View Full Version : What is the correct RPM at idle

05-08-2011, 10:00 PM
1995 Prostar 190
Indmar EFI w/throttle body
1:1 Hurth transmission

Been fighting a vacuum leak. Think the battle is won. Now RPM's have dropped to 660 at idle. Is that correct?

east tx skier
05-08-2011, 11:33 PM
Without checking the manual to be sure, if memory serves that's just about dead solid perfect.

05-09-2011, 09:10 AM
Guess the vacuum leak is really fixed then...

05-09-2011, 10:22 AM
660 at idle is per spec. :)

05-09-2011, 11:43 AM
Thanks. Found it in the Indmar manual "650 +/- 50 RPM." Guess that puts me very close.