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Dirty_Harry 06-22-2009 02:25 PM

70 horse evinrude trouble
I just acquired an older boat with a 70 horse evinrude on it and i have an issue with it. It will not take off. It will not go above 3200 rpm in gear. I checked the plugs and cylinders and they are all firing. Does anyone have any clue as to what is wrong?


(yeah its a two stroke triple)

OCR 06-22-2009 03:13 PM

How's the compression?

mach1 06-22-2009 04:33 PM

see if anything is stuck behind the prop.rope or wire?

blue avenger 06-22-2009 05:26 PM

older as in points?

Linkage hooked up to advance the timing?

Ibreakstuff 06-22-2009 09:36 PM


Originally Posted by blue avenger (Post 75610)
older as in points?

Linkage hooked up to advance the timing?

^^^Make sure your linkage is all correct. If it isn't, it'll retard the timing so it won't rev out.

Check compression first though.

2sewings 06-22-2009 11:52 PM

The older 70hp triples had a fuel delivery problem, sometimes it was a choke problem or the carbs were toast! Ask Greasemonkey, he gave up on his and found a 60hp Merc that outdid the old Johnson!

greasemonkey 06-23-2009 06:52 PM

How old of a motor??
I had a 1988 Evinrude VRO and if was a pain to keep tuned. The timing is real critical on them.
They had problems with idling and running to lean at low RPM's
When they are tuned right, they are great but when they screw up, they are a pain in the ass to get running right.
Finally got rid of mine and got a 1999 Mercury 60HP bigfoot. Lost 10 HP,gained 10 years and gained 5 MPH. Plus power tilt.
Find someone local that knows what they are doing with them and have him tune it up.
Check the compression first. If the top cylinder is lower than the rest, get rid of it.
The VRO stands for variable ratio oil( or something like that). At idle, they can run as lean as 120-1 ratio and leans out the top cylinder.

wallygator 06-23-2009 09:57 PM

What year is it, I have a 1983 70hp johnson on my boat

Dirty_Harry 06-25-2009 02:30 PM

Sorry for the long reply guys....i have to do all posting from my phone. I am mechanically dumb so i do not have the tools or knowledge to check the compression. I am fairly sure the motor is a 76 also thanks.

Slamdry 06-27-2009 07:30 PM

does the boat have a primer ball in line from the tank to the motor?? if so i have seen them go bad were that vaccume shut under heavy load and cut off fuel supply. happened to me once, and a few times on the rentals i worked on.

Dirty_Harry 06-30-2009 12:56 PM

It does....however that is not it, unless the fuel line is bad for my little outboard....and it not. I am going to take it somewhere and get ripped off I know, but I cannot afford to get another motor. Plus I probably could not get a lot out of this one.

Dirty_Harry 09-09-2009 05:45 PM

Well, after several trips to the marina guess what the problem was?

My flippin prop was too big.

blue avenger 09-11-2009 09:54 PM

LOL or your boat is to heavy

Dirty_Harry 09-16-2009 09:24 AM

Not funny lol.

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