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When was the water pump last replaced? I replace mine every spring. Go to an auto parts store and get a spark gap tester. Under $20. Set the gap to about 3/8" and try it on all cylinders. If the spark can jump that gap, than your ignition system is fine. If the spark is fine then you've...

Why was the carburetor replaced? Did it have the problem before the carb replacement? Are you 100% sure it's the correct carburetor? At full throttle, are the butterflies completely horizontal?

You can leave it there forever. It's not going to go anywhere. You don't actually ever have to touch it again.

When the motor starts to crank and fires, it begins to move faster than the starter motor is turning it. That drives the gear on the starter motor down. I don't remember if you've done anything with the carbs. If you get it firing again, I'd spray some starting fluid in the carbs. If that...

No idea what carb gasket has to do with timing. Please explain.

Sorry guys if I steered the guy in the wrong direction. The last 3 motors I've had have all been V-4's. I didn't even think about this being an inline 3. Thanks for catching that. Glad y'all caught that before he attacked it and broke of bolts unnecessarily. Sorry about that misinformation...

You've already posted this once before. I think we all understand the problem. Several have asked if there is any way to adjust end of the cable that's in the control box. A couple asked if there are different locations to connect the throttle cable in the control box, like longer or shorter...

check the plugs and see if they look different. Is one getting flooded and the other look fine. The spark gap tester is a great test of ignition system. I had a 15' dual console Cobia and it ran about 30 MPH with a 55 HP evinrude on it. No idea what pitch the prop was, but pretty sure the...

So, it does make noise when you try to tilt down? So the motor is working when you press the "down" button? But it does go down when you loosen the relief screw? That's odd. I usually think of the down movement as sort of "passive". The motor pumps oil into the cylinder to raise the piston...

I would have probably opted for taking the exhaust cover off first. It's easier to remove and you could have seen the side of the pistons through the exhaust port in the side of the cylinder. There are two bolts all the way down at the bottom that are pretty tough to get to. There should be...

Ignition switch would not explain the lack of power to the tilt/trim. On Yamaha, I'm pretty sure the voltage for the tilt/trim comes straight from the starter solenoid, not from ignition switch.

If it funs fine at full speed, but two cylinders aren't firing at idle, I would second exactly what jimmbo said. Flyingscott, he already posted his compression figures. This should help: https://www.boats.net/catalog/johnson/outboard/90hp/vj90mlesb-1990/carburetor

He must be equipped with the limited slip differential driveshaft option!

I've checked the reed valves openings and other things before, but I've never actually had to replace any before.

How is the motor running? What are the symptoms, or is it just an observation on your part and the motor is running fine? What do the top spark plugs look like compared to the bottom? Any sign of top looking like it's running lean/rich?

So, several days ago, the first recommendation was to get some penetrating oil down in there where the drive shaft slides into the motor, and you haven't done that yet? You'd probably have it apart by now if you had done that. spray some "PB Blaster" or WD40 or some other penetrating oil (I...

The ideal operating range for that motor is 4500 - 5500 RPM's. To increase RPM's, you need to reduce the pitch. You haven't told us what prop you're actually using, so it's hard to tell you what you need to use. Pitch is the forward movement you should get out of one full revolution of the...

What was the problem with it? Brushes look almost new. I've seen them worn down till nothing was left of them. A rebuilt kit usually just consists of new brushes and new bushings. If the bushings wear out, the shaft can get off center and it won't perform well. Get sandpaper and clean up...

We would hate to see you spend money unnecessarily. My dad had a boat for over 20 years. He wore out 3 outboard motors on that boat, but he never replaced the standard old evinrude control box. those things just don't have a lot of "technology" in them and they are frequently replaced. We...

Fantastic find! You've got a great starting point. I'd replace points, condensers, coils plugs and clean the carb and replace the impeller and it should be as good as new.