Ford 302 5.0 H.0. Carburetor omc Cobra stern drive outboard best prop

[NewbieAtownsam]

Looking for help on the best prop for my boat! I have 1994 chaparral 2130! Currently I have a 14 1/2 x 19 but it looks beat! The boat runs slow and hard to plain! Called a marina and told them and they said to lower my pitch to 17! My friend gave me a omc 15x17 prop would this be a a good idea?

 

[Scott06]

Looking for help on the best prop for my boat! I have 1994 chaparral 2130! Currently I have a 14 1/2 x 19 but it looks beat! The boat runs slow and hard to plain! Called a marina and told them and they said to lower my pitch to 17! My friend gave me a omc 15x17 prop would this be a a good idea?

yes if you want to improve planning performance yes drop in pitch. How does your current WOT rpm compare to what the engine is rated for?

Is the engine in a good state of tune ?

 

[NewbieAtownsam]

Im not sure! It’s a totally rebuilt motor with 40 hours on it! Not sure what the rpm’s should be at wot?

 

[NewbieAtownsam]

Im not sure! It’s a totally rebuilt motor with 40 hours on it! Not sure what the rpm’s should be at wot?

I have a Ford 302 long block 5.0 high output carbureted engine!

 

[Scott06]

I have a Ford 302 long block 5.0 high output carbureted engine!

Probably somewhere around 4600-4800 rpm , what do you currently get with current prop? Need to have a starting off point for recommendations

 

[NewbieAtownsam]

I’m not sure just ran like crap! Changed it to 15x17 prop from the 14 1/2 x 19 which was pretty used looking! Haven’t got to run it yet! Just want to be safe what to look for range wot when I do run it! Seen a graph for omc 5.0 which would be similar to mine I believe saying 4200-4600 rpm

 

[NewbieAtownsam]

I’m not sure just ran like crap! Changed it to 15x17 prop from the 14 1/2 x 19 which was pretty used looking! Haven’t got to run it yet! Just want to be safe what to look for range wot when I do run it! Seen a graph for omc 5.0 which would be similar to mine I believe saying 4200-4600 rpm

 

[Scott06]

Yeah those are typical rpm ranges. The older ones seemed to have lower wot than later ones With GT40 heads etc. im not a ford expert but general rule of thumb for stockish V8 s keep it under 5 k and it will live…

 

[NewbieAtownsam]

I believe I have 1991 Ford 302

Yeah those are typical rpm ranges. The older ones seemed to have lower wot than later ones With GT40 heads etc. im not a ford expert but general rule of thumb for stockish V8 s keep it under 5 k and it will live…

sound’s good man thanks! Wot under 5,000rpm to be safe! Thanks