oil drain plug
 

Does anyone know what size the threads are on a oil pan drain plug for a 500 EFI motor are?
Are they 1/2-20? Summit racing offers an oil drain pet cock that looks like it would work for me but I'm not sure of the thread size of the one that's in there.
Cardshark

If the 500 efi is a gen VI pan like all the other big blocks, then no, it is not 1/2-20. I tried it.

Late model pans are 12mm X 1.75 I believe.

Craig

Craig is right. they're 12mm X 1.75

it is the 12x 1.75mm
I just ordered two drain hoses from Overtons :)
Tired of pumping out the oil from top
Now I will just be able to let gravity do the work like in all my old boats :)
Merc got smart when they added this hose to the new 496's :)

I'm just jealous that you guys can get to the oil pan drain at all...

SUCK IT OUT !!!!!!!!

rick32

MNfastboat... I have seen these drain hoses used a cool way.. searay does it.. They have the end of that drain hose attached to a fine 1/16 wire cable that is attached to back of the drain plug, when you pull the plug you can pull the hose right out the drain hole, undo the cover and drain it right in a pan.. It might be harder with twins..

Dyno prefers to blow 'em up before he needs to change the oil. :D :D Doesn't need to winterize that way either.

I just installed the Merc drain kit on my HP500EFI. Merc makes two kits, and I am 99% sure I used the metric one. It is a slick set up, but you still need to warm up the motor to drain the oil, as that hose is still pretty small to fit through the bilge drain hole. When you are installing these, have the tongue wheel on your trailer all the way up, maybe resting on a cinder block. There is still almost at full quart left in the pan when you suck it out the dipstick. When you pull the plug, you want to contain this slick at the back of your bilge. A nice idea I found out about (after I did mine), was slice a flat anti-freeze jug in half, and lay it under your pan, when you pull that original drain plug out. It will help contain the oil left in the pan.

Brian

I DONT KNOE WHAT MERC GETS FOR THAT KIT BUT THE FITTING FROM WEST MARINE IS 26.00.AND YOU STILL MUST MAKE YOU OWN HOSE. I DONT THINK YOU CAN GET ANY CHEAPER THAN THAT.

TAZ,
I bought my hose from Overtons. It is complete with 3' hose for $15. My cap did only screw on by 2 threads, so I ran a pipe tap deeper for a piece of mind.
Sydwayz is right on the slow draining of cold oil. I try to drain after returning from lake.
Jerry
http://www.overton.com/cgi-bin/overt...arge.cgi?30334

[ 02-01-2002: Message edited by: US1 Fountain ]

US1 WOW I JUST LOOKED IT UP YOUR RIGHT.I CANT BELIVE THEIR THAT CHEAP.I SEE WEST MARINE HAS A COUPLE OF SIZES THAT OVERTONS DONT.SOMETIMES I NEED TO SHOP MORE. :cool:

I just ordered one from Eddie Marine, $18.

here is the part # for the new oil drain kit from mercury quicksilver 863143A 4 this is a metric thread kit!!the best invention since the wheel!! BILL :p :p :p :p :p

A question about the oil drain tubes. Do you guys just let them lay in the bilge? Or do you hang them up somewhere, maybe with a tie wrap?

I made my own. I just bought a new drain plug, drilled it out the tapped it. I put a shut off valve on the end of the plug then a hose that I could pull out the bilge drain hole.

I just went back to the old way ,sucking it out, I got tired of the oil seeping out of the hose and makiking a mess out of my bilge. I couldn't get 2 hands down there to put a plog in the end of the hose. If you can reach the end, you can stick a cork in it.

i hang mine up with a tie until i change oil! other wise it lays in water most of the time!! BILL :p

Since I just push it back inside thru the drain hole after draining the oil, it just lays on the bottom. It doesn't move around or anything either.