I re-powered my 2000 Outrage 21 with a Honda 250-HP outboard.
GIve me a propeller recommendation.
The engine is mounted [please describe the engine mounting height as explained in the article Engine Mounting Height. Do not attempt to describe the location of particular hole in the engine mounting bracket.--jimh]
I have no performance data.
There are three Group-24 batteries for the trolling motor for a total of five batteries.
The Honda calculator recommended a three-bladed SOLAS LEXOR propeller, 15.25-inch by 19-pitch, based on data entry:
Dry weigh = 3000-lbs
Gear Weight = 1000-lbs
Fuel Volume = 125-gallons
Motor weight (added automatically) = 622-lbs.
2000 Outrage 21 HONDA 250
Re: 2000 Outrage 21 HONDA 250
[The engine is mounted] on the [please describe the engine mounting height as explained in the article Engine Mounting Height". Do not attempt to describe the location of particular hole in the engine mounting bracket.--jimh]
The propeller that was used on the previous engine is a 15-inch by 17-pitch.
The previous engine was a 200-HP OptiMax.
The propeller that was used on the previous engine is a 15-inch by 17-pitch.
The previous engine was a 200-HP OptiMax.
Re: 2000 Outrage 21 HONDA 250
Please describe the engine mounting height as explained in the article Engine Mounting Height". Do not attempt to describe the location of particular hole in the engine mounting bracket. Read the linked article and reply with one of these possibilities:
What is the gear ratio of the HONDA 250?
What is the maximum engine speed recommended for that engine by HONDA?
Do you have ANY data about the boat speed at a particular engine speed with the new HONDA 250 engine?
Do you have ANY data about top boat speed with the 200-HP engine?
- lowest possible mounting height
- one-hole up from lowest
- two holes up from lowest
- three holes up from lowest
- four holes up from lowest
What is the gear ratio of the HONDA 250?
What is the maximum engine speed recommended for that engine by HONDA?
Do you have ANY data about the boat speed at a particular engine speed with the new HONDA 250 engine?
Do you have ANY data about top boat speed with the 200-HP engine?
Re: 2000 Outrage 21 HONDA 250
Propeller selection is part science and part art.
Key elements are
Recommendations for the BF 250 installed on Boston Whaler's include:
Key elements are
- the lower unit gear ratio,
- engine wide-open throttle (WOT),
- and target WOT speed
Recommendations for the BF 250 installed on Boston Whaler's include:
- 17-pitch MIRAGEplus at two-hole-up mounting
18-pitch Enertia
17-pitch REVOLUTION4
1992 Outrage 17
2019 E-TEC 90
2018 LoadRite 18280096VT
Member since 2003
2019 E-TEC 90
2018 LoadRite 18280096VT
Member since 2003
Re: 2000 Outrage 21 HONDA 250
[The engine mounting height is] the lowest mounting possible.
The engine type is a HONDA BF250.
The maximum engine speed is 6,300-RPM.
The engine type is a HONDA BF250.
The maximum engine speed is 6,300-RPM.
Re: 2000 Outrage 21 HONDA 250
I would use your current propeller, if that propeller will fit. Then go from there.
I would raise the engine to a two-holes-up from lowest mounting.
I would raise the engine to a two-holes-up from lowest mounting.
On my 24th Whaler. Currently in the stable: 86 18' Outrage, 81 13' Sport(original owner), 87 11' Sport, 69 Squall(for sale cheap).
Re: 2000 Outrage 21 HONDA 250
Using the Crouch method for speed prediction and these inputs:
Using a propeller calculator with input
I think starting with a Mercury MIRAGEplus 17-pitch three-blade propeller is a good suggestion.
- LBS = 4750 (from data supplied by the OP)
HP =250
Hull Factor = 190 (typical for a fast Boston Whaler moderate V-hull boat)
Using a propeller calculator with input
- RPM = 6000
RATIO = 2
SLIP = 10
MPH = 44 (i.e., the predicted top speed possible)
I think starting with a Mercury MIRAGEplus 17-pitch three-blade propeller is a good suggestion.
