Page 5 of 5
Re: MV 34 - 4 blade props
Posted: Mon May 23, 2011 7:45 pm
by Charlie34E
I now have avout 100 hours on the new props--4blade for 75hp. Looks like I have picked up about 2 knots at about 3200 RPM. I can't tell if there is any difference in engine noise on the bridge. I have almost NO vibration at any speed. The boat was loaded, full enclosure on bridge and full tanks of water and fuel. I like them.
Re: MV 34 - 4 blade props
Posted: Tue May 24, 2011 11:02 am
by duetto
can you give us an idea of the speed that you're seeing now at 3200 rpms?
Re: MV 34 - 4 blade props
Posted: Sun May 29, 2011 3:03 pm
by Charlie34E
Trying to factor our current and wind, best I estimate is a solid 14kts. WOT deems to get me 16+knots. Best I had before was 14kts. I have hull 63 with 75's.
Re: MV 34 - 4 blade props
Posted: Fri Jun 24, 2011 8:05 pm
by Allezcat
Installed the new four blade props this week. Initial results are good. WOT gives 3850 RPM (100HP) and 19.9Kts. Cruising speeds are about .5 Kts higher (at the same RPM) and they seem smoother (subjective). Replaced the cutlass bearings also. They are model BITE. Cut the fiberglass housing back about 3/8". Was able to torque out the port bearing with a pipe wrench but not the starboard bearing. They were both epoxied in place (ugh!). Removed the starboard shaft, sawed thru the bearing, then crushed it inward and extracted it. Drilled and tapped new holes for the 4 bearing lock screws on each side as these were removed when the tube was cut back. The old cutlass bearings had 1050 hrs on them. There was approx 1/4" of radial play at the prop. With the new bearings installed there is approx 1/16" of radial play at the prop. My next challenge is to replace the engine raw water impellers (someday)! I actually had the starbd engine pump cover off but was unable to remove the impeller. I now have a special pair of bent pliers (Yanmar Impeller Puller) from Bay Shore Marine ($40) which I hope will do the job.
Chet
Allezcat II
MV096
Re: MV 34 - 4 blade props
Posted: Sat May 04, 2013 1:16 pm
by Semi-Local
Don't know if anyone is looking for a pair of spare 3-bladed props but Diana and I are looking to sell ours.
They came off our MV34 hull 88. We went to 4-blades and don't really want to carry these around with us anymore.
In good condition, definitely some nicks so they are fine as short-term backups or could be reconditioned for longer-term use.
Don't know what would be a fair price but we can figure that out together, as well as a drop-off location or shipping, if anyone is interested.
Best, Mark
mark@semi-local.com