View Full Version : 1989 Prostar 190, 351 max RPM??

04-15-2009, 04:47 PM
I have a 1989 prostar with indmar ford 351, powerslot tranny, stock propeller. Whats the max RPM i should get on the engine??

04-15-2009, 04:56 PM
should spin close to 5K.

04-15-2009, 06:33 PM
According to my '89 Owners Manual, owners papers, 4200 to 4400 rpm WOT depending on the prop. Same for PowerSlot and non PowerSlot.

04-16-2009, 03:35 AM
Good stuff, thank you guys!

04-16-2009, 09:54 AM
Yup, 4400 is the max recommended RPM for the base 240hp 351w. I believe that recommendation is more based on the max power than it does on the strength of the internal components- the HO version has the same bottom end and is recommended to run up to 4800 RPM. I turn my stock bottom ended 351w up to 5200 and dont give it a second thought. Back when it was still the base 240hp, I turned it 4600 and picked up holeshot and top end with an Acme prop, so I would say its plenty safe to turn it a little higher than the manufacturer's recommendation.