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How much oil?
- Thread starter MEDOO
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That sounds on the quick side.
Is the boat dual motors?
Are you premixing or running the oil injection.....if the injection, are the 2 grooves lined up correctly on the pump?
Is it smoking?
Is the boat dual motors?
Are you premixing or running the oil injection.....if the injection, are the 2 grooves lined up correctly on the pump?
Is it smoking?
OK, I don't know how it's to adjust in a boat but here is a pic of my oil pump w/787 in a ski.
I use Amsoil full synthetic Interceptor it smokes less. Some prefer to use the BRP full synthetic....which is a must for the 787 or 951 motors
****EDIT****
...can't seem to find the other ones showing the pump lined up correctly.
I use Amsoil full synthetic Interceptor it smokes less. Some prefer to use the BRP full synthetic....which is a must for the 787 or 951 motors
****EDIT****
...can't seem to find the other ones showing the pump lined up correctly.
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Sportster-2001-951C-Stock
Well-Known Member
As a rough approximation you should be consuming around 1 gal of oil for every 45-50 gal of fuel, the more throttle you apply, the fuel
il ratio drops, so more oil is used.
Your mileage will vary, make sure there are no oil leaks into the bilge as well, tanks and lines can lose oil around the fittings and the oil pump bracket also seals against the pump, apparently, so make sure your oil isn't in the bilge!
il ratio drops, so more oil is used.Your mileage will vary, make sure there are no oil leaks into the bilge as well, tanks and lines can lose oil around the fittings and the oil pump bracket also seals against the pump, apparently, so make sure your oil isn't in the bilge!
Dr Honda
Well-Known Member
That's not how it works. The internals are driven by a cam. So... once you come off peak... then it starts to lean out again. (not good at full RPM)
If you are happy with the idle speed... adjust them properly.
But... to your question......
It depends on how you drive. Those engine will go to 75:1 at idle. So... low speeds will burn less oil. Holding it wide open for a long time, with suck the oil down. Generally... a tank of oil will last 3 tanks of fuel.
MEDOO
New Member
Thanks I will check it out. If I remember the manual reading correctly, you adjust a cable to get them lined up.
We do a fair amount of cruising around at 5200rpm with an occasional wot spike in smooth water for 10-15 seconds. Just now getting the spin out down and perfecting it.
We do a fair amount of cruising around at 5200rpm with an occasional wot spike in smooth water for 10-15 seconds. Just now getting the spin out down and perfecting it.
Sportster-2001-951C-Stock
Well-Known Member
I'm wondering if you've actually tested to see how much is too much? I'm sure there must be some margin of safety built into the valve rotation?
Sportster-2001-951C-Stock
Well-Known Member
Thanks I will check it out. If I remember the manual reading correctly, you adjust a cable to get them lined up.
We do a fair amount of cruising around at 5200rpm with an occasional wot spike in smooth water for 10-15 seconds. Just now getting the spin out down and perfecting it.
Yes, some of the cables have a plastic nut jammed against a locking nut which is fairly east to reach, others have the traditional two nuts jammed on bothe sides of a bracket, I think.
The procedure is in the shop manuals.
MEDOO
New Member
This is looking about right for my oil usage. My oil is costing me about $48 a gallon out the door at the Seadoo dealer down the street, 2.3 gallon tank. So due to the oil, I'm adding about $30+ to the cost of a tank of gas. Gulp..
Sportster-2001-951C-Stock
Well-Known Member
Yeah, I stopped going out and just joy riding around in my boat about 20yrs ago, LOL, I started using my anchor every trip almost.
Dr Honda
Well-Known Member
If you buy a case of oil at a time... you should get a better price. If I by a case (3 gal) I can get the yellow bottle for about $32 each.
Regardless... that's the price you pay for feeding a 2 engine boat. Keep your cruise around 4500 RPM, and you will get your best mileage.
I guess that's one of the bonuses for the Merc engines. I get to use $19 gal TC-w3 oil. (and that's the synthetic stuff) AND... at full throttle... it's only 50:1. But the down side is.... I drink 27 gal/hr at WOT, and have a 55 gal tank. So... Yes... I can burn $200 worth of fuel in an afternoon.
I agree. With my above comment.... the 4 rs I was out yesterday... 3 hrs of that was with the anchor out, and the kids were swimming. (lol) But we still burnt 1/4 tank pulling the tube around.
Sportster-2001-951C-Stock
Well-Known Member
If your water is shallow and concerns over fouling running gear are high, then the jet has advantages. They will run in shallow water..."as long as the grass is wet" and you're easy on the throttle. Nail it hard enough out of the hole and you can suck a rock off a 6' bottom.
In my experience, although it generally requires more fuel to accomplish the same feat with a jet, slowing it down a bit and keeping the throttle balls out of the wall it gets more reasonable. I figure I save a good bit on fuel by cruising this boat at more moderate speeds, between 25~30mph on the lie-o-meter with this configuration seems to be in the sweet spot. That's about 5300RPM or so, much easier on the engine as well, I guess.
http://www.yachtingmagazine.com/sites/all/files/_images/201211/turning.jpg
In my experience, although it generally requires more fuel to accomplish the same feat with a jet, slowing it down a bit and keeping the throttle balls out of the wall it gets more reasonable. I figure I save a good bit on fuel by cruising this boat at more moderate speeds, between 25~30mph on the lie-o-meter with this configuration seems to be in the sweet spot. That's about 5300RPM or so, much easier on the engine as well, I guess.
http://www.yachtingmagazine.com/sites/all/files/_images/201211/turning.jpg
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MEDOO
New Member
As noted earlier I rarely go over 5000-5300rpm, even to plane out. I'm new to the jet drive, had i/o's for 30yrs. I'm spending as much as my friend with 24ft- merc 454/ bravo. I just had no idea... Guess I'll be tossing the anchor a bit more.
I've been looking for that $32 gallon case deal, so far can't seem to find it cheaper than the $45ish gal, case or singles gallons.
I've been looking for that $32 gallon case deal, so far can't seem to find it cheaper than the $45ish gal, case or singles gallons.
Sportster-2001-951C-Stock
Well-Known Member
I guess maybe you didn't realize how well off you were with the I/O's then. I have to chuckle a bit when someone complains about their stern drive around here, and rather enjoy pointing out reasons why they remain the prevalent choice. There are sand bars and shallow areas in various places around this lake, however, so having that drive hanging off the transom becomes a valid concern for consideration. This is the primary reason I chose to run jets here I guess, despite consuming additional fuel.
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