502 help please
 

Would like to test my new boat today but I'm concerned about it freezing.Still a little cold here in colorado,never know what the weather will do.

I know how to drain the exhaust manifolds as I can see the drain plugs.Where would the drain plug be on my block.I sure cant seem to find them.It's a 99 502 mag.pictures would be great too.Thank you.

I don't know them all but make sure you don't miss the ones on the back of the exhaust manifolds.

Should be in the middle of the block ( just above oil pan and below exhaust manifold).

Just put the muffs on and suck thru 4 gal 50/50 anti freeze. Done.

There are 2 pipe plugs,or might be pet cocks about 1" or 1 1/2"above the oil pan rails on the port and starboad side of the block . If you take them out and no water runs out push a small screw driver in the holes till the water runs out.Sometimes these holes skim over inside the block with rust and sediment, JOHN

Aren't the heads of the drain plugs painted blue?

unless someone changed them, the stock 1999 502 Mag has the blue nylon/plastic drain plugs with the wing nut type top so you can take them out without a wrench. There is one in the bottom of each exhaust manifold, one under the cool fuel, and one on each side of the block. The block ones are right above the pan rail, toward the middle of the block.

LOL thats what we do after Fla. in the winter works fine never had a prob. Not exactly environmently good but it works.

Don't forget to drain the oil cooler also:D

Thanks everyone.I found the two blue wing type plugs on the exhaust manifold and two copper pipe type plugs on the block.Just drained everything and it's all good.You guys are the best....thanks!

Did you drain the oil coolers, seawater pump, & recirc. pump?
If not, pull the hose off the bottom of the recirc. pump and it will drain it. Then remove both hoses from the seawater pump to drain it. Then drain the oil cooler by simply removing the hose on the low end.