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  #1  
Old 08-31-2013
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Talking ignition starter solenoids

Does anyone have part #'s for the two solenoids that are on the cross member forward of the starter on a 85 PT36?

Have searched for several days on the forum and just cann't seem to find any. It would be great the have them on hand when I take them out.
I am also not sure if they are continous and or intermittent. The ones on my BB both have 4 post, therefore I think they are both externally grounded-Correct?

LOVE OLD SCHOOL

Hope someone can help!
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1985 PT36'
2014 F150 4X4
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  #2  
Old 08-31-2013
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Yes, they are externally grounded. I would highly recommend getting a sealed one like this-

I replaced both of mine earlier this year. One goes to the 3 psi oil pressure switch and the other is connected to the A/T switch up front. I'm pretty sure that the solenoids are "grounding" through those two devices when conditions are OK to start.

http://www.waytekwire.com/item/77003...OUS-DUTY-SPST/
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  #3  
Old 08-31-2013
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Because a store is about 5 miles from my house...West Marine:

http://www.westmarine.com/webapp/wcs...yword=solonoid

I used the epoxy coated type for one mounted near the steps (battery combiner as I recall) and have had 5+ years good service. For the ones mounted in a protected/interior location...the un-coated likely would be fine.

On the road when in need...I've also scored RACOR filters at West Marine .
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  #4  
Old 08-31-2013
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Talking THANKS

Thanks Shane/Frank
Will hit the road and get a couple tomorrow, I hope.
Since their for the starter circuit I think they should be intermittent,
Right?

Thanks again for your input!!!
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  #5  
Old 09-01-2013
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You can use the constant ones. They have heavier contacts anyway. I did with no problems.
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  #6  
Old 09-01-2013
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Quote:
Originally Posted by sfedeli View Post
You can use the constant ones. They have heavier contacts anyway. I did with no problems.
Yep, Continuous duty , cost more, Gotta be better.
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Old 09-01-2013
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Thanks again Shane and Bill!!!
for helping to lead me in the right direction

See ya at Pine Mountain I HOPE!!!
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  #8  
Old 09-02-2013
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Hi Jeff,

For what it’s worth, I think the continuous duty solenoids will probably work ok in your application but I will point out (at least for future reference) that continuous duty solenoids are not always a better choice:

http://www.colehersee.com/home/faq/faq/solenoids/

Can you use a continuous duty solenoid in place of an intermittent duty solenoid?

Always use the component designed for the job. However, yes you can use a Continuous Duty Solenoid, but it would have a shorter life expectancy compared to the purpose-built Intermittent Duty Solenoid. But you cannot use an Intermittent Duty Solenoid in place of a Continuous Duty Solenoid!



http://www.jamestowndistributors.com/userportal/show_product.do?pid=10169

Continuous duty solenoids are wound with very fine wire and draw very little amperage. The contacts in continuous duty solenoids will usually have a lower amperage rating than that of the intermittent duty type. These are normally used as tilt trim relays. This type of solenoid can also be used for a variety of applications where a remote relay is needed to power a motor or other device.

Intermittent duty solenoids are wound with much heavier wire and draw more amperage. The contacts have a very high amperage rating. If these stay energized for extended periods of time they heat up and eventually burn out the coil inside the solenoid. This type of solenoid is normally used as a starter motor relay.
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  #9  
Old 09-02-2013
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Talking THANKS JOHN

John:
That is a great post and I thank you for the info. It helps to really clarify what I have read in the data base's an other threads. Very concise and I understand your points.
On my BB there are two solenoids on the frame rail in front of the starter.
I'm guessing that the bottom one is intermittent and the top one is constant.
In that, according to the starter diagram provided, I believe by Shane, the lower one leads to the solenoid on the starter itself.
I really prefer to give my BB the proper eq., especially when it comes to such important things, like solenoids, etc..

LOVE OLD SCHOOL

Safe Travels
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2014 F150 4X4

Last edited by Jeff; 09-02-2013 at 03:07 AM. Reason: wrong designation
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  #10  
Old 09-02-2013
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I agree, John makes some great points. If you can get hermetically sealed solenoids like the one in the picture that are rated for intermittent duty, then go for it. The original ones from BB were coated in some type of clear epoxy resin and were designed for a marine environment. Mine had some green corrosion around the side screws, but still were in fair shape. I was beginning to notice some hesitation at start-up when I turned the key, so I replaced the front-rear switch. That did not get rid of it. Then, I moved on to replace the 3 psi oil pressure switches and solenoids. That made all the difference.

It looks like this might do the trick- http://www.waytekwire.com/item/77023...RMITTENT-DUTY/

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Last edited by sfedeli; 09-02-2013 at 07:39 AM.
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