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I have an 01, 225 ox 66 on a boat that I purchased a year ago and it started losing rpm and idling rough. I changed the plugs, and cleaned the o2 draw tube. I left the boat at a good Yamaha mechanic a few hrs away this past weekend for him to look at and he cleaned the VST and changed the filter. Some of the rpm have been restored but he didn't like the sound of it so he looked deeper and there is a head gasket gone. He's doing both and anything else he can find. I've been reading a lot on this forum about the 3 low pressure fuel pumps that the diaphragm often goes on these motors and that they are worth changing. Can any give me the part number so I can see the diagram of these and figure out what I need to get as I'd like to replace them this weekend.
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