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Setting the record straight: The NEW Yamaha F350 - a different story?

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View Poll Results: Have you ever heard of any issue with the 2016 F350?
No, clean bill of health as far as the 2016 is concerned
26
65.00%
Yes, I have heard (please elaborate in thread if yes)
14
35.00%
Voters: 40. You may not vote on this poll

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Setting the record straight: The NEW Yamaha F350 - a different story?

Old 04-26-2019, 02:15 AM
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Default Setting the record straight: The NEW Yamaha F350 - a different story?

We all know it. The 2007 version was riddled with flywheel issues, the harmonic issues also having implications for the crankshaft, etc. Moreover, the 2007 version had a bad rep due to corrosion problems, etc.

However, the F350 has been updated several times, although the flywheel issue is still - even in the 2016 version - handled as a maintenance issue by Yamaha paying for replacement of the flywheel every 80 hours registered between 3250 and 4200 rpm (or some similar rpm register).

There are lots of discussions mixing the different versions together, and a lot of people saying "stay away", inevitably with reference to the user's own experience of flywheel issues, corrosion issues etc., or based on information from people having experienced this.

Why the need to set the record straight?

Because my clear impression is that practically 100 % of all complaint stories about the F350 involve older versions than the new 2016 version, most often 2007-2010, although some complaints pertain to even newer models, but the complaints are never about the 2016 version.

The reason for this?

The 2016 version is significantly updated. There is a new flywheel from Mitsubishi (my dealer told me this was run 10 000 hours in a test environment with no harmonic issues). The word is that replacement of the flywheel is not even necessary anymore, but is only carried out to be 100 % certain that the failure never happens again. Furthermore, the new 2016 version has better performance at WOT and a full correction of the corrosion problems.

Consequently, is it time - finally - to give the F350 a clean bill of health, provided that this clean bill of health is limited to the 2016 version?

Put differently, please come forward if anyone has ever experienced or heard of issues with the 2016 version, which has now been sufficiently long in operation for the question to be relevant.

**BASED ON THE ONE "YES" (without any elaboration), I should strongly emphasize the following:

For the person voting "yes": Could you please elaborate? Specifically, was it the flywheel?

I should perhaps specify: Of course I do not mean to say that the new F350 is perfect, no outboard is, and the underlying premiss for the poll is "have you heard of a 2016 version with any of the particularly problematic issues that traditionally plagued the F350"?

See for instance the thread today about the prop hubs problems for the Mercury Verado 350. Or the major Suzuki 350 recall issue, discussed in another thread.

Thus: I could ask the same question for all outboards, and no engine would have a perfect track record.

What I mean by "clean bill of health" is obviously: Are the extraordinary issues gone? (extraordinary = the issues that for several years have plagued the F350 systematically and in a downtime-causing way, without any clear fix (unlike the Suzuki issue, which due to the recall is being corrected systematically).

In other words: Is there now, with the 2016 version, no longer any basis for saying that the Yamaha F350 is plagued with systematic and enduring downtime-causing problems that in practice would make the F350 stand out in a significantly negative way as compared to other outboards that "only" have normal (more sporadic and varied) problems? Downtime causing in practice is key: I am not interested in theoretical answers along the lines of "I am not satisfied until the flywheels are no longer being replaced"; the issue I am asking about is: Are there any factual and practical examples that the flywheel still causes downtime? My impression is that this is no longer the case; all we are left with is a bad history for previous versions, and theoretical discomfort about "in principle I do not like to change the flywheel because I view this as different than changing spark plugs". This discussion has been done to death, please do not hijack the thread with that subject, which is of no interest at present.

On a side note: If you have positive experience with the 2016, please inform!

Lastly: No, I do not work for Yamaha :-)
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Old 04-26-2019, 03:36 AM
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2016 model "c" version twin 350s no problem with either one 380 hours and only 2 hours in the flywheel replacement range which for all the nay sayers on the flywheel replacement being a pain or stupid or whatever let's do some rough math. It is replaced at 80 hrs in that 3250 to 4200 rpm range that means I will need to change mine at around 15,200 hours on my engines.
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Old 04-26-2019, 04:22 AM
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They're still junk. Sorry.
lower units are a constant failure , trim motors that rust out every couple years, shift rods that corrode up..
Theres a reason the new 425 is internally balanced......
And whoever told you the C model has a "better" flywheel is full of .....
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Old 04-26-2019, 04:33 AM
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Originally Posted by HarvestTime View Post
They're still junk. Sorry.
lower units are a constant failure , trim motors that rust out every couple years, shift rods that corrode up..
Theres a reason the new 425 is internally balanced......
And whoever told you the C model has a "better" flywheel is full of .....
Have you heard of any flywheel issue with the new 2016 model, I mean actual failure?
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Old 05-08-2019, 05:03 AM
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I am looking at a Grady White 330 with a pair of Yamaha 350’s 2018, do they have the corrosion issues and flywheel problems
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Old 05-08-2019, 05:23 AM
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Could you please explain that in another way? I didnt get it the first three very lengthy ways you worded the same question. Lol

