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    Backflushing 15HP Yamaha

    Hi All..... Can anyone describe for me in words how to backflush a 99 Yamaha 15HP 4 stroke. I don't have any pics unfortunately. I'm not sure of the correct terminology for all the little holes, slots etc. I removed the thermostat cover....I know this hole. Theres a long slot at the bottom and...
  2. M

    What Is This Part???

    Hello Everyone... I have a Yamaha 15 H.P. 4 Stroke F15MLHX. Can someone tell me what exactly is this part....and what is it's purpose. I know it's a diaphragm assembly...It was leaking on me, so I ordered a new one and replaced it. Not very difficult for a back-yard mechanic! There is a spring...
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    How does the Lower Assembly go back on??? Help!

    Hey..... I was wondering can someone give me "Idiot Proof" directions of how to re-install my lower unit back on the motor. It's a Yamaha 15 HP 4 stroke ....F15MLHX. I took it off to replace the impeller on water pump, and when I started motor in neutral the prop started turning!! I hear...
  4. M

    Diaphragm Assy. on 15 hp Yamaha Outboard

    Hello.... I would be so grateful if someone could answer this for me.........The diaphragm assy. on a 15 hp outboard...What is the purpose? and how do you remove it to replace with a new one? Mine is dripping, and the gasket is kinda dry rotted. Thanks in advance!! Mahi Mahi :D
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