My 50hp cyrysler outboard motor won't go into reverse it goes in neautral and will go forward?

Question

When in forward a soon as I give it full throttle it stalls out. Not sure what to do.

Answer 1

adjust the throttle cable

Answer 2

First pull the prop. Some real early ones had shear pins, latter called alignment dowels. They would bend and jam up the gearcase.  Always us a good prop nut. Next: they had a small bronz yoke about 1/2" square with a rounded slot in the middle.It is hidden deep inside the lower unit. This slipped over a mushroom headed rod the slid down the middle of the prop shaft and was roll pined to the clutch dog. They used to wear and get so sloppy the clutch would not reach both gears. So you could adjust it to run forward or run reverse, but not both. Next; The shift cable attached to a contrapsion that had an interlock to keep the throttle from moving much when you were in neutral. All this stuff is under the carb. Lots of room easy to get at. The shift adjuster is on a round anchor towards the middle of the motor.It is a ball and socket that threaded in and out on the end of the controll cable.  If you can keep you feet out of the prop, you can stand back there with the engine running on water ear muffs and shift and throttle everything till you can figure out the next direction to look. The carb problem is pretty well covered-sounds like the main jet is pluged.. Depending where you live, there are lots of these in barns and laying around-a quick wanted ad should get you a  parts motor.  Most of the parts interchanged thru the 35, 45, 55 hp models. This is one of the few outboards that used a wedge/hammer approch to taking off the flywheel. The wedge only supported the flywheel while the biggest hammer you have just tapped the crank shaft to vibrate the flywheel off. Use a thread protector.(send the gorillia out for bananas)  Set points to .20. Do not believe the timing sticker. It was dropped 5 degrees years ago, so time it to 26 to 28 or less.  Remember- you can't hear and outboard detonate. So if your out running and that giant hand comes out of the sky and slows your boat down- don't try to drive it home with out finding out why.

Answer 3

This may be a linkage problem, but I'd check the prop first.  Are you saying that the engine dies when you give it throttle in forward.  Or, that the boat just want go.  This engine has a reputation for a very dependable gear case, so I'd be suspicious of hitting something.  In which case there would be prop damage.  If, there is water in the gear case oil, it's probably gear and bearing failure.  I'm not sure it's worth repairing if that's the case.  Your engine is what 20-25 years old???    I think you could find a used boat for what it would cost to fix yours, if it is the gear case.   Good Luck!!!

Answer 4

Mangled gearbox.

Drop it off and dismantle to find the problem.

Answer 5

Disconnect shift cable at the motor, see if you can shift it by hand.  if not, sounds like you'll have to tear it down for inspection.

Don't know about your motor in particular but in general, motor dies when you go full throttle, first thing I look at is the spark advance linkage.  Might be sticking.  If the carb butterflies start opening before the timing advance, it'll fall flat on it's face.

Then see if pumping the primer bulb makes it run, if so then rebuild fuel pump.

If it's a 2-cyl, could be a cylinder dropping out (3- or 4-cyl usually just bog down).  Either spark failing under load, hi-speed carb jet clogged, or low compression on a cylinder.