TEST PROP

[fastback4]

Can i use a cut down (decrease diameter) prop and use it as a test prop....i want to adjust my WOT timing on my 1999 merc. 60 hp 2 stroke

 

[Dhadley]

Re: TEST PROP

You really dont need to cut one down. Just back the boat in the water while on the trailer far enough to run the motor and have someone --slowly -- run it up as you watch the timing.<br /><br />Good luck!

 

[SeaDawg]

Re: TEST PROP

Could you just take the prop off?<br /><br />Or does the motor need to be under a load?

 

[fastback4]

Re: TEST PROP

my service manual says to time at idle and WOT @ 5000 rpm

 

[Yepblaze]

Re: TEST PROP

SeaDog, to run at WOT (wide open throttle) without prop it might get as high as 10,000 RPM which could explode the parts inside.

 

[rickdb1boat]

Re: TEST PROP

Do it like Dhadley said or buy a test prop. The only way to go, other than hanging off the back of the boat with a timing light while someone else drives it. Not recommended!

 

[SeaDawg]

Re: TEST PROP

Duh, I still needed my morning coffee. I missed the WOT part.

 

[rodbolt]

Re: TEST PROP

hello<br />some place in all my junk I have the specs that merc published in the mid ninties on how to cut the diameter from various pitch props to use as test wheels on engines from about 8 hp to 225hp. the specs are there and its a cheap test wheel<br /> good luck and keep posting. and yes if you try to throttle up a 200 hp merc on a wet ramp it will push the truck I watched that one