1994 70hp Evinrude - new starter

[Daveynz]

I have had this motor for a couple of years and had some work done in, cleaned the carbs, new impeller etc. It's always been a terrible cold start, (electric) especially in the water. But once it's been started for the day it will started again no worries first pop.

The other day my starter completely stopped working, sounded like it stripped out as it would engage flywheel but make a screeching noise and would not turn the motor over. I ordered a new one online and installed with no issues. It started fine in driveway with muffs on, but when I took it to the beach for the first time it engaged flywheel but seems to not have the power to fully turn the flywheel. It started smoking so I gave it a rest and cracked the motor by hand with a rope wrapped around the flywheel. After it got it going and warmed it up, the motor would start with the starter first time no issues. This didnt happen. With the old starter, and it seems only an issue with a cold motor in the water....

The voltage at the starter is 12.8v dropping to 10.5 when cranking. I have a new battery with all new clean connections, so I'm confident theres enough juice getting to starter...unless 10.5v is not normal?
I'm worried the new starter is underpowered for the motor, it is aftermarket, but a proper replacement part for the original.

Any ideas, I don't want to blow up another starter, and starting with a rope is no fun!

 

[racerone]

You are pushing the key in WHILE cranking it over for a cold start ?-----I would take the old starter apart for inspection , to look for an answer.-----And be careful with that flimsy cast flywheel as they are easily damaged on the gear teeth.----Maybe you have damaged the new starter already !

 

[StarTed]

Racerone has given you some good information already.

I might add that the voltage sounds like that part of the system should be OK.

Could be that the starter drive got stripped in the old starter. The smoke from the new one sounds bad. You might try moving the drive gear from the new starter to the old one. Be careful with the alignment when installing the starter to not damage the gears.

Pushing in the key turns on the choke. That is necessary to get sufficient vacuum at the throat of the carburetor to bring in extra fuel for cold starting. The key must be pushed in and held in while cranking. When it fires, release the key back out. if it begins to die, give it a quick push back in for a second. Hope that helps.

 

[racerone]

??----Pushing in the key opens a valve.----AKA primer solenoid.-------When that valve is open fuel from the fuel pump is sprayed into the air going into the engine.------This fuel bypasses the metering circuits in the carburetors.-----There are no choke flappers to " get sufficient vacuum " on a 1994 model 70 HP motor.

 

[StarTed]

Sorry racerone. I was thinking of an older model.

I think the idea is similar. A richer mixture for a cold engine. In any case, the electrical circuit must be functioning properly and used.

 

[oldboat1]

Think I would take out the plugs and rotate the flywheel clockwise by hand. See if you can find a point where the flywheel wants to bind.