I’ve done lots of searching for the size of the oil drain plug washer. (Crush Washer) Looked in the service manual as well as the owners manual. Just seems to say it needs changing after each oil change. It’s mentioned many times in forum posts here as well. Couldn’t find a size or part number though.

Can anyone help me out with a size for my 2010 Rancher TRX420FPA and an online source? My Honda Dealer is about 20 mi. away and I’m not in a hurry as I just changed the oil. Unfortunately I changed oil about 5 times already and just found out I should be changing that washer at least every other time. Would like to purchase about 20 of the washers. I’m looking closer at the owners manual to see what other maintenance I’ve been slacking on.

I would also appreciate the size of the o-ring seal for the oil filter if someone may have that.

Thanks in advance for any input… 🙂

Mike