1969 evinrude 25 horse 2 stroke won’t start

[oldboat1]

https://maxrules.com/graphics/omc/wiring/18-25_EL-START_TO_1972.jpg

Note the solenoid wiring.

 

[Crosbyman]

I am sure he meant FW....

 

[oldboat1]

I have pulled many flywheels.-----Never leave the nut on.-----I doubt that the " crankshaft " will go flying off as per above post.

Ah, but it can when the tension is off the puller. (enough to bruise a knuckle, anyway.) And yes, I did mean the flywheel.

 

[racerone]

Never had one bounce on the floor !

 

[oldboat1]

good reflexes?

 

[airshot]

Airshot... all true except for some odd reason in all my refurbs (approx 20) I can't say I ever saw strong blue sparks mostly snappy yellows which allowed my refurbs to work quite well. I'll have to check closer on the next refurb.

Maybe I have been lucky the only time I ever had bad compression to stop an engine was on a 3hp blown head gasket (middle) .

In daylight they may appear more yellowish but in lowlight they should be more bluish to have a real hot spark. Not saying a yellow spark wont run an engine, but when someone says they have a really good spark and it is white/ yellow, then it is not a really hot spark!
Years back, my company was a source for Champion spark plug co. Had more than a few talks with their engineers and have always been told to look for a blue spark in low light conditions to know for sure you had a hot spark. That has served me well in my 70 plus years of playing with gas engines..

 

[Noblo88]

I followed the video on the point stetting/tuning. And still didn’t start, went to check spark and I had spark on one of cylinders and I can’t remember if last time I checked both or not but one cylinder has no spark. I am assuming this is possibly a bad coil? Or could it be from me tuning my points?

 

[oldboat1]

Check them both again, using the appropriate spark tester.

 

[Crosbyman]

clean the suspect points with a fine emery paper and rinse with carb cleaner. check proper continuity boot to engine frame (4-8 kohms) .

check continuity while rotating the mag plate in case you have a broken wire in a bend ...or did you replace them ?

 

[airshot]

Airshot... all true except for some odd reason in all my refurbs (approx 20) I can't say I ever saw strong blue sparks mostly snappy yellows which allowed my refurbs to work quite well. I'll have to check closer on the next refurb.

Maybe I have been lucky the only time I ever had bad compression to stop an engine was on a 3hp blown head gasket (middle) .

I agree, never had poor compression stop an engine, but have had low compression make them a real booger to get started. Many folks just put there finger over the hole and pull....yep..good compression ! Actual numbers are are easier to figure what is low and what is good.

 

[Noblo88]

Got a bad coil, bought one online today and should be here tomorrow hopefully it’s the fix. I will keep everyone updated thank you for all the help so far and helping with my lack of knowledge on these ol motors

 

[Noblo88]

Fixed the coil, points are all set to .20 on a feeler gauge and it almost starts but still doesn’t even with starter fluid. Both spark plugs have a big blue spark to them as well. Started at 1 1/2 turns out on the carb and kept moving out and still nothin all the way to 3 turns. Also anyone know what the little line from the bottom of the cylinder to the nipple on the top under the front part of the flywheel is for? I see some fluid tryin to make it’s way up that line

 

[racerone]

It is an oil recirculation line.

 

[oldboat1]

Fixed the coil, points are all set to .20 on a feeler gauge and it almost starts but still doesn’t even with starter fluid. Both spark plugs have a big blue spark to them as well. Started at 1 1/2 turns out on the carb and kept moving out and still nothin all the way to 3 turns. Also anyone know what the little line from the bottom of the cylinder to the nipple on the top under the front part of the flywheel is for? I see some fluid tryin to make it’s way up that line

Adjusting in the wrong direction. Adjust clockwise (leaner -- less fuel, more air) 1/8 turn at a time.

 

[Noblo88]

Adjusting in the wrong direction. Adjust clockwise (leaner -- less fuel, more air) 1/8 turn at a time.

I will give that shot shortly tonight and post back

 

[racerone]

Turn throttle till it hits neutral stop.----Remove sparkplugs.------Put 6 or 7 drops of fuel in each cylinder.-----Install sparkplugs and wires.-----Pull on the recoil a few times.----What happens ???

 

[Noblo88]

Adjusting in the wrong direction. Adjust clockwise (leaner -- less fuel, more air) 1/8 turn at a time.

A lot closer that time turned over a few times but didn’t run. I think I’m going to recheck my points and then check the timing with the continuity test

 

[Noblo88]

Turn throttle till it hits neutral stop.----Remove sparkplugs.------Put 6 or 7 drops of fuel in each cylinder.-----Install sparkplugs and wires.-----Pull on the recoil a few times.----What happens ???

I’ve been doing everything at the neutral stops/start position on the twist throttle. I think I need to double check my points and timing before and then I’ll give that a shot

 

[racerone]

You have to start doing some simple steps and orderly trouble shooting.----But I need to step aside here.

 

[davidmbv]

Turn the throttle to high and try to start. My motor a 71 25hp will not start unless I give it throttle then turn it down once it starts