Thread: Not getting listed max rpm

Took the toon out fishing yesterday an noticed I'm not getting the listed max rpm of 6k plate says it should idle at 725 but it's at 850 and this is max rpm I'm getting


Motor info




I did full maintenance 2 weeks ago only thing I did not change was thermostat and the flywheel belt..

And prop info
Attachment 423671

May be over propped a bit. Unless you were getting max rpms before the tune up

Originally Posted by DockShootinJack

May be over propped a bit. Unless you were getting max rpms before the tune up

Don't know what it was before only ran it couple of times when I got it 3 yeas ago . Then I got a severe head injury this is really first time that I'm going thru it.
I'm getting 2 different prop recommendations mercury says to run it with a 14inch 13 pitch. Solas says 13.75in 11 pitch so don't know

I can't open the attachment that says prop information. Is the Mercury recommended prop less pitch than your current one?

This is my current prop only. 25 in diameter bigger same pitch as mercury recommended. So how much pitch to go down to get that 1k higher you think

Ok its a 20 foot crest pontoon plate says max hp is 70hp. i have a 2004 60hp bigfoot motor. As far as weight just 1 12gal fuel tank , 3 batteries,toon alone is 1725lb motor is 225lb,and me 212lb and some fishing gear when i did the water test..

Originally Posted by lawless

Ok its a 20 foot crest pontoon plate says max hp is 70hp. i have a 2004 60hp bigfoot motor. As far as weight just 1 12gal fuel tank , 3 batteries,toon alone is 1725lb motor is 225lb,and me 212lb and some fishing gear when i did the water test..

O.k., You're fine in the motor dept. Come down a bit in pitch and that will get your rpm's up, it may even get you a bit more top end due to being able to spin the prop at the right speed.

My 4 stroke 60 CommandThrust will reach 6000. I usually run it around 5000 rpm. I need to get a Stainless prop for it and move some weight around

Originally Posted by DockShootinJack

My 4 stroke 60 CommandThrust will reach 6000. I usually run it around 5000 rpm. I need to get a Stainless prop for it and move some weight around

Does having a SS prop really make a difference over aluminum