what resistor?-6 volt choke solenoid to 12 volt

[outboardnut]

I would like to mount the resistor inside the hood (lower pan) of a 1955 25 hp Johnson RDE-17
I will be running a 12 volt starter.
What resistor do you guys suggest to use. Please keep in mind size.

[crosbyman]

resistors are usually for dropping 12 volts batteries down for 6 volt starters.

if your starter is 12v. I do not think you need to add a resistor do you …maybe for a 6v selenoid or choke ??

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[outboardnut]

I apologize for not making myself clear.
I have a 12 battery
I have a 12 starter
But I have a 6 volt choke solenoid
Can I use some kind of resistor on the 6 volt choke solenoid so the choke solenoid will run on 12 volts?
If I can-what brand resistor should I purchase?? The smaller the better

[crosbyman]

Somebody may chime in with the ohms/watts combination but if you simply measure the current flowing in your selenoid when energized at 6 volts you can calculate the internal resistance
with V/I=R

adding another equivalent R value resistor in series with the selenoid should do it when pushing it with 12volts .

Since the selenoid is used for very short period you are likely safe with a 5 -10 watt rated resistor or try to find a similar resistance ballast in automotive parts .

you could even test it with a common 12 v light bulb acting as a ballast resistor.

jmho

btw do a search on ballast resistor… I see you had posts on this very subject subject back to 2018 !! with lots of feedback

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• This reply was modified 2 years, 6 months ago by crosbyman.

[labrador-guy]

outboard nut here is a resistor that might that might work for you.

https://www.ebay.com/itm/401741722878?_trkparms=ispr%3D1&hash=item5d89ac34fe:g:30gAAOSw6zRgDvB3&amdata=enc%3AAQAGAAACoPYe5NmHp%252B2JMhMi7yxGiTJkPrKr5t53CooMSQt2orsS%252BMKizvpuEDUfX4dvRWfUzQFLChQ6YLHBnuyhhFgY2T4Gjvs97ZPRGSnteFMPpHbYHhMvGfADDiloWgQzXLFGNy%252FcC446TDcBsOWvHb2MI4qw%252FEiaLBxT9IrGv3Zt9WfIPJ%252FnrPQKa5hHHoilKDEOS30EJpxNxEhPfW2kAm%252FthqAlXTQWVo3p7OOFoUJlsLgo8iOtwJxLI0cQpEDE3rXD8oOEfhOMsoV1aaFOXkMAFmicp5ZzinbF6g%252BRFqNCgwmeWzFdI6MGliSCGp7DG0lYlyfe2n2Y0c9zEofXU1KEqQVapUx45P%252BhYlvnjP4YcDnYTtxC9BtSjc1lCvyA%252B49FDfuQNL36f7NpyH7TvFskDprye67GTlU8q%252FtX9%252FJ5oanrl8xDRSrUiu6zrgE0AOnNFAK3UUDvyyU9uGdSTNkf%252F8wjMBQD3G0FyaNB7tFNPUMEQLc27Z5uvq7CPusdHXS2jmRyKtcbFxYS59%252BJzDFtHQ0QAjABS5HdVPQmm54eP1%252BLM8hT87tjH%252FuM7g7MorT8lIAuqjyMomWQ0BNFN1y6lGLtkzBssbOz%252BEEdnlkkFXXwyVoU3fsHKFJQ23eSYQw92Hd2VgCrTI2AJRR94r9YIKdC4cKIHLS2aZbSI%252F%252Bpz%252B35mP3MG25XWMNDaoPMOc4lFj9HGmgHre6AhnlyabRAbHKNWLT%252B9h68nNrPSiKalma1NsMim4blyE5pqtm1mF1hXsSdx8npu9KkzAG59dwjew045s9dGLkjqs1Hk9EqGLb%252BHhHFv8ex4dpNTZkMUanmtW3W2lidEiJAJQ6GbZeIbbBzTtvC3RgW2xnmoheWc6MBRyJTK7GSRhMLbVVpeo1IkA%253D%253D%7Campid%3APL_CLK%7Cclp%3A2334524

dale

[Tom]

Can you just use another solenoid?

[outboardnut]

Just using another choke is too simple LOL
In reality -I have few 6 volt choke solenoids that I would like to use up
12 volt is Unavailable from Marine engine
http://www.marineengine.com/newparts/part_search.php?part_num=376806
If I went Ebay route to get 12 volt . It would be cheaper to use a resistor with what I have.

[jcrigan]

Wire 2 solenoids in series?

[Tom]

Yes, in series… end to end, not parallel.

T

[outboardnut]

After reading some old posts as suggested by crosbyman
I think I’m going with Vishay Dale RH05050R00FC02

[Author]

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