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- This topic has 2 replies, 2 voices, and was last updated 4 years, 6 months ago by garry-in-michigan.
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October 6, 2019 at 12:48 pm #184722
Looking for info on how the shift lever works. Drawing shows a dog clutch but do not know what it does. The motor is always in gear with lever in either position. However when in natural position and I turn over motor it turns about 3/4 of a turn and stops as it comes against some type of stop very solid and metal. Move back to in gear and turns motor as it should.
Can some tell me how to get to the dog clutch and how to tell if knob turning on shaft or shaft not turning dog clutch?
Thanks for any and all help at a stand still on getting motor running.Jim Benjamin
October 10, 2019 at 9:46 pm #184990The way a dog clutch works is to slide into spaces in the gear. The forward and reverse gears are both engaged with the pinion gear on the drive shaft. The pinion drives them in opposite directions.The dog clutch is in the middle and when in neutral does not touch either one . When the shift lever is moved to forward, it pushes the dogs against the forward gear. (The motor should be idling at this time.) The dogs will then drop into spaces between the dogs in the gear. The patent was on how the clutch is moved. OMC used a yoke coupled with a right angle lever to transfer the up and down of the shift rod to the forward & backward motion of the dog clutch. Scott Atwater used a hollow prop shaft with a step tapered cam on the end of the shift rod engaging the spring loaded dog clutch with a rod through the center of the prop shaft. Mercury Used a hollow shaft but rotated the shift rod to change gears. I believe the Ted Williams outboard uses the Scott system. (It went from Scott to McCulloch to Chrysler.) Check out the Chrysler service manual for an idea of how it works.
- This reply was modified 4 years, 6 months ago by garry-in-michigan.
- This reply was modified 4 years, 6 months ago by garry-in-michigan.
- This reply was modified 4 years, 6 months ago by garry-in-michigan.
October 10, 2019 at 10:12 pm #184997P.S.– if it jams in neutral, it must use the “Economy” clutch which is a flat square piece of steel and can become twisted if the tension spring behind it is rusty and weak. Not exactly square. it has a bump on one end to engage the spring, and a dip in the other the engage the push rod.
- This reply was modified 4 years, 6 months ago by garry-in-michigan.
- This reply was modified 4 years, 6 months ago by garry-in-michigan.
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