So I've always used a mechanical pump through the dip stick tube to change the oil. For some reason i can't get anything on this 350. I'm thinking about getting an electric one but wanna run it by the SoCaljetboat team of experts first for any advice.

I use one of these vacuum style oil change kit. It takes a while cause I can't warm the oil first. Pump the vacuum to 10 psi and let it sit. Removes 9 1/2 of the 10 quarts.

Where would one get that style pump?

Thanks 74.