I'm on the fence to install the oil drain kit by replacing the drain plug with a fitting and hose attached.

OR buying an oil pump.

THis is for my 1998 500 HP

On my 454 Magnum, the sucker did nothing, so I put the drain hose in, worked great.

If I do buy the oil sucker, does it connect to the garden hose fitting on my dipstick? I assume that is what that is for?

And which pumps are good? (years ago I bought one for a 427, and it worked for 2 years, and after that garbage)

Build your own pump-------- Any Ford electric fuel pump will work just fine .Five gallon bucket with lid, stainless steel large hose clamp ,some clear plastic tubing of different sizes --cut small tubing at a 45 degree angle to fit into dipstick tube. Drill a few holes in the lid and strap the pump to the lid...get some wire and alligator clips to make connections to the battery and your all set to go ----will last for ever and the best part is it will only cost about $20 --- good luck




Jim

i use a vacula air vacume pump,,i do lots of oil changes on boats..need to warm engine first then suck it out..But theirs nthing better then the drain hose that you screw into the place of the drain plug..that gets all the oil out instead of 6 qts..

i have the oolder version of this one,,their is a manual one at the bottom that works good also..
http://www.mechanicstoolswarehouse.c...r-P138050.aspx

The dipstick mount type leave approx 1 qt still in pan. The suckers that use the smaller tube to go inside the dipstick tube are better, but slow.
I installed the oil pan drain hose kit and connect the hose end to my Jabsco oil change pump kit. In 30 sec my oil pans are sucked empty w/o a drop spilt

Which oil pan hose drain kit did you use?

I was going to use the same Sierra the I have on the old boat, but my understanding the 500HP has a metric tread, and the Sierra is imp.

I did see this one:

http://www.cpperformance.com/p-13339...75-thread.aspx




E-Z Oil Drain Kit - Fits Drain Plug Holes With Metric 12 X 1.75 Thread (Most Late Model MerCruiser Pans)

This kit is the answer to the job we all hate - oil changes. By installing an E-Z oil drain hose into your existing drain plug hole you simply pull the other end out the drain plug hole and drain the oil from outside your boat. It doesn't get any easier than this!






MSRP: $29.95
Your Price: $25.99

Though we have not used such a devise, there are/have been "prime pumps" available. The plumbing schematic starts with a hose/fitting in the bottom of the oil pan, to a pump, to a manual 3 way gate valve, to the "in" side of the oil filter.

One leg of the 3 way valve is connected to a hose for running used oil into a bucket. Otherwise, the pump is remotely controlled by a dash mounted switch and used to pressurize the oil system before cold starts.

I actually made my own hose and oil pan fitting kits. Never cared for the cheap quality/look of the kits hose/fitting connections. Some just look like they are ready to come apart. Don't recall if it was metric or not, been a couple yrs.

I have both the hose attached to my pan and a vacuum kit from West Marine - 8 quart, I believe. My SB 6.2 has a total capacity of 4.5 quarts. I suck out 4 quarts with the vacuum pump through the dipstick. I believe the other 1/2 quart is in the filter. It is easy to use.

I have the same hoses, same engines I just feed them into the bilge drain holes and let them drain for a few hours.

Having the drain hoses attached to the drain plugs works great. Saves alot of time & punch a hole in the filter to save on oil spill on the top since the filter is mounted upside down.