4D61 - need thread size

[Don from Mystic]

I would like to install a Fumoto, valve/lever operated oil drain plug on my '83 Famiily cruiser. Would like to have it in-hand when I change my oil for winter lay up. The manual for the 4D50/61 lists both 16 and 18mm but I dont know which mine has. Anyone know? Many Thanks, Don

[jleonard]

Don't know. But an option is to do what my son often does. Buy both and return the one that doesn't fit.

[Don from Mystic]

Was to be an Ebay purchase. will ck around here for them-

[Fortunate]

Don,

When you find out, please post. I would like to install the same thing.

Kim

[Don from Mystic]

Hi Kim, Pulled the boat last week. Thread size is 16mm. Amazon was less than Ebay at 26.00 (get the one with the nipple). Looking fwd to less mess. I will Plum it to the bulkhead via copper tubing/hose before I comission in the spring. Will try to take some pix to post. A Happy Holiday and quick winter to all!

[Don from Mystic]

I installed the new valve today, just before I tied down the cover for the winter It fit great, with plenty of clearance. I was very impressed with the valves construction and will no longer have to drain the oil into a plastic shoe box and then pump it from there!