Question for Boscoe re shift shaft

[fairdeal]

what model engine is this?



My interests in Yamahas are generally limited to the 4 strokes 90-250 HP -

and I've never seen anything like parts #9 and#10 - apparently a "guide bushing" for the shift shaft.

[boscoe99]

F300XCA Offshore model. Same as the one the fellow reported on as not being shiftable.

The illustration is misleading insofar as it shows the female part of the shift shaft above the bushing.

2006 and Later F300XCA_04 Yamaha Outboard CONTROL Diagram and Parts

[pstephens46]

Part 23 is listed as a Sensor Assembly in the link. Shift position sensor?
Not familiar with these fly by wire models either. Shift actuator listed just over $900. I believe the F350 actuator was about $2400 if I remember correctly. Another reason to avoid Rodbolt's favorite motor I guess.

[fairdeal]

Ahhh.

So the "bracket" that holds both the bushings and the position sensor is located on the exhaust guide.

And #12 is a watertight grommet - on the underside of the exhaust guide.


That first drawing - from Boscoe's Service Manual - looks like it is on the LU -

(despite also showing that isn't plausible)

That had me completely lost.

[boscoe99]

I used two separate images to depict the upper shaft being connected to the lower shaft. I suppose now that I should have placed a line between the two images.

It does make it appear that the upper bracket is attached to the lower unit but of course it is not. It is attached to the exhaust guide as you note.

Here is a better view for those that want to see how it attaches to the exhaust guide. I was not trying to show that in my original image. Only a "Fairdeal" type would have picked up on this.

Actually, it was a test to see if Fairdeal was awake and paying attention in class. He was. One attaboy for the Fairdeal man. Mr. FW Pratt. Who might eats no fat. I don't know.

[erniefish]

My buddy just had a actuator fail on his motor ,shift shaft related ,*** that is a lot of money to spend ,I have never worked on it , nor do I have any desire too

[TownsendsFJR1300]

Yep, MORE electronics is better

[pstephens46]

You would think the F300 and F350, would at least, share the same actuator.
It appears that Yamaha uses a different design team on each motor. And all the teams hate each other.

Imagine the cost savings up and down the supply chain if there was some standardization.

[boscoe99]

You would think the F300 and F350, would at least, share the same actuator.
It appears that Yamaha uses a different design team on each motor. And all the teams hate each other.

Imagine the cost savings up and down the supply chain if there was some standardization.

I recently suggested one common EFI system for all EFI models using tens of parts in total instead of hundreds of parts in total. A simpler, more cost effective solution resulting in a less expensive, lighter weight motor that would be easier to trouble shoot.

The idea was roundly poo poo'd. Seems the more the parts and the greater difference in parts the more that Yamaha and Yamaha owners like it.

Go figure.

[rodbolt17]

shift shaft bushings and shift actuators are gravey money.
a half trained monkey can do it.
so far the only shift actuators I have seen fail were caused by the bushing housing corrosion locking up the shaft.

[pstephens46]

I wonder if Suzuki parts are more standardized than Yamaha? Possibly allowing for some of the competitive price differences.

[rodbolt17]

the F300 and F350 do share a common actuator.
as long as both are V8 motors.
the 4.2L v6 share common actuators.
it is why model numbers are rather important.

[pstephens46]

Why wouldn't the V-6 and V-8 share the same actuator?
Only Yamaha knows.....

Wonder how many V8 300's were sold? Don't think I have ever seen one.. Same with the F175...

[cpostis]

Wonder how many V8 300's were sold? Don't think I have ever seen one.. Same with the F175...

Well, I was bored watching a blowout football ****, had nothin' better to do.

Here's what Yamaha said about it's introduction:

"Yamaha Marine Group Announces New F300 V8 Outboard
Oct. 8, 2007
Yamaha Marine Group today announced it will offer a 300-horsepower outboard based on the V8 5.3-liter, four-stroke Yamaha F350. Called the F300, the new outboard fills a niche in the marketplace for single and twin applications.
The F300 is for boats with transoms that are limited to 300 or 600 horsepower -- boats that need a lot of thrust but not all the power of an F350.
Like the Yamaha F350, the new F300 gets all the latest Yamaha technology, such as:
• Ionic combustion sensors that constantly monitor combustion conditions and adjust spark timing;
• A dimpled outer cylinder sleeve to reduce oil consumption; the new Enhanced Ultimate Corrosion Protection System (UCP-II™) with additional sacrificial anodes;
• An innovative internal paint process and new-generation head gaskets;
• Yamaha’s Command Link® Digital Electronic Control system with redundant electronic engine control, automatic multi-engine synchronization and electronic throttle and shift.
Exclusive features include:
• Operates using 87 octane gasoline rather than 89
• Fuel and ignition maps designed to optimize power using lower octane gasoline
• Available in February 2008.
Please consult the YMBS “sales” tab to find detailed program and confidential pricing information along with a Quick Reference Guide for the F300/F350.
Contact your District Marketing Manager for additional information."

Damn thing weighs over 800 pounds. Looks like made between 2008 and 2010 model years only. Yamaha does not even have any boat performance bulletins on their site. NADA only has them listed as 2009 model year, not any others

Guess not many V8 300's sold. Maybe you can get a deal on a brand new 2009 that's been siting on a sales floor for awhile!


[IMG]F300V8 by Charles Postis, on Flickr[/IMG]

[boscoe99]

Guess not many V8 300's sold. Maybe you can get a deal on a brand new 2009 that's been siting on a sales floor for awhile!

I would suspect that any unused V8 F300's got modified to a V8 F350 and sold as such. Just change the ECU, the cowling graphics, the data plate and voila, there is an F350.