07 200hp Yamaha HPDI
273 hrs
Took my dad out fishing and spent 4-5 hrs idling/trolling (never got on plane) and drove fine no issues. Next trip out noticed speed had fallen off and was making ticking noise along with sneezing while idling. Thought it might have been a bad coil since the original plug looked like it was running super rich on 1 cyl. Changed out plugs and a new coil then went out night fishing. Everything was good fired right up no noise, idle was smooth ran around 3-4k rpm like normal then last run back to the ramp tach said 5k but I know I wasnt going that fast and then she shut off on me and locked up. Pulled the head and found the aftermath. Installed new powerhead and got the injectors flowed now jsut covering my bases to not kill this one anytime soon..
What do you guys think. when looking at the motor from the rear its the second one down (middle) Locator pins came loose, bad injector, bad fuel,heat, oiling issue???
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