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Fiat 55L Pilot motor 23 Sep 2020 15:19 #214919

  • Fiat55L
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Hi all
Just wondering if anyone out there has had much to do with the ignition system on the pilot motor of a 55L Fiat crawler..It is a Magnetti Marelli .. Have lost spark , trouble shooted all the way back through the basics ( clean contacts, sound copper wire and new plugs) after trawling through other forums have seen another similar post discussing remagnetising the magneto? This is new territory for me. Havnt been able to make contact with these posters from 2011.

I have owned the machine for 15 years when I inherited it with a bush block.. We have done alot of work together , been through good times and bad but Ive always managed to keep her alive and not ready to accept defeat and her retirement yet. The main engine has and always did run like a dream and the tracks and runing gear are in good condition. If I could just get the pilot motor back in action ..

If anyone has any advice on remagnetising, the ignition system or knows of any of these pilot motors sitting around I be so appreciative. Would give me alot more confidence to start messing with the finer workings of the magneto etc if I had a spare exhange as back up so I didnt mess up the timing forever.

Cheers
Matt
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Last edit: by IHScout.

Fiat 55L Pilot motor 23 Sep 2020 15:52 #214920

  • Swishy
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  • If U don't like my Driving .... well then get off the footpath ...... LOL
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Go grab the Mrs or dog n get m to hold the buisness end of the wire n turn the motor over
if the dog yelps U kno U got a bit of V
if the Mrs yelps U kno U n the dog will B share n the kennel
LOL
have U tried cleaning all the earths etc .... magneto ... pilot motor .... main engine
leave the blade up n tow/push start the beast

cya
OF ALL THE THINGS EYE MISS ................. EYE MISS MY MIND THE MOST

There's more WORTH in KENWORTH

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Last edit: by Swishy.

Fiat 55L Pilot motor 23 Sep 2020 16:00 #214921

  • JOHN.K.
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You wont be able to remagnetize the magneto yourself ....needs specialized gear.....If you have eliminated the usual causes ,then its likely the capacitor has failed ,probably shorted.......If the mag hasnt been off the tractor ,its not likely to need remagnetizing......Need some pics of the mag,but its likely a Bosch copy.......You can just use the mag as ignition points with a coil and battery.
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Fiat 55L Pilot motor 23 Sep 2020 16:06 #214922

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Cheers John

Im away at sea atm could add a few pics when I return . The pilot motor is pull start - no starter motor. Good exercise when you are fault finding ignition trouble . :)

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Fiat 55L Pilot motor 23 Sep 2020 16:08 #214923

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Yeh done all that Swishy - cheers

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Fiat 55L Pilot motor 23 Sep 2020 18:45 #214929

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Had starter engines on old piston compressors, think they were Wisconsins. Had they had not been used for some time they barely had any spark, we would just hit them with 12 volts and that woke them up.
Cheers Steve
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Fiat 55L Pilot motor 23 Sep 2020 20:36 #214932

  • Mrsmackpaul
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Does maggie look a little like this ?

www.prewarcar.com/34135-magneti-marelli-magneto-parts-for-fiat

Paul
Your better to die trying than live on your knees begging
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Fiat 55L Pilot motor 23 Sep 2020 21:37 #214934

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Hi Paul

Similar but not the same , from what I can gather from the photo. I'll take a few photos when I get home.

Cheers - Matt

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Fiat 55L Pilot motor 23 Sep 2020 22:33 #214938

  • cobbadog
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There is so much more to a magneto than just the points. AS for the magnets, yes they can loose their strength but if you drag a screw diver across the magnet and it is a bit of resistance to pull it away then the magnets should be good enough. Your points must be spotlessly clean and then gapped correctly. If you dont have the specs for the gap start at 0.015". If the spark is there but not strong reduce the gap to being around 0.012".
The condensor/capacitor can fail and is the next thing to test or replace. Some condensors are built inside the armature and can be a bugga to get at if you don't know what your doing.
Next test the HT lead using a multimeter, Test between the inside of the cap to the terminal that fits to the plug. If this is faulty new, wire only HT leads can be bought easily along with new fittings easily.
Next is the coil. Again you will need a multimeter to test this on both the primary and secondary circuits.
Not sure where you live but there are stationary engine clubs around Australia and some clubs have members that can test it and confirm what the problem is and if needed charge the magnets which is a very specialised process to do and requires a re-charger to do it then depending on the magnets whether you need to use a 'keeper' on the magnets until they are fitted back together.
If this sounds daunting, it is but not impossible and Youtube have many videos to watch if you want to loose a few years off your life. The best solution is when your back on dry land contact the Maggyman over in South Australia. HE and his wife are fantastic, with service and price and would be well worth a chat to them or send them an email. I ahve had dealings with them in the past and it was a pleasure to deal with them both. I have no connections with this company other than being a very satisfied customer.
Let us know how you get on.
Cheers Cobba & Cobbarette
Coopernook, The Centre of our Universe.
COP-U-LATOR
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Fiat 55L Pilot motor 23 Sep 2020 22:41 #214939

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Thanks Cobba -
I'll give this a crack and get in touch with Maggyman.

Much appreciated

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