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Yamaha 350 Redesign "Debut Date"

Old 07-30-2020, 07:56 AM
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Default Yamaha 350 Redesign "Debut Date"

There was a previous THT thread confirming that the Yamaha F350C was discontinued earlier this year. I have heard that a redesigned Yamaha 350 has been in the works.

Has anyone heard when the potential debut date is for the redesigned 350 or any motor specifications?

Thanks,
Old 07-30-2020, 07:58 AM
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there are surely others around here that are more in-the-know than I but I heard from a dealer earlier this year that they were going to massage another 50hp out of the 4.2 block.
Old 07-30-2020, 01:43 PM
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Getting 350HP out of the current V6 4.2L block would be an impressive power to weight ratio package, if that does come true. That would also most likely provide more low end torque than the Verado V6 2.6L 350 for a comparison.
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Old 07-31-2020, 06:49 AM
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Originally Posted by BlueWaterJ View Post
There was a previous THT thread confirming that the Yamaha F350C was discontinued earlier this year. I have heard that a redesigned Yamaha 350 has been in the works.

Has anyone heard when the potential debut date is for the redesigned 350 or any motor specifications?

Thanks,
The THT information about the F350C being discontinued was typical THT crap information. Many will believe it and pass it on. And on. And on. It then becomes THT truth.

Where did you hear/read that the F350C was going to be redesigned? Here on THT?

And why would the F350C need to be redesigned? Has been in production since January 2016. Seems to be working well.
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Old 07-31-2020, 07:36 AM
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If you can classify 'the fault code to replace the flywheel after 80hrs of operation in a normal cruise rpm range for anybody with a family boat who isn't running like a bat out of hell' an ECM problem, I would agree.
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Old 07-31-2020, 07:46 AM
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Originally Posted by HarborRd View Post
If you can classify 'the fault code to replace the flywheel after 80hrs of operation in a normal cruise rpm range for anybody with a family boat who isn't running like a bat out of hell' an ECM problem, I would agree.
It is not a fault code that is being reported. It is a maintenance code. Reminding that the rotor needs to be replaced.

Similar, but different, to the time to perform the 100 hour maintenance notice that the ECM provides.

If the ECM reminding the user that it is time for maintenance to be performed can be considered to be an ECM design problem then so be it.

My automobile tells me when it is time to change the oil. I never thought about that being a problem within the ECM.
Old 07-31-2020, 07:48 AM
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It’s all rumors.

The rumor that I heard is that the 4.2 liter V6 Yamaha based 350hp was shelved due to lack of performance increase over the 300hp.

If I was king of Yamaha for the day, I say they need a dedicated 800lbs 350hp - 400hp platform.
Old 07-31-2020, 07:56 AM
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I spoke to my certified Yamaha mechanic and the F350C is at the end of its run, They Still have new inventory in the system but are no longer producing them. I want to power my next boat with them and I own them on my current boat. The rotor issue is blown way out of proportion. The maintenance alarm goes off and you take the motor in and they replace it for free, mine was just done and the boat was in and out in an hour. They are also being replaced with anywhere near 80 hours so if you are in for a 100 hour and you have 65 hours in the bad zone they will go ahead and replace them. Sure its heavier than a 350 Verado but it also has a ton more torque and will be faster than a 350 Verado on a hull that needs the torque which says a lot since Yamahas aren't the fastest motor typically given the horsepower.. They aren't great on every hull but on many of the large twin powered offshore boats they are the ideal motor.

Old 07-31-2020, 08:35 AM
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I was told by the owner of a large boat manufacturer that the Yamaha F350C was discontinued and couldn't be purchased for a new build.

Additionally, was informed a redesigned 350 was in the works, that was several months ago.
Old 07-31-2020, 09:14 AM
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Originally Posted by BlueWaterJ View Post
I was told by the owner of a large boat manufacturer that the Yamaha F350C was discontinued and couldn't be purchased for a new build.

