mercruiser 5.7 prop issues

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mercruiser 5.7 prop issues #7619683 06/07/12 07:25 PM
Joined: Jun 2011 Posts: 307 Rockwall Texas G gmangh15 OP Angler
OP gmangh15 Angler G Joined: Jun 2011 Posts: 307 Rockwall Texas	what is the prop that is being used with this motor with an alpha one outdrive. Its a manta ray fish and ski 203. Its a 15 splined prop i just dont know the pitch. but it runs about 35 mph and i changed the spark plugs and no difference. Does that sound right for that big of motor or what?????

Re: mercruiser 5.7 prop issues [Re: gmangh15] #7620399 06/07/12 10:27 PM
Joined: Nov 2005 Posts: 4,061 San Marcos, Texas M Mike Halfmann the boatmann TFF Team Angler
Mike Halfmann the boatmann TFF Team Angler M Joined: Nov 2005 Posts: 4,061 San Marcos, Texas	About right for a 19P. Slower with a 17P, maybe around 27mph. On a light load, no skier, light boat, a 21P should run around 40-45mph. All this is providing you can get to the majic "WTO" Wide open Throttle at 4500RPM. My 26ft, 9500lb boat with a 17P runs around 25mph at 3250 Rpm. I've got the 5.7 Mercrusier. mike halfmann

Re: mercruiser 5.7 prop issues [Re: gmangh15] #8796701 04/06/13 10:08 PM
Joined: Jul 2009 Posts: 1,047 F fmclee Extreme Angler
fmclee Extreme Angler F Joined: Jul 2009 Posts: 1,047	Mine runs 43-45 with a 21p stainless. 4300 rpm. Same engine.

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