Electric starter and rectifier

merkdawg0084

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Hey guys, I have a 1993 Evinrude 15hp. It is a rope start, but I have found an electric start kit for this motor with a rectifier at a great price. My question is this. I want to be able to install a quick connector between the motor and batter wire harness. Like an SAE connector. What is the smallest gauge wire I can get away with? Thanks
 

gm280

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Hey guys, I have a 1993 Evinrude 15hp. It is a rope start, but I have found an electric start kit for this motor with a rectifier at a great price. My question is this. I want to be able to install a quick connector between the motor and batter wire harness. Like an SAE connector. What is the smallest gauge wire I can get away with? Thanks
You may have a few problems. First, if your engine is a pull start, then there probably isn't a stator installed. And that means you can't charge anything being how there is no stator and/or a rectifier circuit. If you have a stator, then you should be able to find the appropriate rectifier and starter for it as well. However, if you do have that setup, I am not so sure disconnecting the charging circuit will work, especially if it is running. Usually an open charging circuit isn't a great idea for the rectifiers. So rethink this before moving forward. If you have plans to disconnect the charging circuit while it is not running, you could get away with that. But you still need a stator and rectifier setup. JMHO
 

Vic.S

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Hey guys, I have a 1993 Evinrude 15hp. It is a rope start, but I have found an electric start kit for this motor with a rectifier at a great price. My question is this. I want to be able to install a quick connector between the motor and batter wire harness. Like an SAE connector. What is the smallest gauge wire I can get away with? Thanks
Are you sure about this.
I don't see an electric start conversion kit listed for this engine

Not only will you need the starter motor and solenoid, a different flywheel, different stator and a rectifier but practically everything under the flywheel of the electric start version is different

Check this "kit" out carefully before parting with any beer tokens
 

merkdawg0084

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Yes racerone that is the kit that I bought from sunset marine in California. Retailed for $861.00 he let me have it for $425.00 and kicked in the solenoid. Hell of a deal. Thanks
 

merkdawg0084

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Are you sure about this.
I don't see an electric start conversion kit listed for this engine

Not only will you need the starter motor and solenoid, a different flywheel, different stator and a rectifier but practically everything under the flywheel of the electric start version is different

Check this "kit" out carefully before parting with any beer tokens
Thx Vic S, but yes there is an electric start conversion kit. The kit comes with everything you stated, except the solenoid. Even comes with the start button that goes in the tiller handle,
 

merkdawg0084

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You may have a few problems. First, if your engine is a pull start, then there probably isn't a stator installed. And that means you can't charge anything being how there is no stator and/or a rectifier circuit. If you have a stator, then you should be able to find the appropriate rectifier and starter for it as well. However, if you do have that setup, I am not so sure disconnecting the charging circuit will work, especially if it is running. Usually an open charging circuit isn't a great idea for the rectifiers. So rethink this before moving forward. If you have plans to disconnect the charging circuit while it is not running, you could get away with that. But you still need a stator and rectifier setup. JMHO
Yes, my motor is rope start, The electric start kit that I found from a dealer comes with, new flywheel, stator, rectifier, starter, start button and all the cables and hardware. If you go to Leeroy’s ramblings there is a link that talks about converting over to electric start, I’m only going to unplug the connector when the boat is parked and I want to completely charge the battery. And I am able to keep the rope start too,
 

merkdawg0084

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Here is an electric start kit,
 

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gm280

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Now would anyone like to answer my original question? Thank you
Okay, the wire size totally depends on the current output of the start kit and stator. If the kit states how much current the stator output can be, then you buy the appropriate gauge wire to handle that current. For example, it the out put is 10 amp, and I don't see that much output happening, then 12 gauge would handle that all day long. Of course it all depends on the capability of the starter kit AND the distance to the battery. The longer the run to the battery (like in the front of the bow), the lower the gauge size wire you will need. But 12 gauge would be safe for most situations... JMHO
 

Crosbyman

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Just curious,

the kit seems to come with the wires needed for the job. why would you want to go "smallest wire possible" ? . I am certain the manuf. did not incl. a wire size "bigger" than what the installation needs at an added cost for no reason.

the kit seems more expensive than a 27 year old engine :eek: unless you got a bargain
 

merkdawg0084

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Yes Crosbyman I got the whole kit plus solenoid for $425.00. The reason for the question. My battery is not in an open area. It has a lid that I have to open to get to the battery. Can’t drill holes or anything. I wanted to be able to disconnect the battery from the motor when traveling and storing in garage. Would like a quick disconnect like an SAE design. This is my motor. I think it’s worth the $425.00 to convert to electric start?
 

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merkdawg0084

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Okay, the wire size totally depends on the current output of the start kit and stator. If the kit states how much current the stator output can be, then you buy the appropriate gauge wire to handle that current. For example, it the out put is 10 amp, and I don't see that much output happening, then 12 gauge would handle that all day long. Of course it all depends on the capability of the starter kit AND the distance to the battery. The longer the run to the battery (like in the front of the bow), the lower the gauge size wire you will need. But 12 gauge would be safe for most situations... JMHO
Thx
 

Crosbyman

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I am not to worried about the charge amps. the amp load & voltage to run the starter is the critical one for 3 reasons .
a- voltage drop on a long run due the a " to small" cable per/foot resistance
b- amp requirement for the starter
c- amp rating of the cable itself
suggestion: try to get yourself a amp meter (clamp on style) and measure the current draw while starting ( should much higher than the charge current) or try to find technical specs of the starter .

the general rule is to use the biggest wire to meet the needs of a-b-c- above
 
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