ANOTHER PROP/RPM QUESTION

[rwnla]

I have a 94 70 johnnyrude with a 13 x 19 prop. I only get 5200 rpms and was wondering from all of the other post if it would be worth the money to go down to a 17 pitch?

 

[nordy]

Re: ANOTHER PROP/RPM QUESTION

With 17 pitch engine speed will be increased with same boat speed.<br />So you may reach a higher top speed because engine power is maximum only at certain rpm.<br />You may get maximum boat speed only when engine runs with maximum power rpm.<br />But consider boat acceleration will decrease and fuel consumption we increase.<br /><br />Nordy from Germany

 

[ob15]

Re: ANOTHER PROP/RPM QUESTION

I would play around with the trim of the motor first. where is the AV plate located in relationship to the keel/bottom of the hull? You might be able to raise it a little. Also, you could adjust the trim a little. IF any of the above can be done, it should be better than getting a new prop. You will gain rpm and speed. With a new prop where the motor is set now will gain rpm but not speed<br /><br />Just my $.02. I'm kinda new here and I'm sure there will be others with more knowledge and great input.