Tweet
hi there , would be driving about half speed then i would get a big surge in motor like i hit a piece of wood then it would be fine for another 5 min then surge again ... was told it wouldnt be lower end dog gears or it would happen all the time.. was told pulse pack or power pack ? anyone have this issue ? thanks in advance its a 1990 100v4, also while im asking need a new forward reverse control cable are they oem take out and put in or.....
-
-
If it feels like your engine is hitting a submerged object every so often at the higher rpms BUT no problem exists at the lower rpms, the engine is jumping out of and back into gear.
(Centering Shift Cable)
(J. Reeves)
When all is as it should be, the proper method to adjust the shift cable is to disconnect the cable from the engine. Move the shift linkage on the engine to find the center of the play in neutral, and when found, leave it centered.
Now, grab the end of the shift cable sleeve, push and pull it to find the center of the play there, and center that play.
Adjust the trunion on the threaded portion of the shift cable so that the centered play of the cable lines up with the centered play of the engine's shift linkage. Install and lock the shift cable with the retaining clamp in that position. That's it.
Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay auction at:
joe_omc32 | eBay
********************
(Jumping Out Of Gear - Manual Type)
(J. Reeves)
This pertains to lower units on all OMC manual shift outboard engines, or any OMC engine with lower units defined as a Shift ***ist or a Hydro Electric Shift unit which incorporates a "Shifter Clutch Dog".
Within the lower unit, splined to the prop shaft is what is most often referred to as a clutch dog, hereafter simply called dog. The dog has at least two lobes protruding from it on both ends, facing both forward and reverse gear. The forward and reverse gears also have lobes built into them near their center area. When the engine is running, in neutral, the gears are spinning constantly via the driveshaft being connected directly to the powerhead crankshaft, but the propeller does not turn due to the fact that the dog is centered between the two gears, and the dog lobes are not touching either of the gear lobes.
When the unit is put into either gear, shift linkages force the dog (and its lobes of course) to engage the lobes of the gear. The lobes of the spinning gear grab the lobes of the dog, and since the dog is splined to the prop shaft, the propeller turns.
The lobes of the dog and gears are precisely machined, most with right angled edges that could be installed in either direction, and some with angles slightly varied that must be installed in one direction only (one end only must face the propeller). Dogs that can be installed in one direction only, if reversed, even if the dog and both gears were new.... would jump out of gear almost immediately. Keep in mind that the lobes are precisely machined with sharp angles!
Due to improper adjustment or worn shift linkages, but usually due to improper slow shifting, those precisely machined sharp edges of the lobes become slightly rounded. Now, with those lobes rounded, as the rpms increase, the pressure of the gear lobes upon the dog lobes increases to a point whereas they are forced apart (jumping out of gear), and due (usually) to the shift cable keeping tension on the engines shift linkages..... the unit is forced back into gear giving one the sensation that the engine has hit something, and the cycle continues.
Some boaters with manual shift engines have the mistaken belief that shifting slowly is taking it easy on all of the shifting components..... Wrong! Shifting slowly allows those precisely machined sharp edges of the dog and gears to click, clank, bang, slam against each other many times before they are finally forced into alignment with each other..... and this is what rounds those edges off! The proper way to shift is to snap the unit into gear as quickly as possible.
Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay auction at:
joe_omc32 | eBay
******************** -
i thank you... so what iam getting from this is that it could be just my shifter cable which is screwed anywaycause i can go forward and reverse and nothing then i play with cable then she goes in gear i also can see where cable came out a little from front of motorComment
-
Nothing more I could add to what I've already said. Let us know what the final outcome is.Comment
-
cheers thanks again and i will let ya knowComment
Comment