Removing prop to run on muffs?

[ricohman]

I want to run the 4.3 merc on my boat before heading to the water for the 1st splash so I bought a set of muffs. The instructions state to remove the prop.
Is this just the standard wording so the manufacturer isn't liable when someone chops of their hands doing something stupid?
Or do I have to remove the prop?

 

[Levinz11]

Re: Removing prop to run on muffs?

I want to run the 4.3 merc on my boat before heading to the water for the 1st splash so I bought a set of muffs. The instructions state to remove the prop.
Is this just the standard wording so the manufacturer isn't liable when someone chops of their hands doing something stupid?
Or do I have to remove the prop?

Legalities! NO one takes their prop off to run the engine on muffs.

 

[UncleWillie]

Re: Removing prop to run on muffs?

Put on the muffs.
Lay out the hose WELL clear of the prop.
Do not turn the hose on full blast or the Muffs may blow off when the motor is not running.

DO NOT put it in Gear!
Do not rev up over 1500 rpm and then only up to 1500 to keep the engine from stalling.
Do not allow anyone within 12 feet of the prop.
That means 2 full body lengths. And that includes the dog!
The prop will likely not rotate at all, or it may rotate slowly from the friction on the prop shaft.

Just respect the prop, be safe about it, and you will be just fine.

 

[ricohman]

Re: Removing prop to run on muffs?

Thanks guys.
I kinda figured I should be able to run the motor on muffs without removing the prop.
I can see why they would put that in the instructions through.

 

[Oshkosh1]

Re: Removing prop to run on muffs?

Trim down the drive also...
Remember, when the engine is running, so is the driveshaft, and u-joints. Keeping it trimmed down will reduce wear/stress on the joints, even at "low" RPM's

 

[choppywaters]

Re: Removing prop to run on muffs?

What they all said,lol

 

[roscoe]

Re: Removing prop to run on muffs?

Legalities! NO one takes their prop off to run the engine on muffs.

Actually. some people do.

I even do it if I am demo-ing a motor and there are people/kids/pets in the area.

But I usually use a test tank, so the muffs are seldom used.