oil change

[scottwvyc]

I would like to change the oil on my new boat,1980 37 c 671 n's. No oil change system. I will prefill the new filters, any other advise. What is the best way to get the old oil out? How much do I tighten the new filters? Anything else would be helpful.

 

[eze2bme]

Go to West Marine, Boaters World or similar boat supply store and purchase the Jabsco Porta Quick 12v oil changer ($175 @ West Marine). This is a portable system with the pump mounted atop a 14 quart container. You simply attach the alligator clips to the battery, slip the pickup hose down the oil dipstick tube and pump away. Keep in mind that the 671N's hold 6.5 gallons each and it'll take a while to empty with the small diameter pickup hose. Make sure to start the engines and get the oil warm before pumping.

I use a heavy duty plastic bag over the filters to prevent getting oil into the bilge. Fill the filters with oil, lube the rubber O-ring and spin back on 'til snug. Then approximately an additional half turn. Run the engines and keep a check on the filters as sometimes the rubber O-rings heat up, get soft and need an additional tightning.

I have a permanent oil change system and if you have the opportunity I would strongly suggest installing one. You can get the Groco MX Series Oil Changer Kit from West marine for $475 not including hookup hoses or electrical wiring. This is a permanent install and has a three valve manifold for mains and genny. Since it uses 1/2 inch hose it empties the engines MUCH quicker! Another nice feature is that the pump is reversable. I made up a 1/2 inch PVC adaptor that is long enough to reach the bottom of one gallon oil jugs and use that to pump the new oil into the engines. Again ... much faster than pouring into the oil filler. I picked up used 5 gallon peanut oil containers from a local restaurant and pump the used oil into them.

Good luck ... have fun ... and turn the AC on to keep things cool!

 

[ADaily3224]

As long as you're pulling the engine oil out; while the sump is dry you may want to install drain hoses into the drain plug receptacle. Oil changes will go much faster and neater. The parts won't cost any more than $20.00 It's the first thing I do to any boat I buy. There's very little pressure in the sump, you need a couple lengths of hose, barbed fittings, and a couple of shut off valves. Nothing to it.

A. Daily

 

[Genesis]

You can put hoses and nippes on the drain and cap them even without a pump permanently installed - just make sure they're clamped well and WELL ABOVE the level of the oil pan.

Better is a pump - get some valves and make up your own system. MUCH cheaper than the prebuilts, and works just as well.

That's what I did with mine.... and while you have the oil out, its the perfect time to take care of this.

BTW you want to use straight 40wt oil in those 6-71s, and make SURE its rated "CD-II" or later (e.g. "CF-II or CF-2") DO NOT use an oil lacking this rating. Delo 400, for example, is NOT acceptable. Exxon XD-40 is, along with Delo 100.

 

[Nick]

I purchased a portable 110v gear oil pump from Grainger and had the hoses and fittings made up with Aeroquip components by the local distributor. I picked up the pump last year for about $200. It drains the oil in minutes and refills just as quickly from 5 gallon pails. I also 37 and did not install a permanent pump because of space considerations. I connect the pump when needed to fixed hose drains installed on each engine. The fixed hoses are capped with brass plugs at a height above the oil level in the engine sump as stated above.

I'll get you the pump model number if you email me a note.

Nick