Mariner 30hp - lost all power at prop!

[whisper]

Hi, I have a Mariner 30hp 2 stroke (around early 90s) which was going fine until I was going along at ¾ revs then it lost propulsion, it was like as if it was in neutral but the engine was still revving but without any load. The prop is new and the shaft that the prop bolts to does not turn either. It’s like it just popped out of gear!

Does any one know what could be wrong?

[Polwart]

Originally Posted by whisper

It’s like it just popped out of gear!

someone more knowledgeable may be able to shed some light - but from your description it could be that the rods/cables that connect the gear lever to the gearbox have become disconnected.

[whisper]

I’ve had a good look and the gear leaver on the side of the engine still moves backwards and forwards ok but it’s not going into gear.

[Polwart]

Originally Posted by whisper

I’ve had a good look and the gear leaver on the side of the engine still moves backwards and forwards ok but it’s not going into gear.

there are a series of levers/rods that transfer the movement from the side of the engine, down the inside of the leg to the gearbox.

[sam12345]

We had the shift rod on a mariner 75 snap in the gear box casing below the seal.
If everythings alright and moving okay under the cowling, then you can work your way down the changer rod to under the powerhead by the transom. If this moves as well then your problem is in the actual gearbox itself.

[whisper]

Originally Posted by sam12345

work your way down the changer rod to under the powerhead by the transom.

How do I check this?

[Downhilldai]

Have you also lost reverse gear?

As others have said, it sounds like the gearshift mechanism has disconnected or broken, somewhere. I'm not sure of the detail on this actual motor, but there will be a connection point in the gearchange rod somewhere in the leg, which allows the lower unit to be removed. This may be the cause of your problem. The connection can be a clevis pin, threaded rod or clamp. Have a poke around and you'll find it somewhere between the tray below the powerhead and the lower unit.

[Bigmuz7]

Underneath the powerhead .. the main shaft goes down into the gearbox through the leg .. it is splined where it receives into the powerhead, sounds like its sheared there and you have no gears what so ever , usually just below the splines, below the power head..unless ... do you still have reverse ?

[Bigmuz7]

Feck I'm a slow typer

[uncle al]

ring me at work if you want to 01869 326411 have your serial number ready