Re: 1999 Volvo Penta DP Oil Drain Bolt oring mystery
Volvo changed the style of the drain plug later on in model years. Mine is an LK and you have to be really careful putting the o-ring on or it will get cut. What is your model number?
On mine, you have to roll the o-ring over the threads so I wrap the threads in electrical tape and then roll the o-ring on so it doesn't get cut up.
This what yours looks like?