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    Volvo AQ131a/175 questions...

    After digesting the responses to my Merc vs Volvo query, I bought a 1986 boat with an AQ131a/175 drive train. Low hours, I think, and good compression. It has several issues: (1) Alternator is out of alignment. Is this common? (2) Push rod setup that unlatches the tilt lock isn't working...
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    best outdrive choice?

    I'm planning a project boat using a 4 cylinder outdrive in the range of 120 hp. It will be a salvaged unit from late 70s/early 80s (most likely). I see my choices as being between the MerCruisers with Chevy 2.5 or 3.0 L engines or Volvo-pentas--probably a SOHC. The Mercs are clearly the...
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    MerCruiser (I/O) cooling system plugs with sand

    In going through this for the first time I found the water inlet hose packed with sand. It could not possibly have been getting much if any cooling. On our first outing we got into a shallow silty area and again I found lots of sand in the cooling system. There is no strainer on the intake...
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    Mercruiser harness connector problems (1972).

    I'm having intermittent electrical blackouts that I think can only be the main engine-harness to boat-harness connector. There's not much else and I've checked it all. This seems to be a split-pin and sleeve connector and I should be able to tighten it by spreading the pins a little. But I...
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    OMC 2.3 in '87 Larson 16.5

    I've developed a small interest in this boat, in spite of the funny/ugly bulges on the transom. Can anyone give me any general feedback on what to look for and what to expect? I see that the OMC cobra stern drive is generally not well thought of on this board. What are the particular...
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    gas tank fill hose?

    I'm working on a 15.5 ft Lund (Shell Lake) trihull. 1972. The fill hose was radiator hose when I got it. The fill hose I bought is very stiff stuff with wire in it. I don't think it's flexible enough to go in, and if I force it I'll worry about the strain on the (tin) tank. Seems to me the...
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    Setting timing on Mercruiser 90 hp (Renault)?

    Anybody know how this is supposed to be done? There aren't any belts or pulleys to turn the engine with, and the window in the bell housing is in a pretty inconvenient spot....
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    setting timing on Mercruiser 90 (Renault)?

    This is almost ready to run, but I'm not sure how to set the ignition timing. Can see some marks on the flywheel/rotor through an opening in the housing. But the Manual (#1) is not very clear on what should line up with what. Which mark? Where with respect to the opening? Is anybody...
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    Tilt pump motor seal?

    I'm going through this pump, which is on a 90 hp Merc outdrive (Mods: This is NOT an outboard motor) and should be part number 45060A7. It's a Prestolite (I think) motor. I found the motor really gunked up, like a starter off a motor with a leaking rear main seal. There seems to be a little...
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    1972 Merc 90 carb?

    I don't seen any external problems with the carb but haven't opened it up. But judging from the plugs it's been running rich. Am wondering if this is likely to have a metal or plastic foam float. Anybody know? Any differences from the usual automotive item? My experience with plastic floats...
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    1972 15 ft Lund IO no fuses

    I'm going through this sorting out the wiring. Like many old boats the wiring is a nasty rats nest but it is a simple boat with few electrical items and not hard to sort. But there is not a fuse on this boat. the Outdrive (Merc 90 Renault) hasn't a fuse or breaker anywhere that I can see...
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    Mercruiser 90 control box?

    I'm going through a Merc 90 (Renault) on a 15 ft Lund trihull. The trim motor won't run even if jumpered directly, so I'm getting ready to pull the pump/motor assy. There is also a "tilt switch" shown in the schematics and what seem like the leads to it. But where, actually, IS this switch...
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