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28' Mariner bad Resister on the ignition

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jwrape
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Vessel Info: 79' Carver 28 Mariner Twin Pleasurecraft 302's (For Sale $12,300)
85' Carver 3207 Aft with Mercury 5.7L
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28' Mariner bad Resister on the ignition

Postby jwrape » April 5th, 2014, 7:07 am

I figured out why my engines would only start on the release of the key and not when the key was being turned. The resiter shown here on the rear of the motor is weak. This resister is in line with the power to the coil. So since it's weak it depleats the initial voltage on the coil and reduces the spark on the plugs while the start is spinning. If the resister works correctly it applies 12v to the coil during the entire starting cycle. Once I crossed it over the motor started right up and ran perfect. If I un-cross it, the motor will run with throttle but not idle. I need to find two new ones to make it right.

I search Ebay but didn't find them, Does anyone know where to get them? They say 2 ohm's. It is located on the back of the engine beside the breaker right where the top of the transmission connects to engine.

Please tell me you know what this is cause I need two of them. If not I will buy a regular 2 ohm resister and put it in line and see if that works.
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jwrape
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Posts: 73
Joined: March 27th, 2014, 1:24 pm
Vessel Info: 79' Carver 28 Mariner Twin Pleasurecraft 302's (For Sale $12,300)
85' Carver 3207 Aft with Mercury 5.7L
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Re: 28' Mariner bad Resister on the ignition

Postby jwrape » April 5th, 2014, 7:40 am

Ah..... I did a little googling, God Bless Google, and found that since I converted to electronic ignition I do not require a Ballast resister on my coil anymore so I will just take it out of the circuit and all is well.
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waybomb
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Vessel Info: 1987 3697 Carver Mariner
1988 Cougar 46 Kevlar Vee offshore
1969 15' Glaspar / 1969 Johnson Electrmatic 85
1964 Barron Flat bottom drag boat
A couple of dinghies
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Re: 28' Mariner bad Resister on the ignition

Postby waybomb » April 5th, 2014, 7:58 am

I believe you are misled.

If your coil does not have a built in resister you need the resister or you will overheat the coil.

Also the resister does not know you are cranking or running; it does not switch on and of by itself. Only you ignition switch controls that.

But it isa good I'd to replace both resistors regularly.

Use the correct resistor. They can be found on ebay.
Thanks
Fred
1964 Barron Flatbottom with BBC Chevy
1969 Glaspar Avalon /1969 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572s
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Past - 1988 2807, 1989 4207 Aft
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Topic author
jwrape
Deck Hand
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Posts: 73
Joined: March 27th, 2014, 1:24 pm
Vessel Info: 79' Carver 28 Mariner Twin Pleasurecraft 302's (For Sale $12,300)
85' Carver 3207 Aft with Mercury 5.7L
Been thanked: 1 time

Re: 28' Mariner bad Resister on the ignition

Postby jwrape » April 5th, 2014, 8:00 am

waybomb wrote:I believe you are misled.

If your coil does not have a built in resister you need the resister or you will overheat the coil.

Also the resister does not know you are cranking or running; it does not switch on and of by itself. Only you ignition switch controls that.

But it isa good I'd to replace both resistors regularly.

Use the correct resistor. They can be found on ebay.


I read it here
http://www.mastercraft.com/teamtalk/showthread.php?t=49199
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Topic author
jwrape
Deck Hand
Deck Hand
Posts: 73
Joined: March 27th, 2014, 1:24 pm
Vessel Info: 79' Carver 28 Mariner Twin Pleasurecraft 302's (For Sale $12,300)
85' Carver 3207 Aft with Mercury 5.7L
Been thanked: 1 time

Re: 28' Mariner bad Resister on the ignition

Postby jwrape » April 22nd, 2014, 9:21 am

Yesterday I went and replaced the Terminal resistor with a 30amp fuse and now both engines start like new.
They run great.
They used to take so much to get started and I usually end up flooding them out. Now they start immediately.
Here they are
http://www.youtube.com/watch?v=qvLaMIn4rHg&feature=share&list=UU9CT249I05DyxqKD1RpYfpQ

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