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Author Topic:   MONTAUK 17, Honda 40-HP

grander posted 01-28-2010 01:21 AM ET (US)
I have a HONDA 40-HP motor on a 1988 Boston Whaler MONTAUK 17. The propeller is badly worn around the hub and I can't read the diameter and pitch. Tell me the right propeller to use in this application. Thanks, Greg
Tom W Clark posted 01-28-2010 10:49 AM ET (US)
Greg,
There can't be that many propellers to fit a Honda 40.
What is the WOT RPM range of your motor?
What is the gear ratio of your motor?
What was your top speed (as measured by GPS) and at what RPM did you see it with your old prop when it was in good shape?
With the answers to all of these questions, we can probably make some good recommendations.
grander posted 01-28-2010 12:03 PM ET (US)
Tom,
I will have to find the ansewers to these questions. I have not been able to run the boat yet. The prop is in bad condition. When I was buffing it with a wire wheel on my bench grinder about 1/2 in. of the tip of the blade broke off. Is there a prop that you think I can start with? I will try and find out the gear ratio and get back.
thanks,
Greg
Tom W Clark posted 01-28-2010 12:27 PM ET (US)
What year is your Honda 40?
Tom W Clark posted 01-28-2010 12:38 PM ET (US)
If your motor has the same 2.08: gear ratio as the current Honda 40 and also has the same WOT range of 5000-6000 RPM, and if the boat goes 25 MPH as Whaler literature suggests a Montauk with 40 HP will, then I recommend:
Aluminum: 10-7/8" x 11" Stiletto Ariva 3.5
Stainless Steel: 12" x 11" Stiletto Star 3.5
grander posted 01-28-2010 12:57 PM ET (US)
Tom,
The gear ratio is the same. and the specs you have gien are right-on. The boat has a 18 gallon fuel tank that is mounted under the helm seat and I would like to put a 20 gallon bait tank just behind the helm seat. Will this effect the size of the prop? or will the 10.78 be the better bet? the motor is a '95.
Thanks,
Greg
Tom W Clark posted 01-28-2010 01:05 PM ET (US)
The only reason to buy the aluminum prop is to save a little money.
Tom W Clark posted 01-28-2010 01:15 PM ET (US)
Honda does not make propellers themselves, they sell prop made by Solas, Precision Propellers (makers of the Stiletto and Turbo brands), PowerTech and even one propeller from Mercury.
Looking at their catalog, they offer a "Turbo" in an 11-3/4" x 11" size. That might be a good fit too.
I've been favorably impressed with Solas four blade aluminum props on small Hondas. There is an 11-1/8" x 11 Solas four blade in the catalog as well.
Depending on how fast your boat goes, you may have to down or up one inch of itch to get it perfect. It's going to be tough to peg a recommendation without knowing the potential top speed of you boat.
http://marine.honda.com/pdf/accessories/ml.rerap45a.MAC_Propellers.pdf
grander posted 01-28-2010 08:49 PM ET (US)
Thanks so much Tom. I think you have given me enough info to start my search for a prop that will work.
Greg
Peter posted 01-29-2010 07:24 AM ET (US)
For that rig, I wouldn't bother spending the extra money on a stainless steel propeller.
Tom W Clark posted 01-29-2010 11:03 AM ET (US)
If you keep the boat for more than a few years, a stainless steel prop will pay for itself.
The current prop is in bad shape for a reason. In a few years you could replace an aluminum prop two or three times while a stainless steel prop will still be like new.
If you do buy an aluminum prop and find that it is a good fit, or after you exchange it for one that is, go ahead and buy a second one as a spare...you'll need it.
weekendwarrior posted 01-29-2010 04:07 PM ET (US)
I have a Honda 50HP on a 1996 Montauk 17. The aluminum prop that came with my motor is just about perfect and I suspect you will have similar results. With an empty boat it could use more pitch, but with a load (my typical use case) it is perfect. Top speed is just over 30mph with the boat empty, at 6000rpm. I will try to remember to go out and read it when I get home. I have been using the same aluminum prop since I bought the motor new in 1999 and it is holding up fine, with year round use. It is whatever prop Honda bundled with the motor when it was new. I posted the size on here in the past in case you have time to search before I post back with the size..
grander posted 01-29-2010 09:23 PM ET (US)
I would like to know the specs on your prop. Although, your engine has ten more ponies. If I can cruise around 19-20 knts, I will be happy.
Greg
weekendwarrior posted 02-01-2010 03:10 PM ET (US)
The prop that came with my 50hp Honda is marked 11 1/4 x 13.

