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I have a 18ft 1985 ranger 370-v w/ a 150 mercury blackmax
I have a 18ft 1985 ranger 370-v w/ a 150 mercury blackmax that had a 23p prop that takes off very slow out of the water. A mechanic said I should try a 21" pitch or 19" pitch. I tried a 21" pitch over… read more
Noel Schembri
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Since our last exchange Spond I knew question I thought I
Good morning Jason, since our last exchange Spond I knew question I thought I would start a new question here. Now that I have apparently solved my power issue , my boat is able to get up on plane wit… read more
Jason
Jason
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I have a 2014 Rinker 246 BR. The motor is 260 hp. The boat
I have a 2014 Rinker 246 BR. The motor is 260 hp. The boat is on the heavy side and it takes awhile to plane out. The dealer mentioned going from a 3 blade to a 4 blade prop, which I did. The prop did… read more
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WHAT IS THE MAX RPM OF A 2002 MERCURY XR-6. MINE IS 5800RPM.
WHAT IS THE MAX RPM OF A 2002 MERCURY XR-6. MINE IS 5800RPM. I WONDER IF I NEED A PROP WITH MORE PITCH. THE MOTOR IS ON A 2002 HURRICAINE BOAT 19' FUN DECE. IT WILL DO ABOUT 35 MPH TOP SPEED AT 5800. … read more
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I have a 05 115 4 stroke yamaha on a 17 MAKO (89) and it would
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Jeremy R.
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I have a 2000 Johnson 200 that is giving me trouble. It "acts"
I have a 2000 Johnson 200 that is giving me trouble. It "acts" like it drops a cylinder or something. I've had the carbs cleaned, new plugs and even tried a new power pak. It is very sporadic at when … read more
Jeff G.
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I have a 2003 Johnson 90 hp 4 Stroke Bombardier electronic
I have a 2003 Johnson 90 hp 4 Stroke Bombardier electronic fuel injection engine. I purchased toe pontoon and motor in march. We have used the pontoon and have had the boat loaded with six (6) adults.… read more
Jeremy R.
Jeremy R.
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I have a 2005 115 hp 4 stoke EFI engine. It doesnt seem to
I have a 2005 115 hp 4 stoke EFI engine. It doesn't seem to deliver the performance I think it should. It came to me with a 17" prop and would only tach about 4800 rpms. I changed to a 15 and it gets … read more
Jason
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I have two Volvo Penta KAMD 44 marine engines in my 2001 Princess
I have two Volvo Penta KAMD 44 marine engines in my 2001 Princess 38. Thse engines seem to be little too small for the boat. The fuel consumption is quite high. What is the optimal rpm for normal trav… read more
Jason
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I have a 1997 60 hp mercury bigfoot 2 stroke engine. I will
I have a 1997 60 hp mercury bigfoot 2 stroke engine. I will bog down occasionally at 3200 rpms and stall out. I will run under 3200 rpms fine and idle great.… read more
Jason
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Mercury I have a 2001 Mercury 200 hp EFI. Starts and runs
I have a 2001 Mercury 200 hp EFI. Starts and runs fine, When running above 5300 rpm the motor loses power but does not die. I can tilt back down and plane and run again. i changed the prop to a four b… read more
Jeremy R.
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I recently ran my boat and on ocassion I top it out for a minute
I recently ran my boat and on ocassion I top it out for a minute it usually will get around 4700 rpms now it will max at 4200rpm with motor trimmed up. I changed the plugs and water seperator.… read more
Whitecap36
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I have 1985 wellcraft 3400 grand sport it well only run 19
I have 1985 wellcraft 3400 grand sport it well only run 19 mph full throttle at 3500 rpm Should run faster.… read more
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I have an 06 e-tec 200 hp on a Triton 196 and it has a new
I have an 06 e-tec 200 hp on a Triton 196 and it has a new power head with everything on the power head new. It still struggles to come out of the water and plain off. What is the problem?… read more
Master Tech
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I have a 1975 850 mercury outboard. I need to know max rpms
I have a 1975 850 mercury outboard. I need to know max rpms to get a new prop. I do a lot of bass fishing and just a little bit of water skiing. I am looking for a good medium to fit the bill. The boa… read more
Tan
Tan
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I have a 16 ft aluminium boat with a 50 HP yamaha outboard
I have a 16 ft aluminium boat with a 50 HP yamaha outboard , when we have more than 2 people in the boat and we are just starting off, the motor won't get more than 3000 RPM's and the boat won't get o… read more
Scott Martin
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iv got a mercury 1979 150 hp, what sould my wide open running
iv got a mercury 1979 150 hp, what sould my wide open running rpm be ,also rec rpm be i was once able to reach 45mph now only 35 could it be prop problems slipping? orwires replaced the plugs thanx in… read more
Pappy's Sales and Service
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What is the max rpm for a 1988 mercury 100 hp outboard And
What is the max rpm for a 1988 mercury 100 hp outboard? And if im getting 4500 rpms at full throttle with a top speed of 38 to 40 now with a 22 pitch prop which pitch should I get to give my boat a be… read more
Steve Sr.
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No Title
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

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

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Jason

Jason

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Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

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Jeff G.

Jeff G.

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Noel Schembri

Noel Schembri

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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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