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Mangroovin

Time to Re-power

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For sure. Keep me updated on those performance numbers! I'm working on convincing the wife we need a new SHO.  My old hpdi 200 2.6 has been great but it's old now.

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1 hour ago, Mangroovin said:

What a beautiful sight late this afternoon!  Got the SHO put on today.  0 hours on it.  Break in starts tomorrow.  Big thanks to Brookside Marine in Naples.  Good to be back.:D:D

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Thats a great looking combo with that 250 hanging on the back. I Hope its fast and runs trouble free forever. 

 Take your time and break it in as per yamahas instructions . Joe R 

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There is a big debate on how to break these SHO motors in.  Personally, I would run it like a scalded ape from the get go!

It will run like a scaled ape!  Congrats on the repowered!

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I followed yamahas break in directions in my owners book on my yamaha 4 strokes  . I figured yamaha would know the best break in procedure to break in there motors being they have seen the results of how thousands of there SHO's last and perform after break in  . We paid a lot of money for our new motors and want to break them so the rings seal best .The first ten hours are important hours. .

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1 hour ago, dabear said:

I followed yamahas break in directions in my owners book on my yamaha 4 strokes  . I figured yamaha would know the best break in procedure to break in there motors being they have seen the results of how thousands of there SHO's last and perform after break in  . We paid a lot of money for our new motors snd want to break them so the rings seal best .The first ten hours are important hours. .

I erred on the side of caution, the manufacturer, and the operator’s manual.  I followed the manual’s  break in procedure rather than so many who told me to run it like I stole it.  The first time I pulled the dipstick, the level was 7 inches over the full mark.  I bought a pump on a bucket and have been pumping oil/gas out of the motor ever since.  I have over 100 hours on the motor, and it is still “making oil.”  I have bought 3 gallons of Yamalube to replace oil/gas to keep good oil in the crankcase.  I have been in constant communication with the Yamaha tech people in Atlanta, and they won’t even reimburse me for the Yamalube! 

You are right.  The first 10 hours of break in ARE critical.  If the rings don’t get honed in against the plasma walled cylinders in those 10 hours, then........

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32 minutes ago, JEM said:

I erred on the side of caution, the manufacturer, and the operator’s manual.  I followed the manual’s  break in procedure rather than so many who told me to run it like I stole it.  The first time I pulled the dipstick, the level was 7 inches over the full mark.  I bought a pump on a bucket and have been pumping oil/gas out of the motor ever since.  I have over 100 hours on the motor, and it is still “making oil.”  I have bought 3 gallons of Yamalube to replace oil/gas to keep good oil in the crankcase.  I have been in constant communication with the Yamaha tech people in Atlanta, and they won’t even reimburse me for the Yamalube!

Wow!  Well, did you buy the Y.E.S. warranty?  Sounds like you did everything right from the get-go.  Maybe it's time to stop buying all that extra oil on your own dime, maintain the expanding oil at the correct level, and just run the motor like a scalded ape until it either fixes itself or blows up.  It kinda sounds like that's what Yamaha is telling you to do anyway.  It might just be a lemon.

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I broke in my last 4 stroke on the hard side. After 10 hrs I drained the oil and replaced the filter. I was shocked by the amount of fine metal that was in the filter. I still wonder if I was too hard on it? It didn't make oil though and it ran great. I'm assuming the fine metal in the filter was from the rings seating into the cylinder walls.

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Actually, I do now run it like a “scalded ape!”   If conditions allow, it is very common for me to run 5000 rpms, with the hope that the load, heat, and crankcase pressure will eventually seat the rings.  These SHO engines really started out on bass boats, and you can read until you get bleary eyed on bass boat forums about the “making oil” problem with the V-6 SHO’s.  It’s kind of funny, but in my first call to the Yamaha tech help line, the tech guy tried to act like he had never heard of the issue!    But no, I don’t think I just got a lemon.  Other than this issue, I absolutely love the motor!  It is a beast!  I just think before the honing marks get worn down, you need to run it, and run it hard!  JMHO!

For the long term, I actually have high hopes that because of the high tech, hard, plasma cylinder walls, that the rings will eventually seal, and will last thousands of hours!

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