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Marine mechanics I have a 2014 Etek 135 HO on an 18' hewes
Marine mechanics I have a 2014 Etek 135 HO on an 18' hewes redfisher -if mfr recommends 5300-6000 rpms at wide open throttle will I hurt engine if I only turn 4900-5000 rpms With a viper 14 3/4 x 19 p… read more
Charles
Charles
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I have a 2000 Hewes Bonefisher 18 powered by a 1999 Yamaha
I have a 2000 Hewes Bonefisher 18 powered by a 1999 Yamaha 130. WOT is 4700 rpm and hole shot is poor. Thinking it is the prop which is a 3 blade SS 13.25x19. The prop is probably ten years old, decen… read more
Ted G.
Ted G.
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I have 2012 Xpress alunimum Bass boat it has a F-40 hp
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Charles
Charles
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I just installed a pair of 2013 DF 140 s on a 24 boat,that
I just installed a pair of 2013 DF 140 s on a 24' boat,that is about 8000lbs.At full throttle I am only getting 5200 rpm, and the manual says I should get 6200rpm.I put on a 22 prop, will I risk damag… read more
Noel Schembri
Noel Schembri
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I have a 1996 175 ultima smoker craft with a 1996 115 mercury.
I have a 1996 175 ultima smoker craft with a 1996 115 mercury. It has a 13 x 19 prop. When i go wot my tach will hit 6000 rpm. I don,t want hurt motor so I can only run 3/4 throttle to maintain around… read more
Jason
Jason
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Vocational, Technical or Trade Scho
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I have a merc. 150hp optimax 2011 which has about 10 hours
I have a merc. 150hp optimax 2011 which has about 10 hours on it. It came euiped with a 21 in. pitch four blade prop but after break-in it would only turn 5250 rpm. The prop shop i use has given me fo… read more
orcamarine
orcamarine
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I have a 31 ft boat in Brazil. Comfortable but weighs 5200
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K. Kergan
K. Kergan
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Vocational, Technical or Trade Scho
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I have a 2006 Mercury 60 hp four stroke outboard. On my last
I have a 2006 Mercury 60 hp four stroke outboard. On my last fishing trip I throttled to WOT and the boat felt really sluggish. It would top out at about 4800-5100 rpm. About a mile down river the rpm… read more
Tan
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Hello I have just bought 1995 sea rayder with a 120 mercruiser
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Jason
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Hi I have a Buccaneer 605 escape 1998 model, with a evinrude
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Captndon
Captndon
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I have a mercury 60 hp bigfoot motor on a tracker fishin barge
I have a mercury 60 hp bigfoot motor on a tracker fishin barge 22 FT. I've had it a year. I went on the lake and it got up to 4000 rpm but normally it runs at 5200 rpm. Is 5200 reasonable or should I … read more
Jeremy R.
Jeremy R.
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I bought a Tracker fishin barge with a 60 hp Mercury bigfoot
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Jason
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Vocational, Technical or Trade Scho
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My boat has twin 420 hp Volvo 8.1 GXI engines. The boat has
My boat has twin 420 hp Volvo 8.1 GXI engines. The boat has 100 hours, and the starboard engine will only reach 4400 rpms. The port reaches 5600. Both engines have the props at 21X 21. The starboard e… read more
Jeremy R.
Jeremy R.
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I have a 310 sundancer with 2 7.4 liter I/Os. My port side
I have a 310 sundancer with 2 7.4 liter I/O's. My port side outdrive lower unit was rebuilt last fall and a new outer casing/ housing was installed. The outer casing is a new style which differs sligh… read more
capt ron 1959
capt ron 1959
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Vocational, Technical or Trade Scho
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hi larry . my question is i have my 50 hp mercury 2009 done
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Steve Sr.
Steve Sr.
No Title
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502 BBc 9to 1 compression, Merc 500 hp cam, Demon marine 750
502 BBc 9to 1 compression, Merc 500 hp cam, Demon marine 750 carb, MSD ignition running 32 Degrees total advance. Runs great to about 4200 rpm and destroys pistons at about 4300. two motors in a row, … read more
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I have a 2001 Rinker 340 FV with twin FWC 6.2 Mercs / Bravo
I have a 2001 Rinker 340 FV with twin FWC 6.2 Mercs / Bravo III drives. I had the duo props removed for service over the winter. Now the boat will barely plane. It bogs down at 3000 rpms and slowly ch… read more
ROCKET
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I have twin 2002 200 Mercury EFIs. Recently they ...
I have twin 2002 200 Mercury EFI's. Recently they began to loss RPM's. At first the port would fall from 5700 to 5200 and the starboard would fall to 5000. If I came off plane and restarted they both … read more
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Meet the Experts:

Dominick

Dominick

Marine Mechanic

1,009 satisfied customers

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

Ted G.

Ted G.

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704 satisfied customers

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

John White

John White

Marine Mechanic

306 satisfied customers

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

Jason

Jason

Marine Mechanic

17,310 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,264 satisfied customers

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

Jeff G.

Jeff G.

Marine Mechanic

4,729 satisfied customers

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

Captain Dave

Captain Dave

Marine Mechanic

2,672 satisfied customers

USCG Licensed Captain, 20+ Years Boating, Fishing, Maintenance and Repair Experience

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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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