Logo
FULL SITE MENU

1988 Force 125hp Questions

M

madhatter1136

New member
Ok guys I just bought my first boat of my life which is a 1988 Bayliner Cobra 18ft. The boat has a Force 125 HP motor which as far as I can tell has been taken care of. The boat run great. I have had it out on the water 4 times now. My question is this. My motor RPMs is only 3500. My top speed is about 30mph. I have been told by someone that I need a new prop with a trim of 13" or 15"??? That should bring my RPMs up??? So not knowing any better I thought I would do some home work before spending the money. So here I am guys tell me what you think??? I would like to get some more speed out of the boat and I would like the boat to get up out the water a bit faster. Thank you guys for any help you can give me.

Also just a side note on the matter. I live about 5000 above sea level. I think I have a 19" prop now.
 
Last edited:
Re: 1988 Force 125 Questions

Hi There, we have a 88 cobra too - same boat - ours has a 15 pitch on it and runs really good - 19 would not be a good setup for that engine and gear ratio. with the 15 we can hit about 38 MPH at 5400 rpm. our boat is setup for pulling skiers. Don't get a 13 that would be too small and over rev the engine.
 

Attachments

  • cobra.JPG
    cobra.JPG
    37.1 KB · Views: 1,645
Re: 1988 Force 125 Questions

Hey we have the same boat I see you took your rear windows down also. Ok well I will find me a 15 for mine. Thanks
 
Re: 1988 Force 125 Questions

Yeah those windows were not the best idea ! Yeah the 15 should get you out of the water in about 3-4 seconds . Let me know if you get a good result !

take 'er easy
 
Back
Top