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    Low fuel pressure, fuel filter half full while idling.

    Best method of repairing the cool fuel module in question is removing it from the engine assembly and placing it on the bench In order to remove the cool fuel assy the motor mount needs to be loosened/removed. To riase the engine on one side I use a bottle jack on the exhaust manifold and wood...
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    '09 Merc 5.0L Carb / Alpha 1 - Engine runs and will not respond to ignition or kill switch when at temperature?

    Sounds like a short in the tks/fuel pump bypass circuit Has the engine ever overheated? Would look for melted/burnt wiring/harness connections along the tks, fuel pump and ignition circuits
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    Alpha 1 gen 1 water pump

    If it's your neighbor let him get whatever parts they want If it's a customer, your asking this forum as to sourcing/selecting the correct parts for this routine maintenance job is interesting
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    Alpha 1 gen 1 water pump

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    Alpha 1 gen 1 water pump

    This post reads to me as you are a mechanic for hire. If so, asking about sourcing/selecting the correct parts for this routine maintenance job on this forum is interesting. Good luck
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    Wrong Manual

    Yes. Mercruiser started thunderbolt styled electronic ignition on inboards around 1983. It quickly migrated to MCM (sterndrive) and was ubiquitous through the mid 1980s through the 1990s and beyond. Still seen today on older packages parts are readily available (save for new oem ignition...
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    trouble getting reverse.

    If I understand correctly by given info you're asking about the shift foot to lower shift shaft splined connection. If so, there's a washer that rest on the lower shift shaft bushing that the shift foot (brass) fitting rests on. This prevents the shift foot from degrading the shaft seal...
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    Help identifying which 454/ 7.4L engine this is?

    Agree w/t. Gen 5-6. I'd be more inclined to gen 5 given carbureted. Mercs mpi 7.4/454 engines used the final designed gen 6 for most if not all of the production run. I've asked here about the history of the 454 due to its outstanding design and performance in a marine engine application but...
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    trouble getting reverse.

    What is make/model of equipment you're referring to? Would guess MC-1/R/MR/Alpha One based on provided info. But that's a guess.
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    Dam it! Wont Idle

    You can certainly do this but it probably won't solve the issue. Most likely you need to clean/rebuild the carburetor. A factory service manual can explain quite detailed how the carburetor works including rebuilding. If you google marine rochester two barrel/mercarb that ought to give you some...
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    1989 Mercruser 5.7 will not get over 2000 rpm

    1989 mercruiser 5.7. Yes that is some info but there is more info you can provide. Best info is serial numbers and actual model ID. Model will be something like MCM 5.7 Liter. Nobody here knows exactly what setup you have. Is it oem/stock? Pictures help a lot if you can't get s/n or model info...
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    Mercruiser outdrive gasket

    It happens occasionally, that portion of the gasket isn't very wide as there is little surface area for it to cover. Best suggestion is to throughly clean the entire gasket surface on both the drive and bell housing. Just a tiny piece of debris/flaw can cause your issue. I've seen this most...
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    Fluctuating temperature?

    With any raw water/open cooled mercruiser cooling system issue the first item to inspect is the sea water pump/impeller and associated hoses/passages for blockage
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    Alpha 1 gen 1 water pump

    Mercury doesn't sell MC-1/R/MR/Alpha one water pump kits with a base because the housing can mount to two different bases. Bases are sold separately depending on gearcase vintage/style Can't say as to the sierra numbers, I've never used them as they don't even come close to the quality as oem...
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    Baretta

    Being a 1979 model boat it certainly has start in gear protection, colloquially known as a neutral safety switch. Most commonly located in the remote control (throttle/shift assembly at the helm) There's a good explanation of a typical sterndrive engine starting system in the DIY sticky at the...
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    Raw water pump

    This kit you reference is not the style water pump OP is referring to
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    Raw water pump

    Not sure what kit you're referring to but ime there are two sizes of impeller. A white hub impeller is a standard/original style size impeller with no wear plate in the housing, red hub impeller is .030" shorter and requires a wear plate in the housing The housing cover is either solid brass or...
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    Grooves worn in driveshaft

    There's not much room, if any at all for those seals to be set in a different location. Use the install tool and they seat in place against the shouldered area in the housing MC-1, R/MR/Alpha 1 is easy to replace the lower seal. Upper seal requires removal of the driveshaft meaning disassembly...
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    Alpha 1 Gen 1 - Teardown - Need Advice

    Those seals aren't even close to being okay. I wouldn't trust them for a minute of use let alone a full season. Based on the picture I'd guess both drives are in need of complete reseals Did you pressure test the drives before filling with lube? Don S. had a signature that said, "Why is there...
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    1987 CHRIS CRAFT AMEROSPORT 284

    Agree with the afore mentioned tests by others regarding the fuel sender/guage system. You test the sender, wiring and guage output. Most often the culprit of a faulty fuel gauge reading is the sender, however it could be wiring or the guage itself I would add a cap/rotor and points set (if...
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