Hey guys,
I brought a used 2010 Tahoe Q7I SSI with a Mercruiser 5.0L MPI (260HP) Alpha One, Drive Gear 1:47 that was neglected. I had it serviced at an authorized Tahoe dealer, I had them do a full service (impellor, oil change, spark plugs, computer, etc) including compression check. Everything checked out 100% they even said the computer reported only 24hours of use.
Before service and since service it getting low RPM and low Speed. The factory prop is a Mercury (Diameter 14 - 1/4", Pitch 21 3 Blade (Model832832A45 21P) ? Aluminum) and only getting 3900RPM and 41MPH on GPS. I posted in the Mercruiser and Prop forums and getting mixed results, some say engine and some say prop. Since them I also tested 3 other props see below for results.
I wanted to reach out to other Tahoe owners and get their personal experience. Any input would be helpful as I am at a loss on which direction to turn.
Thanks in advance.
Prop 1 (Original prop) Diameter 14 - 1/4", Pitch 21 3 Blade (Model832832A45 21P) - Aluminum
41 MPH (GPS) at WOT with 3900 RPM
Prop 2 (Test prop) Diameter 14 - 3/4", Pitch 18 3 Blade -SS
47 MPH (GPS) at WOT with 4500 RPM
- Better Hole Shot
Prop 3 (Test prop) Diameter 14 - 1/4", Pitch 16 4 Blade -SS
46 MPH (GPS) at WOT with 4600 RPM
- Great Hole Shot
Prop 4 (Test Prop) Diameter 14 - 1/4", Pitch 15 4 Blade -SS
44 MPH (GPS) at WOT with 4900 RPM
- Best Hole Shot yet. Really jumps out of the water.
Q7I SSI Specs
2010 Q7I SSI, Length 20'6" Beam 96" 45Gal Fuel Tank, Dry Weight 3031 lbs.
I brought a used 2010 Tahoe Q7I SSI with a Mercruiser 5.0L MPI (260HP) Alpha One, Drive Gear 1:47 that was neglected. I had it serviced at an authorized Tahoe dealer, I had them do a full service (impellor, oil change, spark plugs, computer, etc) including compression check. Everything checked out 100% they even said the computer reported only 24hours of use.
Before service and since service it getting low RPM and low Speed. The factory prop is a Mercury (Diameter 14 - 1/4", Pitch 21 3 Blade (Model832832A45 21P) ? Aluminum) and only getting 3900RPM and 41MPH on GPS. I posted in the Mercruiser and Prop forums and getting mixed results, some say engine and some say prop. Since them I also tested 3 other props see below for results.
I wanted to reach out to other Tahoe owners and get their personal experience. Any input would be helpful as I am at a loss on which direction to turn.
Thanks in advance.
Prop 1 (Original prop) Diameter 14 - 1/4", Pitch 21 3 Blade (Model832832A45 21P) - Aluminum
41 MPH (GPS) at WOT with 3900 RPM
Prop 2 (Test prop) Diameter 14 - 3/4", Pitch 18 3 Blade -SS
47 MPH (GPS) at WOT with 4500 RPM
- Better Hole Shot
Prop 3 (Test prop) Diameter 14 - 1/4", Pitch 16 4 Blade -SS
46 MPH (GPS) at WOT with 4600 RPM
- Great Hole Shot
Prop 4 (Test Prop) Diameter 14 - 1/4", Pitch 15 4 Blade -SS
44 MPH (GPS) at WOT with 4900 RPM
- Best Hole Shot yet. Really jumps out of the water.
Q7I SSI Specs
2010 Q7I SSI, Length 20'6" Beam 96" 45Gal Fuel Tank, Dry Weight 3031 lbs.