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#1
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Alum to SS Prop question
Greetings,
Have a '97 Chap 2500lb / 4.3 Mercruiser engine. Run 4900 WOT trimmed up and that is where porpoising starts. I would like to replace the alum 23' with a SS. Do I drop to a 21' SS or stay w/ 23'? Have heard both. Thanks in advance, -Jay. |
#2
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Alum to SS Prop question
Drop to a 21 if hole shot is important to you. Stay with 23 is cruising
economy is more important. -W "Jay" wrote in message m... Greetings, Have a '97 Chap 2500lb / 4.3 Mercruiser engine. Run 4900 WOT trimmed up and that is where porpoising starts. I would like to replace the alum 23' with a SS. Do I drop to a 21' SS or stay w/ 23'? Have heard both. Thanks in advance, -Jay. |
#3
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Alum to SS Prop question
Stay with the 23. RPMs will not change (no more than 50 rpms anyway).
You are already over rated rpms (4800) so going to a 21 is going to be way to small. If you get a good performance SS like the Laser II the SS will help tremendously w/ this problem. A standard black SS will have little to no effect. -- Tony My boats and autos - http://t.thomas.home.mchsi.com "Jay" wrote in message m... Greetings, Have a '97 Chap 2500lb / 4.3 Mercruiser engine. Run 4900 WOT trimmed up and that is where porpoising starts. I would like to replace the alum 23' with a SS. Do I drop to a 21' SS or stay w/ 23'? Have heard both. Thanks in advance, -Jay. |
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