Drain plug on 1992 evinrude crossthreaded.

[guemphops]

I or the previous owner of outboard crossthreaded the drain plug. I tried to tap the threads with the same size tap ast the drain plug and it made it worse. The drain plug is 3/8 inch, What would be the next to bigger size to re-tap and get a bigger drain plug and Where to get it.

 

[Solittle]

Re: Drain plug on 1992 evinrude crossthreaded.

The drain plug to what? Also you told us that the engine is a 92 rude - what hp?

 

[guemphops]

Re: Drain plug on 1992 evinrude crossthreaded.

It is the drain plug for the lower gear oil, and it is a 25hp. I looked everywhere on the internet for a 7/16 drain plug, but no one list the drain plug by the plug size. Any help appriciated.

 

[R.Johnson]

Re: Drain plug on 1992 evinrude crossthreaded.

It's the head of the screw that does the sealing, you may have to have one made. Another thought would be to measure a 7/16 cap screw, as to head size.

 

[DHPMARINE]

Re: Drain plug on 1992 evinrude crossthreaded.

Most gearcase drainplugs are in a recessed,machined cavity.I think trying to go oversized to 7/16 is a mistake. The cavity isn't big enough.

I'd look into Heli-Coil - ing it to the original 3/8 size.Even that is risky,as the hole has to be drilled oversized to accept the Heli-coil threads.The drainplug head/gasket surface may be marginal.

But a new 1992 25 HP housing (bare) is over $900.00. So think carefully before chucking up your drill.

DHP

 

[Solittle]

Re: Drain plug on 1992 evinrude crossthreaded.

Take it to a machine shop. That is their thing.

We have one nearby and the owner worked there untill the day he died a few weeks ago - - at age 86. His son now runs the place. For those in Miami the place is called Mitchel's and is near the Falls..