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    Difference between AQ271 and AQ311

    Both are GM 350's except the 271 makes 275 hp @ 4600 rpm and 311 makes 307 hp @ 5200 rpms. Whats the difference that makes more power? Is it the higher redline for the 311? is it built and carbed any differently?
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    Keeping the boat in the water even with below frezzing nights

    Up here in Northern Ontario Canada the boating season is short as is. What do people do when they want to keep their boats in the water longer. Will a car heater in the bilge (with ventilation) be good enough to keep the engine/manifolds and power steering from cracking? Or is it possible to...
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    Normal Oil Pressure Range

    Hi all just wondering what the normal oil pressure range is cold/hot and idle/cruise on my style engine... Mine shows about 70-75 in cruise and 45 idle and hot.
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    Boat hit rocks..

    I'm asking for a friend. The other day they hit a rock and had to get towed back to town. The motor starts and runs but won't shift into gear. It's a late 80's Mcm 140 with alpha one drive. The lower unit skeg n prop is a lil mangled but the housing didnt split. Any ideas why it wont go into...
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    Any benefit of Full Synthetic or Conventional/Synthetic Blend Oils?

    Any benefit in my 1989 motor/drive with 200hrs? Or should I just stick to regular "dinosaur" oils?
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    Question about Distributor Points

    Im replacing the points in my distributor. The shop manual says the gap should be 0.014-0.019". Why such a wide range? Also, how do you adjust dwell on a presolite dist? Theres no window on it to adjust it like gm distributors while the engine is running. Do you have to play around with the...
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    Trim position gauge

    Whats usually causes the trim position gauge to read incorrectly? Mine worked for most of the summer then started to ready incorrectly and now is way off. Showing trailering position with the drive all the way down...
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    Volvo penta prop/ rpm question

    Hi all looking for a some referance concerning the output of my motor/prop combo. I have a 22.5 ft Baretta with a Volvo penta 305 CI/5.0 L motor that puts out 230 HP. Volvo suggests a 14x21 or 14x23 ( in 14" diameter) prop. Recommended RPM range at WOT is between 4000-4400. I have a VP OEM...
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    Aq231A Won't Start

    Hi All I need some guidelines. My AQ231A Ran fine but now all of a sudden wont start. The starter itself doesnt do anything when you turn the key. Everything else works when ignition is on including the trim pump. I'm hoping its something simple. Any suggestions? Thanks
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    Noise when spinning prop by hand

    When I spin the prop in neutral counterclockwise by hand it makes a low pitched clicking noise. However when I spin it clockwise it sounds fine. Hoping its not the gearset/bearings going in the lower. Could it be the shift cable needs adjustment?
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    U-Joint Bellow

    Should I apply a sealant or grease to both ends of the bellows before tightening to clamps?
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    Water Temp Guage Inop

    Is there a way to test whether its the gauge or sender on the manifold? What typically goes first on the AQ231A?
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    Installing motor

    Got new structural motor mounts made up for the boat. Whats the process of installing the engine? It's separated at the flywheel housing. Ho do I measure everything up if that has to be done. Thanks
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    Engine Mount Lag bolt Question

    Hi, In the process of having my motor mounts replaced since they were soft. Wondering how I should drill and install new lag bolts. Also should I use 3/8 or 1/2? Should I soak the new holes with epoxy or is 3m 4200 sufficient?
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    What to look for when inspecting manifolds/ risers?

    Pulled my engine and wondering what to look for to decide whether to reuse/replace my exhaust manifolds?
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    Riser Gaskets

    Im installing new exhaust riser gaskets. I recall seeing a service bulletin to add a sealant along with the new gaskets. I'm wondering if this applies to my engine model/year.
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    Sealant and grease queation

    Can I use permatex aviation sealant on the upper/intermediate/lower unit mating surfaces? Is there a general purpose grease to use on the outdrive/pds bearings? Thanks
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    AQ231A Flywheel

    Wondering if this engine had the 13" or 14" Flywheel. If it is the 14" flywheel then I have a single bearing flywheel housing. Is this correct?
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    Whats easier to work on?

    Generally Speaking... Whats easier to work on? A Volvo 280/290/SP/DP drive or a similar era Mercruiser Alpha/Bravo?
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    Pulling an Engine

    How hard is it to pull the engine in the boat in my signature? Thanks
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