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    Overheating issue Yamy 115hp 1987 model

    I have done what I think is everything to fix this. I have taken off the heads and all cooling jackets drilling out all the blocked holes etc replaced the poppet valve and associated spring etc. Replaced the water pump impeller. Tested the therostats and heat sensors they all seem to be working...
  2. U

    115hp yamaha 1987 model Should I use Stainless steel for head bolts or not.

    Hi I have taken the head and cooling Jackets/ exhaust cover off my 115 hp Yamaha as it has been over heating and I needed to clean everything out. Some have suggested I replace the head bolts and all the cooling cover bolts with stainless steel bolts. This raises some questions in regards to...
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