bigger carb = more hp
Hi Sumner...I was told the same thing at the St. Pete boatshow this year. Bigger bore and bigger jets equal 4,5 or 6 hp depending upon your needs. Same power head on all of these for the Tohatsu-Nissan-Mercury line. We only need 4hp on our lake but in retrospec I wish I had paid the extra for the 5hp version. I still have some confusion on which jets and what size are used on the carbeurators. As pointed out in a earlier post the "slow jet" and "pilot jet" are the same item. At the boatshow a tech for mercury showed me that idle problems are often associated with the jet under the brass plug and that is not the same but appears to have an influence on the idle circuit.
Hi Sumner...I was told the same thing at the St. Pete boatshow this year. Bigger bore and bigger jets equal 4,5 or 6 hp depending upon your needs. Same power head on all of these for the Tohatsu-Nissan-Mercury line. We only need 4hp on our lake but in retrospec I wish I had paid the extra for the 5hp version. I still have some confusion on which jets and what size are used on the carbeurators. As pointed out in a earlier post the "slow jet" and "pilot jet" are the same item. At the boatshow a tech for mercury showed me that idle problems are often associated with the jet under the brass plug and that is not the same but appears to have an influence on the idle circuit.