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Old 05-25-2018, 05:47 PM
Procraft176 Procraft176 is offline
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Boat: Mastercraft, 1985, 351 windsor
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Dip stick reads way over full at 5 quarts

Manual says 4 quarts of oil +1 for oil filter for 351 Ford windsor. When I put that amount in my dipstick reads way over full. I know that I completely drained all of my oil. I blew some air into the oil fill to make sure. Not high pressure, just enough to put a little pressure to be sure nothing was stopped up in the drain Hose. I am not the first owner of the boat , so does it have the original dipstick... Can't be sure. My thinking is put 5 quarts in it and call it a day. What do you guys think? Didn't measure the amount of oil that came out, but it sure didn't look like 5 quarts. Thanks
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Old 05-25-2018, 06:03 PM
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Rico-X Rico-X is offline
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Boat: 1989 Prostar 190
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Maybe someone much more knowledgeable than I will chime in here, but I notice on my 89 Prostar, when changing the oil, when putting in 5 quarts, the dip stick shows the level to be overfilled. I believe this to be a result of the steep engine angle, since the rear of the engine sits way lower in relation to the front to accommodate proper angle to the driveshaft. I believe this to be normal
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Old 05-25-2018, 06:05 PM
Procraft176 Procraft176 is offline
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Probably right. Mine reads way over full. Maybe up to 2 inches or so above the full mark.
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Old 05-25-2018, 06:17 PM
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Rico-X Rico-X is offline
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Boat: 1989 Prostar 190
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That's how mine is. There are guys on here that know all about the old Prostars. I just acquired mine last fall, so I am far from a book of knowledge. Hopefully one of the 351 gurus will chime in.
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Old 05-25-2018, 06:47 PM
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AZDave AZDave is offline
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Boat: 1993 Stars & Stripes Prostar 190 351 285 hp
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Level boat, run it for a few minutes with a water supply, wait a while, then check level. Mine always took about 4 and 1/2 quarts. If it hasn't ran the filter will pick up a quart or so. If you did the oil change on a cold motor, there is always some residue that doesn't drain.
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Old 05-25-2018, 06:59 PM
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mikeg205 mikeg205 is offline
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Boat: 1995 Pro Star 205 5.7 Liter
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Check in the water.. after warm up to operating temp.

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Old 05-25-2018, 07:11 PM
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BrianS BrianS is online now
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Had the same issue with my '93 Prostar. Filled it to the line on the dipstick and I could hear the valves clicking. Put 5 qts in and it was way high on the stick but purred like a kitten. I just scratched a mark on the dipstick at the 5 qts line and called it good.


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Old 05-25-2018, 08:19 PM
Procraft176 Procraft176 is offline
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Boat: Mastercraft, 1985, 351 windsor
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That is what I'm going to do also, just wanted some good input from you guys.
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Old 05-25-2018, 09:37 PM
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Boat: 1992 PS 205-351w,285HO
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SKIDIM's maintenance page on their website states the oil capacity of the pan is 4QTs. They recommend you drain, change filter and add 4QTs. Then run in the water to fill the filter and check, adding enough to bring up to the "full" mark on the dipstick. Both my '89 and current '92 take 4Qts (or just a little over) to reach 'full'. Too much oil isn't good, too little isn't good either.
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Old 05-25-2018, 09:42 PM
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1redTA 1redTA is offline
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the filter takes a good bit of oil, check after running the engine
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