Piston Stop #384887

[cdnfthree2]

Are there any substitutes for this part. I want to tune up my motor but I am as cheap as they come?

 

[Dhadley]

Re: Piston Stop #384887

We use what they call a motorcycle timing tool. All it is, is an adaptor that screws into the spark plug hole and then a dial indicator goes in the adaptor. You rotate the piston until the needle stops, then reverses and you've found TDC. Way quicker than using the stop.

 

[cdnfthree2]

Re: Piston Stop #384887

Wow those things are expensive. I'm wondering if any piston stop with the same threading will work.

 

[iwombat]

Re: Piston Stop #384887

On the cheap, you can just get yourself a long spark plug and bend the electrode out.

 

[cdnfthree2]

Re: Piston Stop #384887

On the cheap, you can just get yourself a long spark plug and bend the electrode out.

Ok, when you say long plug I'm guessing that I'd run it deeper than normal??!? I own an OEM manual now but I still don't know what I don't know about motors. Thanks for help

What about this http://store.summitracing.com/partdetail.asp?autofilter=1&part=PRO-66792&N=700+115&autoview=sku

 

[ezeke]

Re: Piston Stop #384887

The one at this link is more like the OMC/BRP piston stop: http://store.summitracing.com/partd...&part=PRO-67581&N=700+309974+115&autoview=sku

 

[luisdiaz]

Re: Piston Stop #384887

On the very ship and fast side,, I used a stick of wood (those used for meat). Marked a place (on the fly wheel) when the piston was going down. Keep the stick while rotating the flywheel (clockwise) and mark when the piston touched the stick in it's way up. The middle between those 2 marks is tdc.
Regards

 

[Benny1963]

Re: Piston Stop #384887

dial indicator harbor freight 30 dollars with base.

 

[cdnfthree2]

Re: Piston Stop #384887

Very helpful info everyone. Thank you

 

[D.spencer]

Re: Piston Stop #384887

Not trying to hi-jack this thread, but I was under the impression that it was a bad idea to turn an outboard engine backwards due to possibly making the waterpump vanes rotate (turn about/change the set direction) the wrong way and thusly the waterpump would not work anymore. Am I thinking wrong?

 

[ezeke]

Re: Piston Stop #384887

You are not thinking incorrectly, but as soon as the water pump runs in water at any kind of operating speed, the vanes kick back into position. The problem is that bending the vanes back and forth weakens them.