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I am trying to determine the correct propeller spline and
I am trying to determine the correct propeller spline and pitch for my 2003 70 hp, 4 stroke outboard motor. The motor is currently on a 23 foot pontoon. Can you help me? … read more
Jason
Jason
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Vocational, Technical or Trade School
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Have a new ranger pontoon with 90 hp 2020 4 stroke only
Have a new ranger pontoon with 90 hp 2020 4 stroke only reaches 20 mph and 5200 rpm it's a 20 ft pontoon total length 21 11 … read more
Jason
Jason
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Vocational, Technical or Trade School
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Just bought a 2019 40 hp Merc 3 cylinder. Have it on a 15
Just bought a 2019 40 hp Merc 3 cylinder. Have it on a 15 foot gillgetter pontoon. The 20 hp 4 stroke i replaced had a top speed of 12- 13 mph. I put a 4 blade 10.6 inch by 12 pitch prop on 1st. Good … read more
Ted G.
Ted G.
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Vocational, Technical or Trade Scho
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Motor will run fine, I'll stop and restart and all is good.
Motor will run fine, I'll stop and restart and all is good. After about 3 start attempts, motor will stall and cannot restart. After a few hours motor will restart with same same problem stated above.… read more
Charles
Charles
Certified Mercury Tech
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Need some advice on a pontoon boat prop. I have a 2015
Hi! Need some advice on a pontoon boat prop. I have a 2015 sylvan s3 pontoon with a 150 mercury 4 stroke engine. My wot is 4300 with a 3 blade aluminum 15.25 x15 prop. max speed 29 MPH. I know the max… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
what is the recommended rpm range for my 2003 Mercury 40 HSP
what is the recommended rpm range for my 2003 Mercury 40 HSP 2 stroke, I have this motor on a 22 foot pontoon and was informed to get proper performance under load I need to know recommended rpm under… read more
Noel Schembri
Noel Schembri
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2009 Honda Outboard 200 4 stroke. Repowered a Tracker Marine
2009 Honda Outboard 200 4 stroke. Repowered a Tracker Marine 25FT Tritoon with this motor. The motor came with a 4 Blade 14 /14 x 17R Prop. At WOT I am turning 5000 rpms and running 38-40 mph and that… read more
James
James
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Vocational, Technical or Trade Scho
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1978 16ft alum monarch boat with mercury 500 50 hp . what
1978 16ft alum monarch boat with mercury 500 50 hp . what dia and pitch prop would work best? I now have a 9 1/2 dia. 14 ss. pitch and the motor seems to only d=be reving about 3000- 4000 at wot.… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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purchased "new" 2006 johnson 90hp v4 2stroke for 20 foot pontoon
purchased "new" 2006 johnson 90hp v4 2stroke for 20 foot pontoon ('06 Bentley with lifting strakes), and this motor cavitates over 4000 rpm (was equipped with '03 merc 75). which size and type of prop… read more
Tan
Tan
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I am thinking to purchase a 115 hp / 4 stroke engine for my
I am thinking to purchase a 115 hp / 4 stroke engine for my odessy 23 foot pontoon boat.....repacing 40 hp that goes very slow. boat is rated for 130 hp. Is this a good choice? What shaft length is ne… read more
Jason
Jason
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Vocational, Technical or Trade School
22,804 satisfied customers
I have a 16 ft. aluminum Legend fishing boat (side console).
I have a 16 ft. aluminum Legend fishing boat (side console). The hull Weight is 640 lbs. Maximum capacity is 1,220 lbs. The outboard engine is 25 HP EFI 4-Stroke. The engine's full throttle RPM range … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
I have a Fisher 200 Freedom Fish pontoon boat with a Merc 50hp,
I have a Fisher 200 Freedom Fish pontoon boat with a Merc 50hp, 4cyl, 4 stroke outboard. Both are 1996 vintage. I need a new prop. The current prop is 10.5" dia with about a 11" pitch. It has always e… read more
Captain Dave
Captain Dave
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Master's Degree
2,808 satisfied customers
I have a 22 foot Misty Harbor pontoon with a 50 hp Merc Bigfoot.
I have a 22 foot Misty Harbor pontoon with a 50 hp Merc Bigfoot. After being on the water for a while, shifting in and out of gear, I run into a problem. When I push the throttle forward I can idle fo… read more
Whitecap36
Whitecap36
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I just bought a 1990 Mirrocraft 16 foot fishing boat fitted
I just bought a 1990 Mirrocraft 16 foot fishing boat fitted with a 1991 Merc 2 stroke 75 hp motor.What is the correct prop size?As best as I can see the current prop is 40 77348 A40 21 P.… read more
Jeremy R.
Jeremy R.
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I have a 115 hp Yamaha out board (2007 model)... I have to
I have a 115 hp Yamaha out board (2007 model)... I have to get a new propeller and the one I have does not have any numbers that help me idenify the type of propeller and the pitch. Can anyone help me… read more
Jason Forsberg
Jason Forsberg
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Hello, I have a Merc outboard 1982 9.8hp. Runs great. I would
Hello, I have a Merc outboard "1982" 9.8hp. Runs great. I would like to pitch up on the prop but can't find any info even on stock replacement. I believe it is a 9 inch dia. 10 inch pitch 3 bladed pro… read more
Scott
Scott
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Hi. I have a 2006 Mercury ( Tohatsu) 25hp 4 Stroke outboard
Hi. I have a 2006 Mercury ( Tohatsu) 25hp 4 Stroke outboard on a 19 foot pontoon boat. The recommended rpm is 5600-6000, I only achieve 5200-5400 with the 10 1/4" by 8"Pitch quick silver prop I have. … read more
Jason Forsberg
Jason Forsberg
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Vocational, Technical or Trade Scho
531 satisfied customers
I am looking to buy a 2004 bennington pontoon boat,2075, it
I am looking to buy a 2004 bennington pontoon boat,2075, it is a tritoon with a merc. 115 motor. the motor does not have a prop on it. what size prop does it need to be and what kind of speed would i … read more
Dr. Joe
Dr. Joe
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

3,332 satisfied customers

40 years boating, Safe boating instruct., Offshore Race promoter, Failure Analysis, Expert Witness

Dominick

Dominick

Marine Mechanic

1,009 satisfied customers

25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified

John White

John White

Marine Mechanic

306 satisfied customers

11 years experience working on outboards, inboards, sterndrives & pwcs

Jason

Jason

Marine Mechanic

22,804 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,409 satisfied customers

40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.

Jeff G.

Jeff G.

Marine Mechanic

4,730 satisfied customers

42 years experience, Certified Master Technician, All Major Outboards, Sterndrives, Hi-Performance

Noel Schembri

Noel Schembri

Marine Mechanic

2,759 satisfied customers

Advanced technical diploma

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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