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Recent content by eddievan

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    1998 YAMAH 115 HP BETO 2-Stroker Lubrication System Check Valves

    Hi, here is a picture of my Engine ID Plate, I have it in Europe so maybe you dont have this model in the US
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    1998 YAMAH 115 HP BETO 2-Stroker Lubrication System Check Valves

    Hi and thanks for your replies, here are a couple of pictures that can bring some light to this topic. Please remember that my question is "what effect will I notice if all 4 check valves are stuck in the open position". The picture below shows the rear sides of the Throttle Valve Assy to the...
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    1998 YAMAH 115 HP BETO 2-Stroker Lubrication System Check Valves

    Hi all, I am interested to understand the purpose of the check Valves (1 per feed line from the engine driven main oil pump). A Check Valve can have one out of three different ways of "operating" 1. The normal way, allows oil to flow in one direction (towards the valve body and in to the crank...
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    Yamaha F150 Two Stroke built year 1999

    Today I found out this 1. Spark plug with metal pitting and no comp in the left lower cylinder 2. spark plug with metal pitting in the lower right cylinder 3. Both thermostates normal and no dirt or oxidation 4. Engine borescoped with evidence of severe damage in one cylinder, most likely lower...
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    Yamaha F150 Two Stroke built year 1999

    Re: Yamaha 150 Two Stroke built year 1998Hi Hi all and thank you for being patient :rolleyes: Yesturday I picked upp the boat and engine and the engine is of a model Yamaha 150BETO year V and Long Stem. So it is of the second built generation, with electric start and elektro-hydraulic...
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    Yamaha F150 Two Stroke built year 1999

    Hi, I have just bought a motorboat with an Engine with an known issue but the cause is not found. It starts up fine but it makes a metallic scrambling sound that of course does not sounds good. I know that it could be "anything" and its is inmpossible to tell without more information but I...
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