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Old 16 August 2008, 12:38   #1
Country: UK - England
Town: torquay
Boat name: black jack
Make: aquafish
Length: 6m +
Engine: yamaha 372 hydra
Join Date: Aug 2008
Posts: 1
yamaha ME 372 hydra drive

Can anybody ease my worry,I have the ME 372 yamaha hydradrive unit which i cannot fault
but i have a loud knock when i start and the same knock when the engine stops.The noise appears to be right at the back of the unit but i can`t pinpoint it exactly.Engine and drive have 130 hrs use. cheers jim

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Old 17 August 2008, 09:03   #2
Country: UK - Scotland
Town: Inverkip
Make: Redbay 11m Cabin
Length: 10m +
Engine: 2 x Yamaha422Sti 275
Join Date: Feb 2003
Posts: 567
Sounds like the drive plate mounts on the back of the flywheel or the Hardy spicer. Try putting the steering hard to port then starboard with the engine running and see if the noise changes if it does its probably the hardy spicer coupling, Yamaha in their wisdom have done away with the grease nipples on the new model. If it is only when you start/stop then its the drive plate mounts.

Hard or Soft it's never BIG enough
Andy Gee is offline   Reply With Quote
Old 17 August 2008, 13:57   #3
Country: UK - Scotland
Length: 10m +
Engine: 2x610hp jets
Join Date: Apr 2004
Posts: 74
had to change my rubber mounts on the drive thats attached to the fly wheel due to the knocking noise cost about 450 pounds for the parts i think .it was on a 420sti, oh and you helped too drew of course,
good luck in fixing it.
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Old 14 January 2015, 11:20   #4
Country: Brazil
Town: Santa Cruz do Sul
Boat name: Tordilha Negra
Make: Solara
Length: 7m +
Engine: inboard diesel
Join Date: Jan 2015
Posts: 1
Gasket Set


I need to buy the complete gasket set for Yamaha ME 372.

Do you know where I can buy it?

Thanks for help.

Best Regards.
pmateus is offline   Reply With Quote

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