Re: 2000 Outrage 21 HONDA 250
The second recommendation for the MIRAGEplus propeller came from:
http://continuouswave.com/ubb/Forum4/HTML/007768.html
Scroll down about two-thirds through the thread.
http://continuouswave.com/ubb/Forum4/HTML/007768.html
Scroll down about two-thirds through the thread.
1992 Outrage 17
2019 E-TEC 90
2018 LoadRite 18280096VT
Member since 2003
2019 E-TEC 90
2018 LoadRite 18280096VT
Member since 2003
Re: 2000 Outrage 21 HONDA 250
The Honda 250 has a 2:1 gear ratio and a 5300 to 6300 RPM [full-throttle] operating range. The suggested operating range is 2,500 to 4,500-RPM. I rarely run my 2013 250 Honda above 4,500-RPM as the fuel mileage drops off appreciably above that.
I would think you could turn a 21" pitch. I'm running a 15.25 x 17-pitch four-blade on my 1993 23 Walkaround. Engine speed at full-throttle is 5,800-RPM.
A lot more boat at length 23-feet 9-inches, dry weight 4400, fuel capacity 150 (about 1000-lbs), and gear weight around 1000-lbs. And the boat has a T-Top.
A Powertech OFS4 15.25 x 17 four-blade propeller gives top speed 39 to 40 [MPH] at 5800-RPM. The boat jumps on plane. Fuel mileage 2.3 to 3.0 MPG across operating speed of 12 to 28-MPH and about 3300- to 4500-RPM.
A Yamaha 17-pitch three-blade stainless (I think it was a saltwater series 2) gave top boat speed of 41 to 42 [MPH] at 6300-RPM. Planing time was decent. To hold plane is harder than with [the OFS4] four-blade propeller. Fuel mileage was around 2.5-MPG
Running a 15.25 x 19 Solas three-blade the top speed was 40 to 41]MPH at 5400-RPM. [The acceleration from a standing start was], doggy. Fuel mileage was less than 2.5-MPG. The boat tended to fall off plane at slower speeds.
I would think you could turn a 21" pitch. I'm running a 15.25 x 17-pitch four-blade on my 1993 23 Walkaround. Engine speed at full-throttle is 5,800-RPM.
A lot more boat at length 23-feet 9-inches, dry weight 4400, fuel capacity 150 (about 1000-lbs), and gear weight around 1000-lbs. And the boat has a T-Top.
A Powertech OFS4 15.25 x 17 four-blade propeller gives top speed 39 to 40 [MPH] at 5800-RPM. The boat jumps on plane. Fuel mileage 2.3 to 3.0 MPG across operating speed of 12 to 28-MPH and about 3300- to 4500-RPM.
A Yamaha 17-pitch three-blade stainless (I think it was a saltwater series 2) gave top boat speed of 41 to 42 [MPH] at 6300-RPM. Planing time was decent. To hold plane is harder than with [the OFS4] four-blade propeller. Fuel mileage was around 2.5-MPG
Running a 15.25 x 19 Solas three-blade the top speed was 40 to 41]MPH at 5400-RPM. [The acceleration from a standing start was], doggy. Fuel mileage was less than 2.5-MPG. The boat tended to fall off plane at slower speeds.
Re: 2000 Outrage 21 HONDA 250
I would stick with a 17" Mirage as it is a more aggressive prop than others. The suggestion to run a 21 would not work. 4 strokes like to be propped at the higher bad of the redline, not lower or else you will have planning problems and poor economy as sited above. The old mindset that running lower rpms means better economy does not work on modern engines. Some engines will get very close in MPG over a pretty long range of cruise speeds. Again, I think using your old prop would be a good start.
On my 24th Whaler. Currently in the stable: 86 18' Outrage, 81 13' Sport(original owner), 87 11' Sport, 69 Squall(for sale cheap).
Re: 2000 Outrage 21 HONDA 250
Thank you for all the suggestions.