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Firing order

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vroei

02-19-2001 00:06:09




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Hello,

(still waiting for the manuals to arrive...)

I replaced the secondary wiring from the distributor to the plugs but got a little confused about the firing order of the Standard Motor Co petrol engine on my MF-35. I marked the # 1 and #4 wire on the distributor, put the new wires on and tried to verify the timing before putting the cap back on. On the MF-35 you seem to have to line up the hole in the flywheel with the hole in the casing (under the starter) and then adjust the points to just open. The first time I alined the holes the distributor was pointing towards the lead for what I believed to be #4 instead of the supposed #1. The second time I tried it it was pointing towards #2. The specs I found on this site state a firing order 1-3-2-4. I am a little confused here about which cilinder is #1 (the one near the seat or the one at the front of the tractor (my guess)).

q1:Which cilinder is #1
q2:Is there a way to see the the engine is at the right position, without removing the valve cover, so the distributor will point towards #1?

Thanks

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Thyge

02-19-2001 06:33:47




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 Re: Firing order in reply to vroei, 02-19-2001 00:06:09  
As far as I recall firing order is 1-3-4-2
Cyl. 1 is near the radiator.
I usually unscrew the spark plug of cyl. 1 and using a piece of welding wire sense when the piston is at the top position. This may then be correct or at exhaust cycle, therefore I put a finger over the spark plug hole and turn the crankshaft back and forth a little. If you have sucking and farting sounds at the hole it is OK, otherwise turn crankshaft a full revolution and test again.
Points should open between 0 and 5 degrees before top.

Good luck Thyge
Taageskov
Denmark

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Jim/Mississippi

02-19-2001 21:22:27




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 Re: Re: Firing order in reply to Thyge, 02-19-2001 06:33:47  
Good suggestion but use a rubber hose inserted into #1 plug hole as one could accidently get finger "sucked" into cylinder head during intake stroke with quite painful results!
I have heard of this actually happening!
Just put your finger over other end of rubber hose for safety :-)



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Thyge

02-20-2001 12:21:54




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 Re: Re: Re: Firing order in reply to Jim/Mississippi, 02-19-2001 21:22:27  
Of course you must NOT place your finger over the plug hole when cranking with the starter - I just wiggle the crankshaft by hand using the fan/belt, no plugs in the other three cyls either.
But sure thing, the rubber hose is super.

Thyge
Taageskov
Denmark



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Vroei

02-20-2001 02:57:48




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 Re: Re: Re: Firing order in reply to Jim/Mississippi, 02-19-2001 21:22:27  
Thanks for the tips. I think I will go for the hose solution! I read on a reaction that some people do not like the modern silicon automotive plug leads to the distributor. What do you think about that?



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Jim/Mississippi

02-20-2001 19:55:09




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 Re: Re: Re: Re: Firing order in reply to Vroei, 02-20-2001 02:57:48  
The spark plug wire of choice would be a solid core conductor type. The covering of silicone is an advantage over original materials.
These tractors , having point type ignition, were never designed to be used with resistor type (Carbon Core) conductor type of wires.
Solid core is the way to go for shure, the covering is not as important, however. Good luck with the project! :-)

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