not had an issue out of these engines yet. I went ahead and did an early oil change at like 50 hours to remove any possible metal shavings with new engine. Solid engine.
Why did you not follow Mercury's advice?
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Old 03-20-2019, 05:49 PM
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Originally Posted by FASTFJR View Post
You might want to check out.... Your source for Verado Information - Index
Thank you!
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Old 03-20-2019, 05:50 PM
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Originally Posted by alloyboy View Post
Night and day between the Mercury and Yamaha break in procedures. Mercury mandates running at WOT for 12 minutes total time (one minute out of every ten) during the first two hours. Yamaha says not to run it at WOT during the first two hours.

Here is from a Verado Owner's Manual:
Attachment 1097208
Thanks bud. I appreciate it. That seems much easier to do than the Yamaha break ins. I appreciate it!
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Old 03-20-2019, 05:56 PM
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Originally Posted by alloyboy View Post
Why did you not follow Mercury's advice?
because sometimes manufacturers advice is bullshit. I have a Toyota Tundra that has a trashed motor because I followed their procedures to a tee. Sometimes you have to do better than they say
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Old 03-20-2019, 06:07 PM
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Originally Posted by VaporTrail1 View Post
because sometimes manufacturers advice is bullshit. I have a Toyota Tundra that has a trashed motor because I followed their procedures to a tee. Sometimes you have to do better than they say
Who gets to decide the better way? Everyone for themselves? If so, no reason to come here.

If there are ten different THT ways, which is the best of the ten?

Has there ever been any instance of anyone saying that the Mercury way is no good? If so, I have not seen it. Now when it comes to the Yamaha way that is another situation altogether.
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Old 03-20-2019, 06:24 PM
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I have owned many new Mercury engines. Always broke the engines in by the letter of the Mercury manual. Honestly, if anyone tells you not to follow Mercury’s recommended break in procedures to break in a Mercury they are an absolute moron.
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Old 03-20-2019, 06:33 PM
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I followed suzuki manual to the "t" and now I'm making oil. I was told I shouldn't have followed the manual and ran it harder. I wish I bought the ETEC and you just run it hard as hell right out the box. This 4 stroke kool aid is sour.

I'd say run the merc harder than the manual says and break in those rings or face my problem
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Old 03-20-2019, 06:38 PM
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Originally Posted by Brocnizer1 View Post
I followed suzuki manual to the "t" and now I'm making oil. I was told I shouldn't have followed the manual and ran it harder. I wish I bought the ETEC and you just run it hard as hell right out the box. This 4 stroke kool aid is sour.

I'd say run the merc harder than the manual says and break in those rings or face my problem
Mercuryís donít have your problem if you follow Mercuryís break in procedures.
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Old 03-20-2019, 06:43 PM
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Yes, I agree. I should have followed mercury procedure on my suzuki 350's. Lesson learned. I agree with Merc and running harder after my experience.
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Old 03-20-2019, 06:51 PM
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I donít think changing the oil too early would have any effect on how he broke in the engine
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Old 03-20-2019, 07:03 PM
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As per the dealer who repowered it instructions. I varied power through the recommended RPM (In the 4000's). I then would go full throttle to clean it out each trip. I had a service done at 30 hours. Engine runs great. What I found interesting, when I bought the boat, the dealer for the boat itself (not the same one), never told me about break in. They were verado 300's. I didn't have any issue with said engines at all. They were replaced with the 350's.


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Old 03-20-2019, 08:07 PM
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I agree with the majority. Followed Mercury’s manual to the letter. Rock solid, no issues.
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Old 03-20-2019, 08:18 PM
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Pin it to win it.
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Old 03-20-2019, 09:21 PM
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Broke mine on per the manual. Zero issues.
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