68 evinrude 55hp lower unit kicks out of gear

4

4reyburn

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Jul 24, 2003
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6
I have a 68 evinrude 55hp hydro-electric shift motor. when I got it I changed the oil in the lower unit it was very dirty. It runs good for about 30 to 40 min. Then the motor speed up and the boat slows way down. It sound like it kick out of forward. When I slow down to around idle it sound like it kicks back in. I was told I could clean the lower unit by running diesel fuel in it for a few min. Is this a good ideal. Or is there anther problem?
 
rolmops

rolmops

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Re: 68 evinrude 55hp lower unit kicks out of gear

Hello.<br />It does not seem a very good idea to run that engine with diesel in the lower unit.Try to just change the lower unit oil with C-type lower unit oil. Run it a while, drain it, and change it again with C-type lower unit oil.That should clean your lower unit.If you still have problems of it slowing down ,it is time to check if you spun the hub on your prop,or a lower unit overhaul.
 
4

4reyburn

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Jul 24, 2003
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Re: 68 evinrude 55hp lower unit kicks out of gear

If I spun the hub on the prop. Would it work fine for about 30 to 40 min. an then start slipping.
 
T

The Marine Doctor

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Jul 25, 2003
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2,177
Re: 68 evinrude 55hp lower unit kicks out of gear

You could have weak solenoids in the gearcase...or the pump is dirty..I am not sure about running any kind of cleaning solution through it as there is rubber and plastic on the pump.<br /><br />TMD
 
rolmops

rolmops

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Re: 68 evinrude 55hp lower unit kicks out of gear

The spun hub was wishful thinking.
 
4

4reyburn

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Jul 24, 2003
Messages
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Re: 68 evinrude 55hp lower unit kicks out of gear

the manual said to full up the lower unit then take out 1oz of oil. I took out 2oz and now it is running ok. is this ok or is this bad on the unit?<br /><br />thanks for the help so far.
 
C

Cricket Too

Lieutenant Commander
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May 14, 2003
Messages
1,732
Re: 68 evinrude 55hp lower unit kicks out of gear

If the manual says to take out 1 ounce then I would probably listen to it. Fill it back up take out 1 ounce and see how it performs.
 
B

Buzzy McGraw

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Jul 28, 2003
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Re: 68 evinrude 55hp lower unit kicks out of gear

I have a '66 80hp elec shift and I can relate to your problems. I,d say from what happened to mine several times is that one of the springs in the gearcase between the solinoid & gear has broke! Causes it to kick out and when you back off the throttle it can kick back in. Probably the front spring- thats forward. LOL
 
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