Stupid question...
 

Hey guys, sorry for the stupid question but when changing oil in your boat does the filler cap need to be on or off? We are using an electric drill powered pump and cant seem to get much of the oil pumped out. :confused:

I'm not sure I understood this but unless it's a trick question, it needs to be off...

I never really got much oil out buy using a pump through the dip stick hole. It's better to drain it out. But if you can't then be sure to run the boat first, so the oil will warm up and you can suck it up easier!!

Good Luck!

Thanks, its not a trick question. We have been trying it with the cap on and off and cant seem to grt much out. We ran the motor for 15 mins to get it warm.

Basically the drill pumps suck, oops-I mean they don't suck to well. You need to get one of the pro type pumps or a vacuum canister type if you are gonna do it through the dipstick hole. Or install drain hoses in the oil pan and drain them from the bottom.

That's what I tought: best drain it from the bottom, I never attempted to do it through the dipstick hole...

I have one of those quick drain hoses out the bottom of the oil pan, i stick the oil sucker down the hose, gets to the oil in the bottom of the pan. We use the big blue vacuum pump like bought a west marine.

I also have a hose running from my drain plug hole. I have the blue canister vacuum pump... works great as long as the oil is warm. Though lately, I seem to yank the motor out every time it's due for an oil change. :mad: :mad:

I've had really good luck with the electric pump
that clips to your battery. I goes thru the dipstick
tube. Just get your engine good & warm first.

Those take forever. Lot better off to get a turkey pan and drain from the bottom.

Yea if you can get in there. 32 Fountain,502's =
no room!

You are using the wrong type of pump. You need a TAT oil change pump. TAT is the manufacturers name. Warm the oil up, this supends all the particles, and the TAT pump will do it's job.
Good Luck
Ed

I like using the dipstick for oil changes. Works well for me.

Oil must be warm, else it won't cooperate..

Ever notice that Merc dipstick tubes have a weird washer thing on top of it? That's designed to screw a garden hose onto an use the ID of the dipstick tube to remove the bulk of the oil. Use the teeny anteater hose to suck out the last scraps if you want, but the bulk of it will come out from the tube itself..

I use the "hook up to the battery 3.5 gallon pump-it-out-the-dipstick" contraption.:rolleyes: Works great!!
How much faster does it do it with the big hose? With 12 qt. pans, it's not just one beer per engine!!:D :D

I use a hand pump with warm oil.

Just for laughs once i took a heavy duty trash bag put it under the plug and drained the rest of the pan out after the hand pump . I got at most about 1/4 of a Quart out

you should have put your mouth on it Disneyland

i use the Tempo vac pump canister type and it works well with warm or cold oil. came with fittings for the merc style dipstick tube that mcollinstn mentioned above and also a skinny tube you can snake down there. i have quick drain hoses on both pans and i still use the dip stick method instead. the Tempo one is the best one i have used so far but also the most expensive. its like $65.00 and it took a while for me to plunk down the $$$ for one but in the end it was worth it.