Additionally, was informed a redesigned 350 was in the works, that was several months ago.
being that i just purchased a new boat with a brand new 350c, im going to say he is wrong!
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Old 07-31-2020, 05:50 PM
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Originally Posted by captbone View Post
Itís all rumors.

The rumor that I heard is that the 4.2 liter V6 Yamaha based 350hp was shelved due to lack of performance increase over the 300hp.

If I was king of Yamaha for the day, I say they need a dedicated 800lbs 350hp - 400hp platform.
Isn't the new Zuke 350 4.4 L block with higher compression? If they need 4.4L and higher compression to get 350 HP.

Then the 4.2 would seem hard to get to 350 N/A .

Old 07-31-2020, 06:31 PM
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Originally Posted by HarborRd View Post
If you can classify 'the fault code to replace the flywheel after 80hrs of operation in a normal cruise rpm range for anybody with a family boat who isn't running like a bat out of hell' an ECM problem, I would agree.
as Iíve said many times, only NON owners are inconvenienced by flywheel change at routine service intervals. Iíve never seen an owner of the F350ís complain of flywheel replacement free of charge for life of engine.
Old 07-31-2020, 06:35 PM
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Originally Posted by tkramerv View Post
as Iíve said many times, only NON owners are inconvenienced by flywheel change at routine service intervals. Iíve never seen an owner of the F350ís complain of flywheel replacement free of charge for life of engine.
If having a flywheel replaced is an inconvenience, it must kill them to have the oil changed.
Old 07-31-2020, 07:15 PM
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Originally Posted by captain28570 View Post
Isn't the new Zuke 350 4.4 L block with higher compression? If they need 4.4L and higher compression to get 350 HP.

Then the 4.2 would seem hard to get to 350 N/A .

Exactly. It has another set of fuel injectors and higher compression. It can be done but the juice may not be worth the squeeze.


The 5.3 liter V8 350C is known to be a powerhouse. It would embarrassing to compare performance bulletins with twin 350hp V8 from five years ago and have them beat the pants off a 2021 Yamaha 4.2 liter V6 350hp on the same hull. No one wants to go backwards.
Old 07-31-2020, 07:57 PM
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Originally Posted by tkramerv View Post
as Iíve said many times, only NON owners are inconvenienced by flywheel change at routine service intervals. Iíve never seen an owner of the F350ís complain of flywheel replacement free of charge for life of engine.
I guess you could just wait for the magnets to come loose and chew everything to bits under the flywheel, that's inconvenient.....
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Old 07-31-2020, 08:26 PM
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Originally Posted by WaterDamage View Post
The fact that it's the ONLY outboard that needs the flywheel replaced at all, let alone every 80 hours, speaks volumes.
Volumes spoken. Tales full of sound and fury. Signifying nothing.
Old 07-31-2020, 08:30 PM
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Originally Posted by evernic View Post
^^^^^ this
I think a manufacturer should be ashamed of such poor engineering

just sayin
Ashamed. Yes.

As are GE, Rolls-Royce, Pratt & Whitney, Boeing, Lockheed, et al who produce products containing life limited components.
Old 07-31-2020, 08:36 PM
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Interesting, what started out as a rumour about a possible maybe that could be true, turned into how a certain brand has a fault, and will rectify the situation for free, is a bad company.....who needs Evinrude to start a riot?
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Old 07-31-2020, 08:45 PM
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Originally Posted by alloyboy View Post
Ashamed. Yes.

As are GE, Rolls-Royce, Pratt & Whitney, Boeing, Lockheed, et al who produce products containing life limited components.
ehhh not really a fair comparison
Old 08-01-2020, 03:46 AM
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Originally Posted by alloyboy View Post
Ashamed. Yes.

As are GE, Rolls-Royce, Pratt & Whitney, Boeing, Lockheed, et al who produce products containing life limited components.
those are designed to be life limited for a reason. This serves no purpose and is simply a design flaw.

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