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Jet Boats
General Jet Boat Discussions
Mercury 60/40 4 Stroke 4800 RPM WOT right?
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<blockquote data-quote="BigTerp" data-source="post: 417844" data-attributes="member: 9169"><p>Just for reference I get around 5200-5300 with my Johnson 50/35 on a 1648MV. When loaded properly it tops out about 26-28 down river. My boat is pretty light though with a probably .080" hull or even less. It does run a bit better in the cooler times of year, but nothing significant and no difference in RPM's that I've noticed. IIRC, I did loose a few RPM's when I switched from an aluminum to stainless impeller. What does your manual say for WOT RPM's? Mine is supposed to fall between 4500-5500. One simple thing to check is your reverse gate. Make sure it is fully locked down when you throttle past neutral. If it doesn't that could knock your RPM's down, although I'd imagine more significant than 4800.</p></blockquote><p></p>
[QUOTE="BigTerp, post: 417844, member: 9169"] Just for reference I get around 5200-5300 with my Johnson 50/35 on a 1648MV. When loaded properly it tops out about 26-28 down river. My boat is pretty light though with a probably .080" hull or even less. It does run a bit better in the cooler times of year, but nothing significant and no difference in RPM's that I've noticed. IIRC, I did loose a few RPM's when I switched from an aluminum to stainless impeller. What does your manual say for WOT RPM's? Mine is supposed to fall between 4500-5500. One simple thing to check is your reverse gate. Make sure it is fully locked down when you throttle past neutral. If it doesn't that could knock your RPM's down, although I'd imagine more significant than 4800. [/QUOTE]
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Jet Boats
General Jet Boat Discussions
Mercury 60/40 4 Stroke 4800 RPM WOT right?
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