newbie again -- how do you change the oil in boats

[alilley]

Re: newbie again -- how do you change the oil in boats

bigdan this boat is prehistoric after all it is a 1988. i probally would put a valve with a hose on it next tine i change it which will be when i winterize it. i had very minumal mess and nothing that the simple green didnt take care of.

 

[fishrdan]

Re: newbie again -- how do you change the oil in boats

+3 on the double trash bags,,, but you guys forgot about the bungee cords

 

[Lou C]

Re: newbie again -- how do you change the oil in boats

Really guys the fitting for the dipstick tube on most engines is either close to or right at the bottom of the pan...if you use the garden hose adapter on the vaccum pump, it is going to get nearly all of it out...no chance of making a huge mess in the bilge...On the OMC 4.3 dipstick tube enters the oil pan right near the very bottom side of it....the one for the 5.7 actually is even lower, entering the pan on the underside of it. You can tell when you've gotten just about all of it out when the vac pump starts sucking air.

Using the garden hose adapter on the vac pump enables me to do a mid season oil change with the boat in the water (don't need to do the filter then) in about 10 min, no mess....if you make a mess in the bilge...and get water in there...and it gets pumped out and makes a sheen on the water...fine from the Coast Guard at least around here...

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[alilley]

Re: newbie again -- how do you change the oil in boats

Using the garden hose adapter on the vac pump enables me to do a mid season oil change with the boat in the water (don't need to do the filter then) ....


i am just wondering what you lodgic is on changing the oil that much. honestly i think if you are just trying to make sure that it is clean and taking care of the motor yo uhave it back words. now before this turns into a long thred about oil again give me a sec to explain where i am coming from.

i drive a truck. yes the motors in these things do hold a lot of oil (usually 10 gal) but the minumal milage recomdation for changing the oil is 20,000 miles on standard oiland 100,000 on synethic. now there are some people that do a lot more then that as well. you could use the arguement that marine engiens are in a drifferant envirment, but really they are not. a truck engine is sprayed with water any time it rains, and pulling 80,000 lbs down the road has to be a lot more work then pushing a boat ans skier across water. nowe with that being said oil does not wear out, it just get dirty, or it breaks down. if you are changing it due to the later then you are having mechanical issues. and thoes need to be addressed more then the oil does. now with all that being said wehre i get my info from is there are at least 3 companies that i can think of that offer a bypass filter system for trucks. what they do is take a little bit of oil, run it through a super filter and through a refinery that pulls out the water and puts clean oils back into the system. now with these systems, they take an oils sample ans send it into a lab (only cost like 20$) and they test it to see what metals and what is not to be in it and let you know when to change the oil, some people are getting over 350,000 miles on synethic oil with out changing. if you want to continue changing out your oil like that go a head but if i were to worrie about having clean oil in my motor like that all the time then i would just change the filter and save a lot of time and money

 

[TooBizzy]

Re: newbie again -- how do you change the oil in boats

I have the Pela Pro 14K 14.8 qt oil extractor. No need to adapt to the threads of the dipstick tube. I use the 3/8 o.d. supplied line with the pump and attach it to the dipstick tube with a 3/8 i.d. rubber hose. It will suck 5 qts of oil out in about 5 minutes or less. No mess. No fuss... Can't believe how I rastled with oil changes before I got this pump....

http://www.pelaproducts.com/description.htm

 

[Lou C]

Re: newbie again -- how do you change the oil in boats

Well the logic is that a marine inboard is an ADAPTED car engine, it's being used in an environment that it was not really designed for. In other words your I/O raw water cooled especially runs cooler than that engine was designed to (marine=160 car=195 thermostat rating). Then there is the richer fuel mixture calibration needed to prevent detonation because they are under constant load. No multi-speed transmission, one gear ratio only. Cruise RPMs are up at 3500 most of the time. IF you take the colder running, rich fuel mix and less than perfect mixture control if carbed, what do you get? The oil can get some level of fuel dilution and moisture accumulation, both are not good for lubrication. Then if you are not useing an oil well suited for marine use (either the Merc 25/40 or a straight 30 or 40 depending on temps) you can very easily get viscosity breakdown. So doing an extra oil change certainly can help....depending on total hrs per season and use...