94 OMC Cobra 5.7 Outdrive Jerk.

[Eric Guilloz]

My 94' OMC Cobra outdrive has a very intermintant jerk. Happens a couple times and hour. As I pull a skier up, it feels like the rope gets slack and gets tight again. It is not the rope since I can see it, but that is a way to explain the feelilng. The Engine dose not seems to cut out. Feels like possible Prop rubber hub slipping. Anyone had a concern like this. Thank You

 

[seahorse5]

Re: 94 OMC Cobra 5.7 Outdrive Jerk.

It sounds like the clutch dog and forward gear are jumping out of engagement due to wear and/or improper linkage and cable adjustment.<br /><br />If so, the only true fix is to replace those items and thoroughly check out the linkage, along with the boat operator's shifting technique.

 

[Eric Guilloz]

Re: 94 OMC Cobra 5.7 Outdrive Jerk.

Thanks for the reply. I understand that cable adjustment can cause hard shifting and The clutch dogs can cause a miss engegment. This is a problem that happens after engagment and when heavy throttle applied.Only Jerks 1 time like a missfire but engine is not. Thanks for the replys

 

[marunr]

Re: 94 OMC Cobra 5.7 Outdrive Jerk.

I would also suspect the clutch dog and gear. I replaced mine a few years ago due to the same thing you are describing. It would only do it coming out of the hole, and only occasionaly. However, it will get worse.

 

[Lou C]

Re: 94 OMC Cobra 5.7 Outdrive Jerk.

Are you sure the drive is actually a 1994, since that year they changed to the cone clutch Volvo design (joint venture). The original Cobras 86-93 were dog clutch designs. <br />Sometimes a 1994 boat will have a 1993 drivetrain in it.

 

[tylerin]

Re: 94 OMC Cobra 5.7 Outdrive Jerk.

Check to see if the two hex-head pivot pins on the pivot housing are tight