A little confused D17 engine

ddk114 · Mar 11, 2016

D17 226 engine in a 1968 Gleaner EIII combine. Have been a little confused why it always seemed to lack power, muffler always glowing red with blue flame, always laboring. Yesterday it quit. Traced it out to the points not grounding through, and distributor cap center electrode gone. Needless to say it got new points and condenser, cap and rotor. The new rotor is a little different than that was on it. Instead of having a straight electrode to the plug terminals, the new one had an electrode that was curved, sort of sickle shaped. I questioned that, and verified from the book at NAPA for myself that it was indeed the correct one. Well, it took right off after the install and has been running perfectly ever since. It starts easy, runs free and easy, more power than it ever had, working temp is lower, and the glowing muffler has gone away. I suspect the old rotor was incorrect and had it running out of time. This thing was such a gas hog. I don't think that the points, condenser, or cap would have that effect, but the rotor could. I was just wondering if anyone else ever came across something like this.

teddy52food · Mar 11, 2016

Rotor can't change the timing but the advance weights may have been stuck & came loose as you were working on it???? Sounds like it needed a good tune-up.

leroy in ne · Mar 12, 2016

incorrect point gap affects timing. if I figured right to wide timing is advanced, if to close timing is retarded which can cause engine to labor, run hot and be low on power as fuel is ignited late and will probably still be burning when exhaust valve opens and continues burning in muffler

CTucker · Mar 15, 2016

That rotor with the "tail" on it was designed for the hand crank tractors to minimize the possibility of kick back on the crank. It has no effect on timing or how the tractor runs once fired up.

Ted J · Mar 18, 2016

(quoted from post at 23:07:49 03/11/16) D17 226 engine in a 1968 Gleaner EIII combine. Needless to say it got new points and condenser, cap and rotor.

Have you got the Numbers for these from the boxes? Thanks!

A little confused D17 engine

ddk114

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teddy52food

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leroy in ne

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CTucker

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Ted J

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