Is it a four stroke or two stroke? Stainless prop? My 20 with a four stroke F115 get's about 5800-2000 depending on load with a 15 pitch aluminum prop. If you have a 17 pitch stainless, that sounds close to what I might get. Some of the other guys are better than me with props here but they will want to know 2/4 stroke, prop material, brand and where your cav plate is in relation to the bottom of the boat. How much extra weight, fuel, etc. will make a difference also. The four stroke should tach out at close to 6000 when you are fully loaded.
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