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I have a 2001 380 Sundancer is powered by twin Mercruiser
Hi. I have a 2001 380 Sundancer is powered by twin Mercruiser 370-hp 8.1 S Horizon v-drive engines. Original engines. A little over 500 hours. Always maintained by marina service dept. Replaced spark … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
23,004 satisfied customers
I have a 2003 sea ray 340 sundancer with twin Mercury 8.1
Hi, I have a 2003 sea ray 340 sundancer with twin Mercury 8.1 horizons. All of a sudden the starboard engine when In gear only reaches a max rpm of 3600, while the port maxes at 4200. In neutral howev… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
I have a SeaRay Sundancer 290 with twin Mercruiser Sterndrives.
I have a SeaRay Sundancer 290 with twin Mercruiser Sterndrives. Under the dash there are two one-inch circular alarms which are Mercruiser engine alarms as indicated on a tag attached to the alarm wir… read more
Jason
Jason
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Vocational, Technical or Trade School
23,004 satisfied customers
Which used boat to buy? 1997 Sea Ray 40 Sundancer diesel
Which used boat to buy? 1997 Sea Ray 40' Sundancer diesel w/1000hrs -or- 2001 Regal Commodore gas w/620hrs.… read more
Jason
Jason
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Vocational, Technical or Trade School
23,004 satisfied customers
I have twin Mercruiser 8.1 Horizons on a 2004 Searay 360 DA.
I have twin Mercruiser 8.1 Horizons on a 2004 Searay 360 DA. I am having problems with a low oil pressure on my strb engine. At idle with a new oil filter and oil, the pressure at panel is around 50 p… read more
Ted G.
Ted G.
Rigger, Diagnostician
Vocational, Technical or Trade Scho
2,678 satisfied customers
Good evening, I have a 2002 Silverton 352 with twin Mercruiser
Good evening, I have a 2002 Silverton 352 with twin Mercruiser 8.1 Horizons. 370 hours. Boat runs excellent. Port engine lately will not achieve rpm over 3700. Starboard will WOT at 4150. The throttle… read more
Ted G.
Ted G.
Rigger, Diagnostician
Vocational, Technical or Trade Scho
2,678 satisfied customers
i have a 2003 searay sundancer 300 with the twin 5.0 EFI engines.
i have a 2003 searay sundancer 300 with the twin 5.0 EFI engines. Yesterday on our way back from a 2hr boat ride we heard a engine alarm and the starboard engine shut down soon after. The engine will … read more
Rick Gay
Rick Gay
High School or GED
106 satisfied customers
My new sundancer 370 equiped with twin inboard 8.2 mei horizon
My new sundancer 370 equiped with twin inboard 8.2 mei horizon mercruiser 375 hp engines produces white smoke from both engines, something i was not expecting and have never seen before in any boat. M… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I. have a 2001 searay 38 sundancer with approx 800 hours on
I. have a 2001 searay 38' sundancer with approx 800 hours on 8.1s horizon 370 hp engines the recent problem i have run into are 1-ther is approx 1 quart of anti freeze in bilge area, it appears to be … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 2001 389 Aft Cabin with twin Mercruiser Horizon MPIs
I have a 2001 389 Aft Cabin with twin Mercruiser Horizon MPIs (454s) When the boat has been running for several hours, a rapid throttle down on my starboard engine frequently results in engine shut do… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 1998 Searay 290DA Sundancer with twin - 5.0 EFI Mercruisers
I have a 1998 Searay 290DA Sundancer with twin - 5.0 EFI Mercruisers and Alpha one drives The boat has 310 hours on it and had been used very little before I purchased it in 2008 For the past several … read more
Ted G.
Ted G.
Rigger, Diagnostician
Vocational, Technical or Trade Scho
2,678 satisfied customers
I just bought a 1998 SeaRay Sundancer 31 foot, which has twin
I just bought a 1998 SeaRay Sundancer 31' foot, which has twin 5.7 MerCruiser inboards. Our initial voyage was spectacular (5 hour transport run). However, when we were approaching the dock in idle sp… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,557 satisfied customers
I have a 2006 SUndancer 340, with twin Merc 8.1 Horizons, approx
I have a 2006 SUndancer 340, with twin Merc 8.1 Horizons, approx 100 hours on the engines. Problem which began this year - the port side engine is consuming approximately 1.5 - 1.6 times the fuel of t… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 2000 Searay380 AC with 7.4 Mercruiser Horizons with
I have a 2000 Searay380 AC with 7.4 Mercruiser Horizons with 250 hours. I am getting ready to replace the starboard engine for the 2nd time - 3 engines in 250 hours. My mechanic tells me that it's a S… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
hi. I am looking at a boat at my marina which is for sale that
hi. I am looking at a boat at my marina which is for sale that has a new set of Mercruiser re-man 7.4L 380 Horizon engines. I have heard from various sources that Merc. had problems with their sub-con… read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 satisfied customers
I have a 2001 38 Searay Cruiser with twin T8.1L horizons. The
I have a 2001 38 Searay Cruiser with twin T8.1L horizons. The starboard engine started to make a rapping sound pulling into the dock. Then I could not start it. The starter would engagement and stop i… read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 satisfied customers
Hi I have a 2004 Searay Sundancer with twin 8.1 Horizon motors.
Hi I have a 2004 Searay Sundancer with twin 8.1 Horizon motors. The boat has 142 hours on it and I want to know how you can tell if the engines need exhaust manifolds. I have been told that they last … read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 satisfied customers
I am in the process of purchasing a 2003 SeaRay Sundancer 340
I am in the process of purchasing a 2003 SeaRay Sundancer 340 with Mercruiser 8.1 L FWC engines with 150 hours each. Are their any common maintenance issues or problems that I should look for either i… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 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

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

23,004 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

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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