With the prop removed, you will expose the bearing carrier retaining nut. This nut must be removed, (screwed out of the housing), it has righthand threads. With a puller, the carrier can now be removed from the gear housing. The propshaft seal(s) can now be removed, and replaced with new. Be sure to replace the carrier o-ring while you have the carrier out. Use a sealer, such as gel seal on the outside edge of your prop seals when you install them. Also, don't be afraid to use some grease when you reinstall the carrier and retaining nut.
right behind the prop, on the same shaft
$1000
A 4 hp Mercury outboard, produces a true 4 hp, rated at the prop.
yes mercury made a 260hp engine. it is a 2.5 ltr v6 2 stroke, the early carby models made 245hp, then went efi which made 260hp at the prop, 7500rpm redline. then they bought out the same block with different porting and electrics around 1999ish. this engine made 280hp @ the prop. these engine are race engines. not your normal fishing outboard
The 9.9 hp Mercury outboard requires a special flusher, and removal of the propeller is suggested for ease of installation. You can use a regular flusher if you position it just right, (the water pick-up is located underneath the anti-ventilation plate, above the prop), but I find it easier to use a barrel or waste can.
401.2 without prop
To replace the propeller seal on a 15 HP Mercury outboard, first ensure the engine is off and securely supported. Remove the propeller by loosening the prop nut and sliding the prop off the shaft. Next, take out the old seal from the propeller shaft housing and clean the area. Install the new seal, making sure it fits snugly, then reassemble the propeller and nut, ensuring everything is tightened properly before testing the motor.
It's good to repair it as it protects your lower unit and prop. However it won't affect handling. It is not a rudder, it is a prop protector.
If you have a blueband mercury 4hp engine,remove the bottom section of the leg (just above the prop) you will find x2 11mm nuts. Undo both and pull apart,you should find that the gear rod and drive shaft come out of a black piece of plastic housing. Undo the x2 (8mm) retaining nuts and remove the housing. Inside you will find the impeller (6 bladed rubber spider) £17.56 from any mercury dealer or £8.00 online.. Hope this helps
To remove the thrust washer from a 1997 Force outboard motor, first ensure the motor is securely tilted and supported. Then, remove the propeller by unscrewing the prop nut and sliding the prop off the shaft. Once the propeller is removed, you can access the thrust washer; gently pry it off the shaft using a flat-head screwdriver or a similar tool, being careful not to damage the surrounding components. If it's stuck, applying a little penetrating oil may help loosen it.
Replace the shear pin.
To determine the year of a Mercury 40hp outboard motor with the serial number 2877503, you can refer to Mercury's serial number lookup charts, which typically indicate that this serial number corresponds to a model from the mid-1980s. Specifically, it is likely from around 1986. For the correct propeller size and pitch, you should consider the specific application and boat specifications, as well as consulting a marine professional for recommendations.