1962 75 hp Evinrude V4 "CLUNK"

schwab7

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I own a 1962 V4 evinrude 75 hp outboard. When on the water after kicking it into gear about every 3 seconds or so while driving the motor "clunks" You can actually see the motor and hear it "clunk" I have been told a few different things that this could be. The one that seems to make the most sense is that I need to replace the "Shift dog" I am hopefull that this is the problem because that would be an easy fix. Please give me you opinions on this matter. Also ask any questions that you will need to know.
 

rickdb1boat

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Re: 1962 75 hp Evinrude V4

Re: 1962 75 hp Evinrude V4

Sounds like a clutch dog. Does that motor have mechanical shift?
 

F_R

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Re: 1962 75 hp Evinrude V4

Re: 1962 75 hp Evinrude V4

That's the clutch dog alright. But don't get so excited about it being an easy fix. The dog never wears by itself. It always wears the forward gear too. You are only kidding yourself by thinking otherwise. There are lots of creative "cures" out there, but don't think they are all worthwhile--though they may be worth trying in light of the fact that the gear costs more than the motor is worth. Not much to lose.
 

schwab7

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Re: 1962 75 hp Evinrude V4

Re: 1962 75 hp Evinrude V4

Yes it is a mechanical shift. I have a few questions for Petty officer. Are there any of those creative cures that you can help me out with "point me in the right direction" I have a guy that will sell me an intire motor for 200. I am going to see if it will stay in gear and then go from there. But if that motor is not going to work I need a way to get mine up to par as close as it can be.
 

schwab7

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Re: 1962 75 hp Evinrude V4

Re: 1962 75 hp Evinrude V4

Also is there away to test out the outboard using a big trash can of water. I know that I can take off the prop and then run the motor and put it into gear. However, my question is this, because I will have no load on the motor will the motor "shift dog" work fine until I get it into the lake. The guy said that he will check to make sure that it stays in gear, but dont I need to put a load on it to check?
 

F_R

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Re: 1962 75 hp Evinrude V4

Re: 1962 75 hp Evinrude V4

Absolutly. It has to be actually pushing a boat..at wide open throttle. I will say that worn dogs are very common on OMC motors.
Some people will say just turn the clutch dog end for end. That doesn't address the worn gear issue. Likewise, it's foolish to put an expensive new dog against a worn gear. Now this next one is workable in some cases...On some motors you can swap the forward and reverse gears by swapping the bushings inside them. That, combined with turning the dog end for end often works because reverse usually isn't worn as bad as forward. Sorry, I can't say if that's possible on your motor. Also, #3 plan is to take the gear to a machine shop and have the dog recess reground. That works for awhile, but is short-lived because the hardened surface is ground away. But if you are very careful with shifting, you may get some use out of it. If you do decide to spring for new parts, update it to the dog with detent grooves. Prop shaft drilling is required (another machine shop job....very difficult to drill)

Speaking of shifting, the correct way to shift is to have the motor running dead-slow and shift with a snappy decisive movement. NEVER "ease" it into gear.
 

schwab7

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Re: 1962 75 hp Evinrude V4

Re: 1962 75 hp Evinrude V4

What is the best way to tell if the Dog is worn out. I am looking into a used lower end but I want to take it apart before I buy it. What should I look for?
 

F_R

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Re: 1962 75 hp Evinrude V4

Re: 1962 75 hp Evinrude V4

A "shifty" seller. Seriously, there's no way to tell. And even if it is holding ok now, it might be right on the verge of jumping out. Once it jumps the first time, it's rapidly downhill from there.
 
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