Yammy 50 2stroke break-in and manual?
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sounds to good to be true buddy who in there right mind would go through the hassle of breaking in a motor and then never use it? most things if they sound to good to be true they prob are I dread breaking in a new motor.....
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2,390 Posts
I don't know what they did or didn't do.
The motor is being sold as having ten hours on it and being taken off a pontoon that was never used an garaged.
I am asking because I figured ten hours was very low and still in the break in period.
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1,544 Posts
It's broken in after 3 hrs, double oil for the 1st ten. All Yamaha owners manuals can be downloaded from Yamaha.
Do a compression test 120 min.
Do a spark check
Check lower unit oil.
Everything else can be fixed for min $.
Do a compression test 120 min.
Do a spark check
Check lower unit oil.
Everything else can be fixed for min $.
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2,534 Posts
You putting this on a new boat or just buying to resell?
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1,544 Posts
If it's an oil injected motor, then you will also add a 50:1 mixture in the gas tank. Which will give you double oil, howeve if the motor has 10 hours you don't need it!!!
What you will need is a water pump, carb re-buiild, fuel pump, spark plugs and LU oil changed.
No reason to drain all the LU oil just pull the bottom plug with the top plug still in very little oil will run out let some drip on your finger and see if there is any metal flakes or chunks if so it's going to need a LU. You will the metal shavings but shouln't be able to feel them with your finger just shiny stuff.
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2,390 Posts
Why would you change the water pump, rebuild carbs, fuel, sparks, and LU with a new motor? Or is just a 'just in case' from buying a used motor?
And will pennzoil synthetic tcw3 work fine on this engine? Or is the yamaha oil the best?
And whats the best LU oil? I'm used to using quicksilver mercury stuff...
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1,544 Posts
Yamalube only.
With so low hours I'm assuming the engine has sat for long periods of time the carbs are crucial to the longevity of the this engine it could be what seems to be running right but be slightly lean and your go to blow the power head. Yamaha carbs are the worst for gum, varnish, and thrash when they have sat.
All the rubber needs to be replaced for the same reason sitting causes the impeller to dry rot, fuel pump diaphragms, etc etc.
Gear oil should be replaced every 100hrs or once a year even if its not used moisture will build in the oil.
Sitting/low hours go hand in hand to each other and sitting has its one set of problems just as high hours do!
All this can be done for less than $250 if you do the labor yourself and your a great mechanic you say so its about 2.5 hrs worth of work so get to it Matty
Cut runner help me out here!
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2,390 Posts
Yeah I can do it all, I'm switching from mercury to yamaha so I'm not familiar with all of these new brands of things lol
Which LU oil now?
Edit: I am just going to call my local yammy dealer and find out what LU oil and yamalube I need and get a bunch.
Edit2: The owner of the engine said he got the carbs rebuilt already by a shop and has a receipt to prove it
Which LU oil now?
Edit: I am just going to call my local yammy dealer and find out what LU oil and yamalube I need and get a bunch.
Edit2: The owner of the engine said he got the carbs rebuilt already by a shop and has a receipt to prove it
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2,534 Posts
I've always used the Yamalube and same quicksilver for the LU service. Hopefully the carb rebuild was done recently and hasnt sat for any given period of time. I have had bad luck with Yami carbs but its probably just my luck. I would highly recommend using ethanol free fuel especially on a larger hp motor and tank. I started about a year ago and have since not had any carb issues. Mine gets ran atleast every week but even with the regular running, the 97 still gave me carb issues. Just a thought...
I perfer quicksilver hi performance lu fluid.
And I use quicksilver premium plus oil in my motor because it smokes less than yamalube.
Why u goin to a 50 matty?
I thought the draft numbers were a big deal to you being in the lagoon and all?
Is the shadowcast even rated for a 50?
And I use quicksilver premium plus oil in my motor because it smokes less than yamalube.
Why u goin to a 50 matty?
I thought the draft numbers were a big deal to you being in the lagoon and all?
Is the shadowcast even rated for a 50?
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