DF175 Making a high pitch wining noise

[winb377]

Greetings. We need some help please.. we have a DF175HP 2012 model and this engine has only got 30 hours on it from NEW.. We have a high pitch whining noise when running at idle and gets even worse when throttle is increased. We have had the powerhead off and replaced the timing tensioner, oil pump bearing, bottom offset crank bearing and the main bearing on the offset crank...Today we took off the intake manifold to check if we had any kinked fuel pipes or bad hoses and it all looks ok.. Engine is brand new and idle and purs away... this engine is on a twin rig and the other engine runs quiet as we would expect... HELP PLEASE ANYONE..... Regards

[winb377]

problem solved

[Solarman]

Might be helpful if you could elaborate a little on what you found, might help if someone else runs into the same issue?

And thanks for posting it's solved.

Good luck.

[winb377]

Small oil pump bearing that's pushes into the crankcase that the pump shaft slips into ... Noise gone