Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Cummins 5.9 Performance questions
#3
How was the bottom of the boat?? Clean and good running gear? A fouled bottom or gear will cost you a couple hundred rpm in a heartbeat. If everything was clean then I would suspect It to be overproped.
If overproped I would worry a little because that has probably been going on for a long time. I would have the engines checked out thoroughly ( but I would to that anyway, it saved me from spending $100k on my current boat).
If the bottom wasn't clean, have it cleaned and rerun it.
Sans Peur 2003 Tiara 50 Open
Reply


Messages In This Thread
RE: Cummins 5.9 Performance questions - by Sans Peur - 09-12-2021, 12:27 PM

Possibly Related Threads…
Thread Author Replies Views Last Post
  Blown Valve Seat on a my starboard 2005 Cummins 6CTA8.3L-480CE with only 1061 hours Another Tradition 1 995 07-29-2026, 02:41 PM
Last Post: hiccup
  Tiara 4000 Express Cummins 6CTA 8.3 In-Frame Engine Rebuild Jack Aperio 3 2,993 05-23-2026, 03:27 PM
Last Post: Capt. Paul
  [Tiara Open] Cummins 6BTA 5.9 Diamond Series Engines Fishy_Business 2 1,260 12-12-2025, 12:02 PM
Last Post: Fishy_Business
  2007 3600 Open QSB 5.9 380 hp Propeller and Engine Performance Test today Roweje 1 1,374 08-06-2025, 09:41 AM
Last Post: Sapphire
  Cummins 6CTA 8.3 Engine Rebuild - Additional Photos Jack Aperio 3 2,514 07-08-2025, 09:41 AM
Last Post: hiccup



Users browsing this thread: 1 Guest(s)
Advertisements

Latest Threads
Hot Engine Room
Last Post: Nelsond
Yesterday 11:36 AM
» Replies: 0
» Views: 25
Anyone using a cordless robot on a Tiara...
Last Post: thomasbrown
11-03-2026 05:08 PM
» Replies: 0
» Views: 41
Anyone using a cordless pool cleaner wit...
Last Post: hiccup
11-02-2026 01:18 PM
» Replies: 1
» Views: 64
Replacing the head on a Tiara 3100 — do ...
Last Post: hiccup
11-02-2026 01:17 PM
» Replies: 1
» Views: 52
89 3100 convertable
Last Post: hiccup
10-30-2026 06:13 PM
» Replies: 2
» Views: 962