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Author	Topic: MONTAUK 17, Honda 40-HP
grander	posted 01-28-2010 01:21 AM ET (US) I have a HONDA 40-HP motor on a 1988 Boston Whaler MONTAUK 17. The propeller is badly worn around the hub and I can't read the diameter and pitch. Tell me the right propeller to use in this application. Thanks, Greg
Tom W Clark	posted 01-28-2010 10:49 AM ET (US) Greg, There can't be that many propellers to fit a Honda 40. What is the WOT RPM range of your motor? What is the gear ratio of your motor? What was your top speed (as measured by GPS) and at what RPM did you see it with your old prop when it was in good shape? With the answers to all of these questions, we can probably make some good recommendations.
grander	posted 01-28-2010 12:03 PM ET (US) Tom, I will have to find the ansewers to these questions. I have not been able to run the boat yet. The prop is in bad condition. When I was buffing it with a wire wheel on my bench grinder about 1/2 in. of the tip of the blade broke off. Is there a prop that you think I can start with? I will try and find out the gear ratio and get back. thanks, Greg
Tom W Clark	posted 01-28-2010 12:27 PM ET (US) What year is your Honda 40?
Tom W Clark	posted 01-28-2010 12:38 PM ET (US) If your motor has the same 2.08: gear ratio as the current Honda 40 and also has the same WOT range of 5000-6000 RPM, and if the boat goes 25 MPH as Whaler literature suggests a Montauk with 40 HP will, then I recommend: Aluminum: 10-7/8" x 11" Stiletto Ariva 3.5 Stainless Steel: 12" x 11" Stiletto Star 3.5
grander	posted 01-28-2010 12:57 PM ET (US) Tom, The gear ratio is the same. and the specs you have gien are right-on. The boat has a 18 gallon fuel tank that is mounted under the helm seat and I would like to put a 20 gallon bait tank just behind the helm seat. Will this effect the size of the prop? or will the 10.78 be the better bet? the motor is a '95. Thanks, Greg
Tom W Clark	posted 01-28-2010 01:05 PM ET (US) The only reason to buy the aluminum prop is to save a little money.
Tom W Clark	posted 01-28-2010 01:15 PM ET (US) Honda does not make propellers themselves, they sell prop made by Solas, Precision Propellers (makers of the Stiletto and Turbo brands), PowerTech and even one propeller from Mercury. Looking at their catalog, they offer a "Turbo" in an 11-3/4" x 11" size. That might be a good fit too. I've been favorably impressed with Solas four blade aluminum props on small Hondas. There is an 11-1/8" x 11 Solas four blade in the catalog as well. Depending on how fast your boat goes, you may have to down or up one inch of itch to get it perfect. It's going to be tough to peg a recommendation without knowing the potential top speed of you boat. http://marine.honda.com/pdf/accessories/ml.rerap45a.MAC_Propellers.pdf
grander	posted 01-28-2010 08:49 PM ET (US) Thanks so much Tom. I think you have given me enough info to start my search for a prop that will work. Greg
Peter	posted 01-29-2010 07:24 AM ET (US) For that rig, I wouldn't bother spending the extra money on a stainless steel propeller.
Tom W Clark	posted 01-29-2010 11:03 AM ET (US) If you keep the boat for more than a few years, a stainless steel prop will pay for itself. The current prop is in bad shape for a reason. In a few years you could replace an aluminum prop two or three times while a stainless steel prop will still be like new. If you do buy an aluminum prop and find that it is a good fit, or after you exchange it for one that is, go ahead and buy a second one as a spare...you'll need it.
weekendwarrior	posted 01-29-2010 04:07 PM ET (US) I have a Honda 50HP on a 1996 Montauk 17. The aluminum prop that came with my motor is just about perfect and I suspect you will have similar results. With an empty boat it could use more pitch, but with a load (my typical use case) it is perfect. Top speed is just over 30mph with the boat empty, at 6000rpm. I will try to remember to go out and read it when I get home. I have been using the same aluminum prop since I bought the motor new in 1999 and it is holding up fine, with year round use. It is whatever prop Honda bundled with the motor when it was new. I posted the size on here in the past in case you have time to search before I post back with the size..
grander	posted 01-29-2010 09:23 PM ET (US) I would like to know the specs on your prop. Although, your engine has ten more ponies. If I can cruise around 19-20 knts, I will be happy. Greg
weekendwarrior	posted 02-01-2010 03:10 PM ET (US) The prop that came with my 50hp Honda is marked 11 1/4 x 13.