Corroded solenoid connections

doraymefa said:
I can assure you this is the solenoid attached to the starter motor on a Nanni 4.50.
Thanks for the warning re disconnecting at the battery - I had already clocked that but very good to be reminded.
The engine is not old, but this connection is hidden and I noticed the corrosion when working on something else. It just happens to be in line to be dripped on when I change the pencil anode on the exhaust.
I have committed the sin of asking AI about the ‘knurled terminal nut’ in this set up and it suggests that the plastic is only a cap and underneath I will find an honest nut.
This has been a great reminder to me about the importance of pottering about the boat with open eyes and how good this community is when helping, thanks everyone
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Can you post a pic showing the starter motor ?
 
Refueler said:
And WD40 does not stink ??

Anyway WD40 is crap and only good for spraying into padlocks !! There are far better products out there ...
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WD40 is not crap, it's a useful general purpose product, that's why it sells. And it doesn't stink as bad as diesel!
 
penberth3 said:
WD40 is not crap, it's a useful general purpose product, that's why it sells. And it doesn't stink as bad as diesel!
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WD40 is good when used as designed .... as a Water Displacement fluid ... it has no other benefit whatsoever ...

AND once used - its strongly advised to apply suitable lubricant / other product as finishing ...

It sells because originally it was a good product - but now since the Greenies have had a go .. its crap !

I can recall many times in the Car Service - I had a deal with Service Owners that I would assist mechanics in return for use of the service gear to maintain my Race Car - cars coming in that were hard to start ... or we would go out and tow in a car that would not start ...
Guess what - majority were victims of over-use of WD40 .... people would spray loads into distributors thinking they were protecting from water etc. Mini's / 1100's were particularly prone to water in distributors ... but the WD40 literally gummed up the points and contacts .. making high resistance.

I used to flush out with cleaning fluid ... dry and put back .... starting back to normal.
 
Sandro said:
Is it not? I always used it and it seems working.
Let's clear the matter, may be someone else can help.

Diesel is surely good and CRC 6-66 also.
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'Ordinary' WD40 is not intended to be a penetrant, although it may make a difference if used as such. However, a range of products is marketed under the WD40 name, one of which is a penetrating oil. I have a can of it in my workshop.
 
vyv_cox said:
'Ordinary' WD40 is not intended to be a penetrant, although it may make a difference if used as such. However, a range of products is marketed under the WD40 name, one of which is a penetrating oil. I have a can of it in my workshop.
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True .. I forgot that they have various other products under the WD40 banner now ...
 
Cudos to PaulRainbow. After a few days soaking, the thumbscrews came away relatively easily. I then un bolted and removed the starter and solenoid - leaving behind the corroded part in my original post!
What is it, with it’s electrical connection?
 

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doraymefa said:
Cudos to PaulRainbow. After a few days soaking, the thumbscrews came away relatively easily. I then un bolted and removed the starter and solenoid - leaving behind the corroded part in my original post!
What is it, with it’s electrical connection?
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Thanks for posting the pics.

As per posts #7 and #8, oil pressure sender, i think. Most likely pressure gauge, rather than warning light. You can test for that by shorting the two wires together.

Or, could possibly be for the rev counter. If shorting the wires does not make the warning ligh come on or make the pressure gauge read high, disconnect one wire (when you get the terminals free) and see if the rev counter still works..
 
doraymefa said:
Cudos to PaulRainbow. After a few days soaking, the thumbscrews came away relatively easily. I then un bolted and removed the starter and solenoid - leaving behind the corroded part in my original post!
What is it, with it’s electrical connection?
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If you refer to the wiring diagram you should be able to identify it from the colour of the wiring.

1770520364665.png
 
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WD40 is now a brand that sells a few products under the WD40 name, one of which is a dedicated penetrating oil. They even make a low odour product. The original WD40 that we all know about, love and hate, wasn't just a water displacement formula, it was also a penetrating oil and light lubricant, according to the blurb. The original WD40 was made as a rust prevention product by displacing water and leaving behind a protective film.

https://www.wd40.com/history/
https://www.wd40.com/products/?category=bike,multi-use,specialist

To the OP, if the nuts get damaged, there are plastic covers available on the Internet to buy.
 
Refueler said:
WD40 is good when used as designed .... as a Water Displacement fluid ... it has no other benefit whatsoever ...

AND once used - its strongly advised to apply suitable lubricant / other product as finishing ...

It sells because originally it was a good product - but now since the Greenies have had a go .. its crap !

I can recall many times in the Car Service - I had a deal with Service Owners that I would assist mechanics in return for use of the service gear to maintain my Race Car - cars coming in that were hard to start ... or we would go out and tow in a car that would not start ...
Guess what - majority were victims of over-use of WD40 .... people would spray loads into distributors thinking they were protecting from water etc. Mini's / 1100's were particularly prone to water in distributors ... but the WD40 literally gummed up the points and contacts .. making high resistance.

I used to flush out with cleaning fluid ... dry and put back .... starting back to normal.
Click to expand...
It couldn’t do any gum up? It’s white spirit essentially I believe which evaporates eventually. I used to use it on my mini diz and never had an issue. It used to use a flammable gas as a propellant and was handy as a diesel engine starter but nowadays it doesn’t work so I think they have changed the propellent. As Vyv says, I also have a we lube type can on board which I like.
 
Beneteau381 said:
It couldn’t do any gum up? It’s white spirit essentially I believe which evaporates eventually. I used to use it on my mini diz and never had an issue. It used to use a flammable gas as a propellant and was handy as a diesel engine starter but nowadays it doesn’t work so I think they have changed the propellent. As Vyv says, I also have a we lube type can on board which I like.
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It most certainly did gum up stuff .. once the propellant and solvent evaportes - it left a small amount of residue ...

If used in moderation - normally no issue - but some people literally doused the items in it ... then believe me - it did cause problems. I cleaned loads of Mini and 110 distributors because of it.

Yes - the propellant was banned based on Greenies arguments ... with the old formula - it was a less harsh starting fluid than ether based.
 
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