28 ft CD powerboat

[Louis Ferunden]

My friend has a 28 ft CD powerboat with a single engine. He wants to know if anyone has had any luck changing the prop to get more speed.



LFerunden@AOL.com

[Jack]

My friend has a 28 ft CD powerboat with a single engine. He wants to know if anyone has had any luck changing the prop to get more speed.

Unless someone has put on a non-standard prop you will make no speed improvement by changing the prop. If the boat has the 200hp Volvo, has a clean prop and clean bottom, it should turn approximately 3900 rpm wide open underway. If this is not the case, have a mechanic check the engine and also check that it has the prop recommended by CD.

Jack



k4ink@pamlico.net

[FRANK]

My friend has a 28 ft CD powerboat with a single engine. He wants to know if anyone has had any luck changing the prop to get more speed.

Unless someone has put on a non-standard prop you will make no speed improvement by changing the prop. If the boat has the 200hp Volvo, has a clean prop and clean bottom, it should turn approximately 3900 rpm wide open underway. If this is not the case, have a mechanic check the engine and also check that it has the prop recommended by CD.

Jack

Does anyone know what prop the boat would have with the 165 VOLVO and what the WOT RPM is?

Thanks
Frank HUNKY DORY



ccmlake@msn.com

[Ron Matheson]

My friend has a 28 ft CD powerboat with a single engine. He wants to know if anyone has had any luck changing the prop to get more speed.

Hi Louis
My Cape Dory 28 gas came with a 18/18 pitch prop. It wowld not reach full r.p.m's, I changed the pitch to 18/17, that worked. I Changed the motor this year it has 325 hp. the only change to the 18/17 prop was to cup it. The boat cruises at 16 m.p.h and tops out at 23. Ron



ronpam@dellnet.com