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Antique Gas Engine Discussion

Amanco running problems


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  #1  
Old 04-17-2005, 12:40:31 PM
R. Goodacre R. Goodacre is offline
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Default Amanco running problems

I realize that most of the Amanco's in the States are Petrol hit'n'miss, but has anybody any ideas if the length or reach of the igniter points on a Petrol/Paraffin Hired Man (throttle governed) makes any difference to the running.
I am having problems getting my engine to fire reguarly, the best I can get it is for it to fire every 2nd or 3rd compression, even when a heavy load is placed on the engine.
**I am running on petrol only**
At first I thought it was the mixer, but trying a mates igniter in it had brilliant results, the engine started easily and ran smoothly-firing every time. So I stripped my igniter, cleaned every part, replaced the mica washers and tube and set the point gap as per the manual. The engine still refuses to go any better. Comparing my igniter with the one I borrowed the only visable difference is that mine is the normal short reach type as fitted to all petrol only models, and my mates is the long reach type, which should be fitted to Paraffin models.
I have contacted Keith Smigle on the matter, and he, like myself cant see that a slightly longer igniter would work any better than a short one, as compressed air/fuel mixture would reach it just the same. Has anybody any suggestions?
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Old 04-18-2005, 12:08:22 AM
BobRR BobRR is offline
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Default Re: Amanco running problems

See if your ignitor works in your buddies engine if so trade? BobRR
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Old 04-18-2005, 01:35:40 AM
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Ken Majeski Ken Majeski is offline
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Default Re: Amanco running problems

Check for.... Weak igniter springs, Lost motion due to worn or incorrect tapered pins. If someone has replaced one of the tapered pins with something else or if there is play where it isn't supposed to be it will give you fits....
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Old 04-18-2005, 04:21:14 AM
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Smile Re: Amanco running problems

Try swaping springs.

Dick
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Old 04-18-2005, 04:23:00 AM
Dick Welty Dick Welty is offline
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Default Re: Amanco running problems

Try swaping springs.

Dick
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Old 04-18-2005, 04:40:30 AM
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Patrick M Livingstone Patrick M Livingstone is offline
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Default Re: Amanco running problems

Check your intake valve spring tension and the exhaust valve timing.
Is the engine sucking fuel multiple times before firing? If it is the problem will more likely be in the fuel system than in the ignition.
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Old 04-18-2005, 10:32:38 AM
Dick Welty Dick Welty is offline
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Default Re: Amanco running problems

Hi,

After my sleepy reply at 1:23 am this morning I thought that an other explination if the Springs don't identify the problem is that these igniters as well as a lot of the other parts aren't made with very much precision and over the years there tooling changed greatly.

Try to mark on the flywheel exactly where your friends igniter trips then compaire that with your igniter trip time. You might find that if the trip hammer hole is a few thousandths off that it can change the actual timming a lot.

Good luck.

Dick
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Old 04-18-2005, 01:51:09 PM
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Keith Smigle Keith Smigle is offline
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Default Re: Amanco running problems

In case any one hasn't seen a long reach igniter since Throttle Governed Associated & United engines are scarce here in the USA, here is a pic of a comparison of both the normal and long reach igniters.
Attached Thumbnails
Reg ignitor and Throttler ignitor low res.JPG  
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Old 04-18-2005, 08:21:11 PM
Harvey Teal Harvey Teal is offline
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Default Re: Amanco running problems

Wow, those are pretty snazzy...never been fired...
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