Yahama Vino - Oil Spill

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bradmeehan
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Yahama Vino - Oil Spill

Post by bradmeehan » Mon Jul 16, 2018 11:48 am

I was taking my daughter on a ride on my '08 Vino 50 (4 stroke) and it started bogging a bit. We heard a loud 'pop' (backfire maybe?) so we returned home, about a block away. When we stopped, it was smoking badly and there was oil DUMPING onto the ground so I shut it down.

1. I haven't torn into it yet, but wondering it a backfire could cause this? Crank seal blown out maybe?

2. Where should I look first?

Also, i put some SeaFoam in the tank a few days before because it had been hard to start when normally it was a first-kick start every time. Does SeaFoam cause side effects?

Any help would be great.

Brad
1986 Spree
1986 Spree (Big Bore)
1985 Aero 50
1985 Aero 80
1988 Elite 50 (SB50)

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noiseguy
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Re: Yahama Vino - Oil Spill

Post by noiseguy » Mon Jul 16, 2018 1:58 pm

Your first step is finding the source of the oil leak. Could be anything from a blown seal / gasket to a cracked case... you won't know until you start pulling off the panels.

On 4 strokes backfire is usually caused by ignition issues... if you've ever tried shutting off engine while driving a manual transmission car with carb, then re-starting, you get a fierce backfire from the loaded up fuel charge in the system. Review your ignition components.
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Re: Yahama Vino - Oil Spill

Post by bradmeehan » Thu Jul 19, 2018 10:34 am

Thanks, Noiseguy. I'll tear into it this weekend and report back what I found.
1986 Spree
1986 Spree (Big Bore)
1985 Aero 50
1985 Aero 80
1988 Elite 50 (SB50)

1985 "OrangeJuice" (Sold)
https://www.youtube.com/watch?v=8CYYlkRRqa8

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