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I have a 99 sundancer 270 with twin 4.3. There are two
I have a 99 sundancer 270 with twin 4.3. There are two isolator (I believe that is what they're called) switches wired to batteries. One switch is 1/2/both/off while the other is main on/off. There is… read more
Yachtwork
Yachtwork
Owner Team Yachtwork
Technical or Trade School
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Dual Battery switch wiring as Tan described 6 years ago but
Dual Battery switch wiring as Tan described 6 years ago but with two F150 yamahas … read more
Jason
Jason
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Vocational, Technical or Trade School
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Tan, I'm looking at your 4 yr old dia of 2 battery switches,
Hello Tan, I'm looking at your 4 yr old dia of 2 battery switches, 4 batteries, twin outboards. It shows the starters X'ed out? I have the same electrical with twin inboards. I'm restoring a 1980 blac… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
What was the original battery set up on a Sea ray 2004
What was the original battery set up on a Sea ray 2004 Amberjack with three batteries and two switches 2 cranking and 1 house ? Bought the boat used with 3 cranking bateries 2 of them are bad I have 2… read more
Jason
Jason
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Vocational, Technical or Trade School
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Wellcraft 290 coastal. Has 2 battery's starboard starts Starboard
Wellcraft 290 coastal. Has 2 battery's starboard starts Starboard motor and is also house battery. Port battery is only for starting Port eng. Each battery has a factory on/off switch only. NOT 1/2/bo… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
I have a omc cobra model either 50facpmd or 50fagpmd. dont
I have a omc cobra model either 50facpmd or 50fagpmd. don't know the difference. I am fuel issues with the starboard engine. both have new fuel/water filters and every thing was mechanically great whe… read more
Tan
Tan
MerCruiser Certified Technician
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11,507 satisfied customers
Tan, Looking for a good wiring diagram and suggestions on
Tan, Looking for a good wiring diagram and suggestions on how to hook up charging circuits etc, 2800 Pursuit Express, twin Yamaha 200's, 3 bank battery charger, re-working the wiring, too much stuff h… read more
Tan
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I have a 79 gm 350 Crusader starboard engine, Carver 33.
I have a 79 gm 350 Crusader starboard engine, Carver 33. Runs fine until.... Problem appears to be in the ignition system. Have replaced electronic distributor, coil and alternator. With each replacem… read more
Jason
Jason
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Vocational, Technical or Trade School
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1996 powerquest 380 avenger twin 502cu./415hp starboard engine
1996 powerquest 380 avenger twin 502cu./415hp starboard engine shuts off under takeoff,sounds and acts like the fuel is turned off, still cranks over and tries to fire but again acts like it is out of… read more
Noel Schembri
Noel Schembri
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I have two MERCRUISER 350 CID V-8 MPI MAG engines in my boat.
I have two MERCRUISER 350 CID V-8 MPI MAG engines in my boat. I love them!! They have stock (65 amp??) altenators charging the respective start battery for each engine.. Exising wiring does not allow … read more
James
James
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Vocational, Technical or Trade Scho
4,094 satisfied customers
Another question for cummins dr Boat 34 twin Cummins
Another question for "cummins dr": Boat: 34' twin Cummins diesel 250 hp. I am unable to get the port engine to charge the "house" bank of batteries. This has been going on for some time. Over the past… read more
Yachtwork
Yachtwork
Owner Team Yachtwork
Technical or Trade School
2,452 satisfied customers
I have a 2002 Searay Amberjack 290, and I need to know the
I have a 2002 Searay Amberjack 290, and I need to know the right way to replace the starter battery for the starboard engine. It has twin Mercruiser 5.7 liter V8s with Bravo III drives. There are 3 ba… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
Cruisers 3375 with twin 454s, wiring is confusing. What gauge
Cruiser's 3375 with twin 454's, wiring is confusing. What gauge wires should go from alternators to isolator. Isolator to batteries(3). Switch to starter? Does the shore power from the inverter/conver… read more
K. Kergan
K. Kergan
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Vocational, Technical or Trade Scho
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I HAVE TWIN 250 YAMAHAS 4 BATTERY SYSTEM WITH 2 PERKO SWITCHES
I HAVE TWIN 250 YAMAHAS 4 BATTERY SYSTEM WITH 2 PERKO SWITCHES WHAT IS THE CORECT WAY TO HOOKUP… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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I HAVE A 1998 37 SEARAY WITH TWIN 7.4L MULTIPORT FUEL INJECTED
I HAVE A 1998 37' SEARAY WITH TWIN 7.4L MULTIPORT FUEL INJECTED ENGINES.I'VE HAD THE BOAT A LITTLE OVER A YEAR AND THE ENGINES HAVE BEEN RUNNING GREAT. THE VOLT METERS HAVE ALWAYS READ A LITTLE HIGH W… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
my dilema..do i need an isolater/combiner for this system
my dilema..do i need an isolater/combiner for this system? I have a Perko Switch.....off, 1, 2. I will have 2 Optima Blue Tops as a battery bank, and one Optima Marine as a starter. Will this be suffi… read more
Jeff G.
Jeff G.
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I am trying to re-wire a 48ft houseboat with twin Johnson 60s.
I am trying to re-wire a 48ft houseboat with twin Johnson 60s. I believe they are 1994. Is it possible to separate the charging lead for running a battery isolator system for each motor? I currently h… read more
Captain Dave
Captain Dave
Charter Captain & I.S. Director
Master's Degree
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Port side engine will start and run, but then wont shut off
Port side engine will start and run, but then won't shut off with the switch. I have to go turn the perko to off and then the ignition switch to start to get it to turn off. I replaced the switch but … read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
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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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