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Ive got a 2004 velocity sc with a 496 mag ho in it and a 26
hi. ive got a 2004 velocity sc with a 496 mag ho in it and a 26 pitch 4 blade bravo prop. running at 5000 rpm and only getting 57 max speed when i should be running about 73. any ides as? … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
My boat has a single Mercruiser 496 engine. Are flappers a
My boat has a single Mercruiser 496 engine. Are flappers a requirement? Please advise. Thanks. … read more
Ted G.
Ted G.
Rigger, Diagnostician
Vocational, Technical or Trade Scho
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RPM loss cannot go WOT. Mercruisers 8.1S HO, I need to know
boat was running great. I just had a transmission replaced on starboard but it seems to be running great. I also see white steam coming out on the back but I think I always had that, strainers are clean… read more
Jason
Jason
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Vocational, Technical or Trade School
22,043 satisfied customers
I have a mercruiser 496 mag ho, and it won't rev over 3000
I have a mercruiser 496 mag ho, and it won't rev over 3000 rpms. No beeps or alarms changed plugs fuel pressure is good. Plugged in scanner no codes that would affect this situation. So i unplugged th… read more
Charles
Charles
Certified Mercury Tech
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I have a Bayliner 2855 96 model and it has a 7.4 mercruiser
I have a Bayliner 2855 96 model and it has a 7.4 mercruiser with bravo 3 drive and 26 p props on it . i was out with a group of 6 adults on board and it could not get up on to the plane. the engine wa… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
2,682 satisfied customers
Hi, I have a Mercruiser 5.0 MPI and it gives an overspeed
Hi, I have a Mercruiser 5.0 MPI and it gives an overspeed alarm at 4000rpm. The engine has been checked and it doesn't actually overspeed. The ecm has been swapped with the other engine on the boat, b… read more
Malta Tech
Malta Tech
Marine Tech
High School or GED
287 satisfied customers
have 2009 mercruiser 496, hit a underwater sand bar, stopped
have 2009 mercruiser 496, hit a underwater sand bar, stopped boat, no damage to stern drive, computer went into limp home mode, how do i get it reset. put boat on lift and everything on the sterndrive… read more
orcamarine
orcamarine
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Vocational, Technical or Trade Scho
7 satisfied customers
do you know where the sending unit for gas gauge would be on
do you know where the sending unit for gas gauge would be on a Powerquest 2005 (32 ft) with twin merccruisers. Boat did not come with any manuals..........I am also searching online for a manual.It is… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I just bought a used 2008 350 ss formula with mercruiser 496
I just bought a used 2008 350 ss formula with mercruiser 496 HO's. My starboard engine keeps dying. I've been told to have the FSM cleaned because it causes a vapor lock. I had this done and then I re… read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 satisfied customers
I live in Salt Lake Utah area 4250 and am running a 26 commander
I live in Salt Lake Utah area 4250' and am running a 26' commander 496 mag ho had motor scanned no problems. changed prop from 24 - 22. With 24 seen 41-42k rpm with 22 seen 45-47k. Top speed with 22 -… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
2,682 satisfied customers
I bought a 2006 Formula 240 BR with a 496 mercruiser, 375hp.
I bought a 2006 Formula 240 BR with a 496 mercruiser, 375hp. Bravo III 26 pitch props with a high altitude gear ratio, 2.2/1. I live at 550 feet above sea level and am worried about the high altitude … read more
Tan
Tan
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Certified Marine Technician
11,409 satisfied customers
What is better for power a 3.0l mercruiser inboard (2006) or
What is better for power a 3.0l mercruiser inboard (2006) or an evinrude 115hp outboard (2007) and why??… read more
KKassel
KKassel
OWNER
High School or GED
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Have a 496 ho 2003 equipped with emi headers..running rich
Have a 496 ho 2003 equipped with emi headers..running rich is there anything I should add to fuel?… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
we have a mercruiser 496ho in a 25 bertram. Seawater intake
we have a mercruiser 496ho in a 25 bertram. Seawater intake is through hull. What should the bar reading be on my smartcraft guages. I believe the water pressure refers to the salt water side. I had a… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
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I need a electrcial schematic of my mercruiser 496 mag ho engine.
I need a electrcial schematic of my mercruiser 496 mag ho engine. My alternator is functioning but not charging the battery.… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a mercruiser 5.0 engine with a bravo ll outdrive. Which
I have a mercruiser 5.0 engine with a bravo ll outdrive. Which prop will give me more MPH, is it 17 3/4 X 21 or 17 3/4 X 23. Waiting for your answer.… read more
Kenny
Kenny
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Master's Degree
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I have a mercruiser 496 HO with DTS and smart tow (28 Magic
I have a mercruiser 496 HO with DTS and smart tow (28' Magic Sceptor). I put CMI headers on it for performance, but It came with a Bravo 3x drive which I found out after I bopught the boat that this p… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
Why would you drop 6 to 8 miles per hour after replaceing the
Why would you drop 6 to 8 miles per hour after replaceing the seales in the out drive? Have a 26' Formula Bow Rider with 405 Engin.… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

2,678 satisfied customers

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

Dominick

Dominick

Marine Mechanic

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

John White

John White

Marine Mechanic

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

Jason

Jason

Marine Mechanic

22,043 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

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

Jeff G.

Jeff G.

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4,730 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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