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Ignition timing /420T

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Robert

11-08-2002 16:02:16




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I recently had the distributor rebuilt ,and now cant seem to get it back in time(simple inexperience).I find #1 TDC (with timing mark)but I evidently dont know at which point on the shaft to set the points. The way I see the shaft is one "flat" followed by single lobe then a "flat" then the remaining shaft is raised so the points stay open.I'm sure everybody 's gonna get a kick out of this simple problem but I'm bout to pull my hair out over it. Thanks for all comments. Robert in La.

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Clooney

11-08-2002 19:33:01




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 Re: Ignition timing /420T in reply to Robert, 11-08-2002 16:02:16  
Robert, IF the distributor drive coupling was installed by the repair shop so the offset is in the correct location [I don't have a manual handy where I'm at now] but I believe the offset should be to the left with the rotor contact facing you], & the oil pump/dist drive hasn't been removed or re-timed, the distributor should only go in & mesh one way. Once it is in & the drive has engaged, rotate the distributor body so the wire terminal is facing out & away from the engine block [hook up the primary wire to the coil]. Then bring the #1 piston to just before TDC on the compression stroke & the word SPARK is centered in the timing hole, then install the rotor & take either spark plug wire complete with a spark plug & plug it into the coil tower of the coil, then lay the plug on the block or frame where you can see it, then turn the key on, then grab the rotor & turn it as far to the left as you can, then while holding the rotor to the left turn the distributor body until the wire terminal is almost to the generator then slowly back to the right until you get a spark from the plug, then tighten the distributor clamp, then hold the cap up to the distributor in the same way it would install & make sure the rotor is pointing close to the terminal that the wire would be in that goes to #1[ front] cylinder. If the rotor isn't pointing to [or close to] #1 cylinder you have a problem with either the distributor side drive coupling or the oil pump drive. I don't know how clear this is so think it over & look at the parts & post back with questions.
~Once it is running [think positive] you really should use a timing light to check & re-set the timing.
~Now that I told you all the above I usually just install the distributor & point the primary terminal straight out & away from the engine, then assemble the rotor, dust shield & cap then try to start it, most times it will start there [if not I move the distributor a little one way then the other & try again] . After it is started I set it to fast idle & use a timing light to make final timing adjustment.

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Wayne in Tn.

11-08-2002 17:43:41




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 Re: Ignition timing /420T in reply to Robert, 11-08-2002 16:02:16  
Robert, I too would like to see someone (maybe Clooney) post the complete timing procedure. I would like to print it out. My book is not clear, but it does say you have to use -- Timing tool # AM450T to time the oil pump before timing the dist. I wonder if you can make this tool or if you can still get one. I have one tractor that someone must have the dist. 180 degrees off, because the ignition wire post is turned aganist the block. It runs fine this way, but would look better if it was in correct.

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Robert

11-08-2002 18:13:08




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 Re: Re: Ignition timing /420T in reply to Wayne in Tn., 11-08-2002 17:43:41  
One of the reasons I'm puzzled with my situation (other than my general lack of engine knowledge)is that when I got the distr. back , it's not going to be in the same general position as when I removed it ,I took good care to mark it and not turn the engine over ,but I didnt consider that maybe the oil pump gear would be in different position , so I too may have a case of the point to coil wire being against the block instead of turned out.....good point about oil pump needing to be timed as well ...I didnt know that either....oh well I know it'll run so I'm not gonna give up...Thanks for the comment. Robert in La.

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Henry j

11-09-2002 12:42:47




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 Re: Re: Re: Ignition timing /420T in reply to Robert, 11-08-2002 18:13:08  
Robert

If you havn't cranked or turned the motor over since you took the distributor out, it should be a drop back in deal, since the driving lugs of the distributor are off center and will only drop in one way.



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