My Evinrude bangs at high rpm!

[dipple]

I have a '61 Evinrude Fastwin 18hp that 2 summers ago started and ran perfectly until I tried to go beyond trolling speed. That's when it starts to bang and clunk like its jumping out of gear. Afriend took apart the lower unit---we replaced some worn gears, replaced the gasket, and got the unit in ship-shape. Still clunked! We then replaced a burnt out coil, thinking we had it solved. Still clunked! My friend thinks it must be in the upper unit somewhere and something he didn't have time for. Basically, I can't afford a new motor. What could it be and is it worth takng in to a shop? Please help. Thanks

 

[fireman57]

Re: My Evinrude bangs at high rpm!

If it feels like you are hitting something under water then it probably is a bad clutch dog. Was everything replaced in the lower unit? All installed properly? Do you have a manual?

 

[Laddies]

Re: My Evinrude bangs at high rpm!

Did you replace the clutch dog and yoke? That sounds like the problem and you didn't meantion replaceing it in the original repair.

 

[rwise]

Re: My Evinrude bangs at high rpm!

and make sure the linages are adjusted properly<br /><br />Welcome to Iboats!

 

[dipple]

Re: My Evinrude bangs at high rpm!

It does feel like I'm hitting something. I do have a manual and my friend John thought the clutch dog was alright. Is that an expensive repair if I have it replaced? I'm definetely confidant in John's expertise. He had just got rid of his tanks and equipment so he is pretty much retired from working on motors. Thanks for the feedback! I just got layed off today so I have lots of time to fish but a definate lack of funds

 

[fireman57]

Re: My Evinrude bangs at high rpm!

Repair is not that difficult especially since you have a manual and someone with some mechanical expertise. Price the dogs at your local dealer. They shouldn't be that high. Hope your luck with the job gets better and you catch lots of fish.

 

[papasage]

Re: My Evinrude bangs at high rpm!

my 33 hp 1966 had a loose linkage under the power head . does it do it in foward and reverse or just one. some motors you can reverse the shift dog . have seen some re cut by a machinest the gears also <br />where the dogs go in . papasage

 

[OBJ]

Re: My Evinrude bangs at high rpm!

Sometimes just replacing the gears with the worn lobes is not enough dipple. If the gear lobes are good but the dog lobes are wore, it can still slip in and out of gear. One way to find out is to hold the gear shift lever on the motor and get underway. You will be able to feel the thing jump if it is the gears jumping out.