hi-performance 320 EFI
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hi-performance 320 EFI
hello new boat owner
Bought a liberator 211 with a merc 320 efi whit alpha drive . and last summer i only got 4200 rpm at wot. have 14.5X21 steel prop. Read that they should rev about 5000-5400 Wot. someone who has experience with this engine, and what can cause these kinds of problems?
Bought a liberator 211 with a merc 320 efi whit alpha drive . and last summer i only got 4200 rpm at wot. have 14.5X21 steel prop. Read that they should rev about 5000-5400 Wot. someone who has experience with this engine, and what can cause these kinds of problems?
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hello new boat owner
Bought a liberator 211 with a merc 320 efi whit alpha drive . and last summer i only got 4200 rpm at wot. have 14.5X21 steel prop. Read that they should rev about 5000-5400 Wot. someone who has experience with this engine, and what can cause these kinds of problems?
Bought a liberator 211 with a merc 320 efi whit alpha drive . and last summer i only got 4200 rpm at wot. have 14.5X21 steel prop. Read that they should rev about 5000-5400 Wot. someone who has experience with this engine, and what can cause these kinds of problems?
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Are you having any problems other than low rpm? Liberators are pretty heavy boats if I remember right, If no problems I would try a 17-19 pitch prop. a 19 should put you around 4600 a 17 should put you right around 5000 rpms. Just a thought, Randy
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A 211 should be able to pull a 21 no problem, if it's a known good prop. Do you know the prop is good? My 87' 211 would turn a 21" prop to about 4600, and a 19" close to 5k, which was to high for my motor. This was all with the 350/260 about, 52-53mph. What is the ratio of that drive? That's a great motor and should put you on par with the 454/330.
211's Love the 21" ballistic prop.
211's Love the 21" ballistic prop.
Last edited by BBCLiberator; 03-25-2013 at 09:47 AM.
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A 211 should be able to pull a 21 no problem, if it's a known good prop. Do you know the prop is good? My 87' 211 would turn a 21" prop to about 4600, and a 19" close to 5k, which was to high for my motor. This was all with the 350/260 about, 52-53mph. What is the ratio of that drive? That's a great motor and should put you on par with the 454/330.
211's Love the 21" ballistic prop.
211's Love the 21" ballistic prop.
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I had an '86 272 LS Formula with twin 320 EFI's on Alpha SS drives...1.5 ratio. With 23" Cleavers RPM was in the 5800~6000 range!!! One of the fastest boats i ever had. I ran the bejeezus out of those motors and sold the boat with 300 + hours on it. It ran 75 the day I sold it....wish I still had it.
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I had an '86 272 LS Formula with twin 320 EFI's on Alpha SS drives...1.5 ratio. With 23" Cleavers RPM was in the 5800~6000 range!!! One of the fastest boats i ever had. I ran the bejeezus out of those motors and sold the boat with 300 + hours on it. It ran 75 the day I sold it....wish I still had it.
Last edited by BBCLiberator; 03-25-2013 at 01:58 PM.
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It very well may be a tired old girl.