All jokes aside, im not sure why anyone is still brand loyal to Yamaha. They have have so many major failures, the hdpis, the 225 exhaust manifolds, other corrosion issues, these flywheels, etc etc. These arent normal minor things, and were always hearing about them on such a widespread basis, yet yamaha seems to pretty much ignore them, and not stand by their failures, leaving to consumer to pay for the mistake of buying their product. How many times have we all read about this on this very forum? Yet still so many fanboys blindly claiming how their yamahas are the greatest of all time

By the way, im a guy who had been riding only yamaha dirtbikes, Fourwheelers, streetbikes and snowmobiles, since i was 8 years old. Nearly any other motor product and im all for yamaha. As far as outboards, you wouldnt catch mw laying out the big bucks to buy a new one. Only way id own one is its used, a great deal and on a boat i really wanted, and it already had all the bs worked out.

Last edited by Reeseman44; 05-08-2019 at 06:06 AM.
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Old 05-08-2019, 07:00 AM
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do they still need to be winterized with antifreeze?
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Old 05-08-2019, 07:07 AM
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so the new version has a 10,000 hour flywheel but the chose to pay 300.00 per pop just for fun
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Old 05-08-2019, 08:43 AM
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Originally Posted by fireisland1 View Post
so the new version has a 10,000 hour flywheel but the chose to pay 300.00 per pop just for fun
You donít pay for it... Itís free
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Old 05-08-2019, 01:15 PM
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I understand it is for free. I am asking, Why would Yami pay if the problem is fixed?
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Old 05-08-2019, 02:11 PM
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  1. That we're even talking about something like widespread flywheel failures is absurd, much less for a product run of more than 10 years
  2. Many don't think they make the advertised HP
  3. Heavy, still too heavy
  4. Lower unit and props not really well designed to get the power to the water efficiently
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Last edited by BigBone; 05-08-2019 at 02:30 PM.
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Old 05-08-2019, 02:31 PM
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Originally Posted by Albert_TT View Post


You donít pay for it... Itís free
Is it free after the warranty runs out, or is just free-wheeling flywheel frisbees at that point?
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Old 05-08-2019, 02:37 PM
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Originally Posted by BigBone View Post
Is it free after the warranty runs out, or is just free-wheeling flywheel frisbees at that point?
Even after the warranty runs out. I use to have a pair of F350s.

Last edited by Albert_TT; 05-08-2019 at 03:45 PM.
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Old 05-08-2019, 02:40 PM
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Originally Posted by BigBone View Post
Is it free after the warranty runs out, or is just free-wheeling flywheel frisbees at that point?
The rotor change is covered under warranty (at the shop) until further notice by Yamaha.
Whether the engine is in or out of warranty.
Should it need to be changed at the owners dock, etc, the shop will/could charge a service call.
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Old 05-08-2019, 03:30 PM
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They still seem to have problems. Guy docked next to me has trip 350 on his new Intrepid. Just kaboomed one at 80 hrs
No agenda here, Yamaha makes good motors. . Have an F300 now and have owned 4 before. All good motors.
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Old 05-08-2019, 03:42 PM
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I’ve owned lots of Yamaha 4 strokes over the years including a pair of 350’s.

They build a great engine in my opinion.

However, I will never, ever own another 350 from yamaha. I’ll leave it at that.
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Old 05-08-2019, 05:01 PM
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The flywheel issue is still an issue. No matter how Yamaha takes care of it. If they gave a crap, they would fix it. Not bandaid it.
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Old 05-08-2019, 05:34 PM
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Default 350 engines

I have a 2013 os385 that I bought used .The original owner blew all three engines . Three new 2015 engines were installed when I bought the boat and I have 500+ hrs.on them without any problems .why ? I don't know but I take very good care of mine .Have several friends that have replaced with long blocks and I know that answer poor maintenance .Have one I know changes his lower unit oil every 200 hrs or so. When someone blows a engine (any make ) no one on here gets the whole story . Just bought a new commercial mower and a Kubota utv , and read all reviews . If I followed the reviews wouldn't have bought either.Think how many tens of thousands of products out there and what compairson to the complaints.we don't know.
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Old 05-08-2019, 07:13 PM
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Not a bad design if you think changing your flywheel every 80 hours is routine maintenance.
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Old 05-08-2019, 08:57 PM
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Originally Posted by Yellowfin85 View Post
Not a bad design if you think changing your flywheel every 80 hours is routine maintenance.
Just to clarify for you.
Changing the rotor after 80 hr's at a given rpm range, not 80 hrs of use.
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