Spark Plug Tubes: Question about Transom Plug

[stateofidleness]

Maybe I'm not understanding how this plug works...

If it fits going in, how does it "grip" coming out?? Wouldn't it need to "expand" or something to create the grip?

[The Radium King]

it's a 1" diameter rubber puck with a flat washer on each side. a bolt runs through the puck and joins the two washers. as you tighten the bolt the washers come together and compress the puck. the compressed puck squeezes outwards and seals the plug in the tube.

i found that, as i tightened the plug, it would expand inside the tube until i heard a 'pop'; that was the o-rings that hold the tube in place letting go. once they released it all pulled out without effort.

[stephe57]

Originally Posted by stateofidleness

Maybe I'm not understanding how this plug works...

If it fits going in, how does it "grip" coming out?? Wouldn't it need to "expand" or something to create the grip?

There's actually about a 10mm edge on the inside of the spark plug tube. The tool will just barely grab that and when you keep steady pressure on the tool it pulls it out

[rem503]

A marine supply store will carry them. It made the job of removing and reinserting the tubes soooo much easier.

[stateofidleness]

Finished the job today. Easy Peasy.

If you've ever changed brake lines on a 914, you'll know the "tool", but it's one I made by bending over the tip of a flat-head screwdriver. Tool did the treat for this job as well. They "popped" right out with no trouble at all. Some automotive grease on the new ones and some "heavy" leaning on them with a broom handle, they slipped right in with ease.

Degreased and cleaned the engine really well, buttoned it all back up and ran it for about 10 minutes, then took it for a spirited run. Came back clean as a whistle.

Calling this one a success!