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    1989 5.7L 4brl won't idle below 900 - 1000 rpms

    Marine carburetors don't have a fast idle cam/setting. That is for automotive only OPs issue at first sounds like a vacuum leak however their mention of being apprehensive about properly adjusting the carburetor leads me to agree w/scott and perform some preliminary adjustments before...
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    No power to my radio, cabin lights or refridgerator

    This describes a converter, not an inverter An inverter changes (inverts a direct current sine wave) 12 volts dc to 110 volts ac
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    No power to my radio, cabin lights or refridgerator

    With two batteries I'm gonna guess you don't have an inverter. I think you may be mistaking an isolator for an inverter If you have an on-board battery charger, some times known as a converter it most likely is connected to the ac/shore power panel. The converter takes alternating current from...
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    No power to my radio, cabin lights or refridgerator

    How many batteries are in the entire system?
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    replace or rebuild merc carbs

    How is it acting up? Mercury sells rebuild kits for carbs reasonably priced and excellent quality
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    Where are the rear motor mounts on a mercruiser 120?

    You're thinking automotive Older marine engines don't use vacuum aside from a possible vacuum monitor guage on the dash No emissions control, no vacuum advance
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    2013 Volvo Penta 4.3GL Oil Pressure Drop & Valve Tapping / Rattle

    Not a common issue with a 4.3, they are sound, proven marine engines with a solid track record of reliability Issues sounds like oil starvation to the top end with the valve train chatter along with lower pressure guage readings. WAG at this point is oil overfull and frothing under a load or a...
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    Engine Alignment tool goes in about 1/4 of the way, question.

    There it is A loose coupler no question has wear. Sitting 12 years won't cause a coupler to loosen on its own Probably run for how long with the issue? Can't say for sure but will say you should have at least replaced the coupler when the engine was out Cheap easy route is to clean as much of...
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    Engine Alignment tool goes in about 1/4 of the way, question.

    Splines are full of old, dried grease and aluminum from the coupler Guessing it's been a long time since the drive was pulled for routine maintenance and most likely the coupler is severely worn If you can, post a picture of the coupler. Splines should be squared off on the tops/ridges. If...
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    Engine Alignment tool goes in about 1/4 of the way, question.

    If the drive is hard to remove either the engine is out of alignment or the coupler hasn't been greased for a long time Either way that means most likely a worn coupler Got any pictures of the driveshaft splines and coupler?
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    Engine Alignment tool goes in about 1/4 of the way, question.

    How far did the witness marks show the alignment bar entered the coupler? Yes, the gimbal bearing could be out of alignment. The motor could also need alignment If the coupler is worn, i.e. slpines are knifed then even a properly aligned gimbal bearing/engine will have a difficult time seating...
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    350 Mag Mpi hard to start when warm or hot

    A faulty map sensor will cause over fueling especially if the signal to ecm is the same reading as baro pressure. Ecm will think throttle is wide open at all times
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    Volvo Penta 5.0 GXI-E - Won't roll over

    You should pull the drive for a pressure test when you note water in the gear oil. Gives a comprehensive look at all the seals. If the u joint bellows has failed water can enter the drive quite easily, among damage to other components FYI the spark plugs pictured were installed at the factory...
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    Over heating 1988 mercruiser 185 4.3

    With the check balls in place it may be the springs have lost tension and allowing the balls to not seat properly. Another problem may be the balls are worn to the point they no longer seat properly If you remove the assy you can stretch the springs and turn the balls around so the normal...
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    Volvo Penta 5.7 OSi/XDP Forward / Reverse Problem

    Yes, the plastic volvo drive. No longer supported by the manufacturer Contact a local volvo penta dealer. They can help you. Vovlos only repair is to abate the xdp drive and transom assy and install an sx-a drive/transom assy Hopefully vovlo will suppy parts at no cost, may have to foot the...
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    2010 4.3L TKS Thunderbolt Ignition Troubleshooting

    Dang, I want it too
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    Exhaust bellows ripped

    Tube is designed for a bravo model. Specifically a sbc with bravo 3. If you install a tube instead of bellows your exhaust will be noticeably louder at idle/low rpm and will soot your transom
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    Over heating 1988 mercruiser 185 4.3

    Based on pictures and your confirmation of the cooling system there should be no check balls in the t fitting supplying water to the exhaust risers/elbows. Your description of the overheat sounds exactly like a cooling system with the check balls. Only way to know is remove the hoses at the t...
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    Volvo Penta 5.0 Gi Beeping every 3 seconds

    Gonna guess your boat is glastron/larson. Most likely genmar The guage cluster/instrumentation is specific. VDO quit supporting those clusters over 15 years ago As far as alarms go you need esoteric troubleshooting, far beyond explanation here. You need expert eyes on your setup
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    Heat Exchanger blocked: recommendations how to flush or unclog?

    Alpha one/mr/r/mc-1 (all) use the same impeller/sea water pump housing Only caveat being is w/p base/seal assy. If you'd like to get more esoteric I'm free to chat As Scott06 mentions, the colloquially known 470 was produced until the 1989 season which includes a vast number of alpha ones...
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