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Yamaha 115

D

Dataurus

New member
Morning,

I got a 18’ Polar Flats Boat with what looks like anaftermarket Yamaha 115 on it, the shop thinks about a 2003. Took it by a shop, they checked it and ran it on the river. Holds compression,purrs, pees, the consensus from the shop was it ran great and takes off like ashot. He changed the plugs and foot oil, Awesome!

The question I had was, when it was handed down to me, thecomment was made to use 1qt to 6 gallons of fuel, which seems ridiculous tome. That’s what 25:1? The shop (and everything I researched) istelling me to use 50:1…

Why would they be using twice the amount of oil? Additionally, what is the impact to the engineif I go to 50:1?

This is my first boat with a large outboard, so of course Idon’t want to break it…😊
Thanks!
 
Any pictures of this " aftermarket " Yamaha motor ?----Model # of it-----Your location ?----Any other identification on the motor ?----Enduro model ?
 
It is either an Enduro model or an oil injection model that some fool removed the oil injection system from.

Enduro models typically run a 50 to one gasoline to oil ratio. Some nervous nellies like to increase the amount of oil, on the basis that they know more than Yamaha does. Lots of folks that have models that run a 100 to one ratio go to 50 to one. So it seems some with a model that runs at 50 to one like to go to 25 to one. I suspect that during they break in they go to 12 to one.
 
I don't seem to be able to upload pictures. Took a few that were about 5-6mb, then reduced them to 1.5mb...still won't upload...:-/. I'm not sure why, but the forum does not appear to want to let me load pictures...

Yamaha V4 115
It says Engine Family 1YMXM1.731CA
Yamaha Motor Co.,LTD. 6N6-2179X-03
 
On the left hand side of the motor on the clamp bracket there should be a data plate. The engine ID begins with the number 6. In your case more than likely 6E5L and then some numbers. What are those numbers please? Or, look at the CDI for some numbers and letters. What are they? I suspect 6E5 but you need to confirm this please.

Is their an oil tank mounted on the motor? Does it look like the oil tank has been removed?
 
So the plate/sticker with ANY of that information is scratched off...gives me a warm fuzzy feeling. But what can I say...got it from my uncles estate allot cheaper than the family was gonna sell it for...

All i can tell is that the cowling says V4 115
I do not see anything mounted on the engine, is there anywhere inside the cowling that might have any information?

Is there something about the site that prevents me from posting images? I've tried uploading some, it goes through the motions, but then never shows the images. I can send them directly if anyone is willing to provide me a Gmail address or anything?

Thanks again for the info...
 
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