mainstream
New Member
- Jul 18, 2011
- 543
- Boat Info
- 2009 Sea Ray 350
Raymarine c120 classic
- Engines
- 8.1 Horizons
v drives
My 2009 350 has different props also it is common from factory
- Jan 26, 2008
- 2,839
- Boat Info
- SOLD 2005 420 DA w/T-8.1S Horizons
- Engines
- 2018 Sea Hunt 255se w/Yamaha 300hp
Ditto for me.
KayKook
New Member
Very common. that is the way they come from the factory on several SR models.
JimFromMD
Well-Known Member
- Aug 9, 2010
- 1,777
- Boat Info
- 2005 300DA, Garmin 740s w/Vision Charts and GMR18HD RADAR
- Engines
- 5.0MPI w/BIIs, Kohler 5E Generator.
Good to konw, but I wonder why they would do that?
KayKook
New Member
Sometimes it's because of slightly different gearing in the transmissions. Basically to get the most efficiency out of the power package in the boat.
mainstream
New Member
- Jul 18, 2011
- 543
- Boat Info
- 2009 Sea Ray 350
Raymarine c120 classic
- Engines
- 8.1 Horizons
v drives
This is the explanation to your question from a searay review
EXTRA POINT: To prevent crabbing and counteract the effect of counter-rotating transmissions, Sea Ray installs props with slightly different pitches (20" and 20.5").
Zephyr
New Member
Hi,
I had the same findings when I last hauled out when I saw the different sizes I though soemthing was a bit suss.
I discovered by accident the reason why when I was going through the mountain of paperwork that comes with the boat. The two propellers have test certificates showing the exact measurements of each prop - as it turns out my 18x21 & 18x21.5 stamped props have nearly exactly the same dimensions (values compared on the test certificates) - so they are a matched pair.
Z.
I had the same findings when I last hauled out when I saw the different sizes I though soemthing was a bit suss.
I discovered by accident the reason why when I was going through the mountain of paperwork that comes with the boat. The two propellers have test certificates showing the exact measurements of each prop - as it turns out my 18x21 & 18x21.5 stamped props have nearly exactly the same dimensions (values compared on the test certificates) - so they are a matched pair.
Z.
