I don't know mate - I have a perfect 175hp Suzuki just had 240 hour service and still purs like a kitten and runs probably as hard as your boat and as far as your boat but mine with a 240l tank and your with a 500l tank - that is one good reason for nice balanced outfit with an economical motor over 5 tonne of US plastic with a 300hp Yami screaming it's socks off and on fire - mate every time I see that avatar pic of yours I hope you get the thing put out before the plastic catches fire and you sink
Some may think I am being a bit harsh on Muddy - but anyone who suggests my 175 Suzzy would make a good anchor - shame shame
Ranga7 good call on the 175hp Suzuki a sweet motor