Sort of kind of. I have an Atomic 4 and it is rated at 30 HP at *3600* RPM. The only boats getting close to 3600 RPM are either planing hulls or have a reduction gear, which most of them do not. Mine is direct drive and maxes out at about 2400-2500 RPM. It is about a 22-25 HP engine in most applications. Running under power next to a 34 with the 18 HP diesel I was definitely faster, but I am pretty sure a 25 HP diesel with a reduction gear would beat an Atomic 4 in a race.
Joe Coquina From: Matthew [mailto:wolf...@erie.net] Sent: Tuesday, February 16, 2021 3:24 PM To: 'Stus-List' <cnc-list@cnc-list.com> Cc: Della Barba, Joe <joe.della.ba...@ssa.gov> Subject: [EXTERNAL] RE: Stus-List Re: C&C 34 re-power HP As I recall the A4 on my sistership was rated about 30 HP. From: Della Barba, Joe via CnC-List <cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> Sent: Tuesday, February 16, 2021 3:21 PM To: Stus-List <cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> Cc: Della Barba, Joe <joe.della.ba...@ssa.gov<mailto:joe.della.ba...@ssa.gov>> Subject: Stus-List Re: C&C 34 re-power HP If you want to battle headwinds and seas I would use more than the 20 HP engine. Depending on your budget and space the 25 or 30 would both be good choices. The 34 I used to sail on had a 2 cylinder Yanmar that was 18 HP (I think) and shook the entire boat. It was by no means overpowered. 3 cylinders = less vibration and more power. Joe Coquina C&C 35 MK I 4 cylinders
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