<chrisvillar@hotmail.com> wrote in message news:1115414280.421125.314990@z14g2000cwz.googlegroups.com...>I have a new to me '81 Mercruiser 228 5.0L. The dipstick tube has a> threaded fitting for a hose attachement that, I think, is there to suck> the oil out. I don't know if there is a plug on the oil pan or not.> I'd either have to remove my whole rear seat (possibly openning a huge> can of worms) or stand on my head in the engine compartment to find> out.>
I know that they make hand pumps to get the oil out but I want to do is> hook up a hose to the dip stick tube with the other end lower than the> engine (in a bucket on the ground). Instead of needing a pump or> sucking on the hose to get a siphon started, I was wondering if I might> be able to apply a VERY SMALL amount of air pressure to the crankcase> to get it started. I'd do this probably through the PCV fitting. When> I say VERY SMALL, I mean like 2 or 3 psi. Just enough to get the flow> started. I would increase the pressure in very small doses if 2 or 3> was too little. A dumbass would apply 40 psi and blow out a seal or> gasket. I may be dumb but not that dumb. Can anybody tell me if this> will work or if there are any problems with it?>
With my old new to me beater, I went to the trouble of finding the drain plug (picked up the appropriate Seloc manual first) . I found that I can fit a pan in there and drain the oil that way. I am more comfortable knowing that the oil ... and any crud left by the previous owner(s) ... was/is draining from the bottom of the pan rather than from who knows where using a pump. And ... by removing the seat and so on, I got a good look at the lower part of the engine ... oil cooler, hoses and so on ... to verify all was well. And if you trailer the boat or take it out of the water now and then, there is a replacement for the drain plug comprising a fitting and hose that lets you drain the oil through the hull drain plug.
I don't know if there is a plug on the oil pan or not.> I'd either have to remove my whole rear seat (possibly openning a huge> can of worms) or stand on my head in the engine compartment to find> out.
If you have a lot of patience the air pressure might get it out. I would try to figure a way the you can keep it hooked up from a while. Still does not seem to be worth the trouble just to avoid buying a 25$ hand oil pump.
I installed one of the drain hoses in place of the oil pan plug. I push it out the drain hole in the back of the boat and then just let it run out. But youy do need to be able to reach the bottom of the engine to do that and on some boats you can't.
<chrisvillar@hotmail.com> wrote in message news:1115558410.472780.69870@f14g2000cwb.googlegroups.com...> Even if the oil is hot? Most sources I've seen recommend changing the> boat oil when warm when doing through the dipstick tube. The reasons> are to ease flow and to get any particles and polutants in suspension.> If it won't siphon, I could keep the air pressure on the PVC port and> push it out. Right?>
On 6 May 2005 14:18:00 -0700, chrisvillar@hotmail.com wrote:
I have a new to me '81 Mercruiser 228 5.0L. The dipstick tube has a>threaded fitting for a hose attachement that, I think, is there to suck>the oil out. I don't know if there is a plug on the oil pan or not.>I'd either have to remove my whole rear seat (possibly openning a huge>can of worms) or stand on my head in the engine compartment to find>out.>
I know that they make hand pumps to get the oil out but I want to do is>hook up a hose to the dip stick tube with the other end lower than the>engine (in a bucket on the ground). Instead of needing a pump or>sucking on the hose to get a siphon started, I was wondering if I might>be able to apply a VERY SMALL amount of air pressure to the crankcase>to get it started. I'd do this probably through the PCV fitting. When>I say VERY SMALL, I mean like 2 or 3 psi. Just enough to get the flow>started. I would increase the pressure in very small doses if 2 or 3>was too little. A dumbass would apply 40 psi and blow out a seal or>gasket. I may be dumb but not that dumb. Can anybody tell me if this>will work or if there are any problems with it?>
Chris
I just did mine for the first time last week. I used a little cheapo pump that you hook to a drill. I think it cost $5 or so from Harbor Freight, but I just had it laying around in the garage. I had to add the hose and fittings which are just standard garden hose parts. Total outlay (including the original cost of the pump) might have reached $10 to $12. It only took a few minutes to pump out. I would simply buy a pump and do it as designed.
On 6 May 2005 14:18:00 -0700, chrisvillar@hotmail.com wrote:
I have a new to me '81 Mercruiser 228 5.0L. The dipstick tube has a>threaded fitting for a hose attachement that, I think, is there to suck>the oil out. I don't know if there is a plug on the oil pan or not.>I'd either have to remove my whole rear seat (possibly openning a huge>can of worms) or stand on my head in the engine compartment to find>out.>
I know that they make hand pumps to get the oil out but I want to do is>hook up a hose to the dip stick tube with the other end lower than the>engine (in a bucket on the ground). Instead of needing a pump or>sucking on the hose to get a siphon started, I was wondering if I might>be able to apply a VERY SMALL amount of air pressure to the crankcase>to get it started. I'd do this probably through the PCV fitting. When>I say VERY SMALL, I mean like 2 or 3 psi. Just enough to get the flow>started. I would increase the pressure in very small doses if 2 or 3>was too little. A dumbass would apply 40 psi and blow out a seal or>gasket. I may be dumb but not that dumb. Can anybody tell me if this>will work or if there are any problems with it?>
Chris
Drill a hole in the bottom of the boat, and make a little door. That way, you can easily change your oil.
On my boat, it is easy to get to the drain hole and the hose is clipped to the back of the engine area to make it easy to get to. I can reach my oil filter, but you could install a remote filter.
<chrisvillar@hotmail.com> wrote in message news:1117129515.600618.11080@o13g2000cwo.googlegroups.com...>I like the idea of the valve and hose, but I have two questions:>
1) How do you fish the hose through the drain plug?>
2) What do you do about the oil filter?>
I don't put that many hours on my boat a year so I just figured that I> could skip a year on oil changes. The process on my boat was easy> enough to go through once every two years.>
<chrisvillar@hotmail.com> wrote in message news:1117129515.600618.11080@o13g2000cwo.googlegroups.com...>I like the idea of the valve and hose, but I have two questions:>
1) How do you fish the hose through the drain plug?>
2) What do you do about the oil filter?>
I don't put that many hours on my boat a year so I just figured that I> could skip a year on oil changes. The process on my boat was easy> enough to go through once every two years.>
Chris>
Sorry I cannot answer your questions but just offering a word of advice: Even if you don't put that many hours on an engine you should still change the oil at least once/year, preferably just before winter layover.
<chrisvillar@hotmail.com> wrote in message news:1117129515.600618.11080@o13g2000cwo.googlegroups.com...> I like the idea of the valve and hose, but I have two questions:>
1) How do you fish the hose through the drain plug?
I use the clear 3/4" tubing. It fits perfectly thru the 1" drain holes. Yes, you still have to get into the engine compartment to feed it thru.
