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Started By
Message
Advice from Outboard Mechanics
Posted on 2/13/17 at 10:54 am
Posted on 2/13/17 at 10:54 am
I am trying to work a deal on an old boat. It is powered by a 1975 model Evinrude 70 HP. I tried to take the boat for a ride last Friday, but when it was shifted into reverse there was no power at all. It would not even get this little 17 footer off the trailer.
The boat sat for years so I am thinking that it probably needs to have the carburetor rebuilt and maybe a couple of other things.
What are your thoughts. Fix the engine? Scrap it and buy a new one? How should I proceed?
The boat sat for years so I am thinking that it probably needs to have the carburetor rebuilt and maybe a couple of other things.
What are your thoughts. Fix the engine? Scrap it and buy a new one? How should I proceed?
4
Posted on 2/13/17 at 11:06 am to MISSOURI WALTZ
So the motor was running but would not shift into gear?
Posted on 2/13/17 at 11:07 am to MISSOURI WALTZ
quote:
an old boat
How old? Is it in good enough condition to justify the cost of fixing up the motor, or possibly repowering?
Posted on 2/13/17 at 11:19 am to PillageUrVillage
The parts are dirt cheap. I have worked on these myself. If it runs fine in forward I would think it's not the carb.
Posted on 2/13/17 at 11:24 am to MISSOURI WALTZ
Evinrude's are cheap for parts and extremely easy to work on. Probably got a sticky throttle linkage. You can probably find a youtube video on it.
it should run down the back of the unit, connecting on the back of the powerhead near the crankcase, closer to the bottom of the third cylinder, I imagine it's a 3-cylinder. Then it runs all the way to the bottom of the lower unit.
95% of the time I worked on this the problem was near the top where the throttle cables interact with the linkage.
it should run down the back of the unit, connecting on the back of the powerhead near the crankcase, closer to the bottom of the third cylinder, I imagine it's a 3-cylinder. Then it runs all the way to the bottom of the lower unit.
95% of the time I worked on this the problem was near the top where the throttle cables interact with the linkage.
This post was edited on 2/13/17 at 11:27 am
Posted on 2/13/17 at 1:30 pm to MISSOURI WALTZ
I actually still have 95 evinrude 70hp sitting in the shop. I rebuilt the lower unit cost me $750 with new gears (most expensive part) rest is bearings and seals.
Sometimes if you don't put the shifter at the right height it won't shift in reverse.
I have the actual omc manual for my engine and it easy to read with the pictures that explains everything.
Now I switched that engine out for a 75 hp etec.
Sometimes if you don't put the shifter at the right height it won't shift in reverse.
I have the actual omc manual for my engine and it easy to read with the pictures that explains everything.
Now I switched that engine out for a 75 hp etec.
Posted on 2/13/17 at 1:37 pm to johnnyrocket
If it is one of the old electric shift models DO NOT BUY IT AT ANY PRICE!!!! A manual shift model is a very good motor but stay away from the ES model
Posted on 2/13/17 at 1:51 pm to Barneyrb
Here is a general response to everyone's questions.
The motor was running, but idling too low. I had to give it a little throttle at idle speed to keep it running. Then when I shifted into reverse it lost power and just "hummed." I did not get the chance to try the motor in forward gear.
The motor is forty years-old. If I can get it up and performing then that is what I want to do because I want it to be vintage. If not then I will replace it. The boat itself is in very good condition and the agreed upon price justifies my purchasing it even if I have to replace the motor.
It is manual shift.
ETA: The engine is a three cylinder / dual carburetor. The compression test turned out very good. All three cylinders showed matched perfectly at 90 when turning it over and 120 at wide open throttle.
The motor was running, but idling too low. I had to give it a little throttle at idle speed to keep it running. Then when I shifted into reverse it lost power and just "hummed." I did not get the chance to try the motor in forward gear.
The motor is forty years-old. If I can get it up and performing then that is what I want to do because I want it to be vintage. If not then I will replace it. The boat itself is in very good condition and the agreed upon price justifies my purchasing it even if I have to replace the motor.
It is manual shift.
ETA: The engine is a three cylinder / dual carburetor. The compression test turned out very good. All three cylinders showed matched perfectly at 90 when turning it over and 120 at wide open throttle.
This post was edited on 2/13/17 at 2:00 pm
Posted on 2/13/17 at 1:59 pm to MISSOURI WALTZ
quote:
The motor is forty years-old. If I can get it up and performing then that is what I want to do because I want it to be vintage.
See if the seller will allow you to have a mechanic look at it to get a complete picture of how much work needs to be done. Go from there.
Posted on 2/13/17 at 2:01 pm to PillageUrVillage
quote:
See if the seller will allow you to have a mechanic look at it to get a complete picture of how much work needs to be done. Go from there.
I just talked to a mechanic and he is going to take it out next week.
Posted on 2/13/17 at 2:03 pm to MISSOURI WALTZ
That's good. Hopefully it's some simple fixes. Best of luck to you. 
This post was edited on 2/13/17 at 2:04 pm
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