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    95 4.3LX Electric Fuel Pump - How often should it be running

    From what I've read in the service manuals, the pump gets 12V when the engine is cranking, and then via a fuel cut off oil pressure switch when the engine is running. I have two questions. First, is the pump supposed to run continuously while the engine is running assuming there is oil...
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    4.3LX Bogging down above 2300RPM after an hour or two of use

    Can anyone comment on why my motor would only start bogging down after an hour or two of skiing and tubing? It always starts easy, runs smooth, has great take off, but after about 1 to 2 hours of usage on the lake, I'll notice it suddenly takes longer to get on plane, and then it will surge...
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    4.3LX Bogging down above 2300RPM after an hour or two of use

    First season out on a 1995 4.3LX alpha one. Been running great. Last couple times on the water, after an hour or two of skiing and tubing, I will notice that the time to get on plane takes a little longer, and then soon after getting on plane takes longer, it will start bogging at WOT or...
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    1995 4.3 LX Overheat - or not

    I need info about actual temperatures I should see with my IR thermometer with my 4.3LX 1995 motor. - I tried reading lots of posts about overheating but didn't come across actual temperatures being mentioned around certain parts of the motor. After running 15 minutes on muffs- I measure...
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    1995 4.3LX TStat question

    I have a 1995 4.3LX alpha one with a seawater cooling system (not closed system). Couple questions. If I want to remove the Tstat and do a test in a pot of water- do I really have to completely drain all the water out of the engine like my Clymer manual is telling me- it's also telling me...
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    1995 Alpha One Steering play- not gimble ring clamping bolts

    I had steering play in my stern drive. After tightening the gimble ring clamping bolts to 55 ft pounds, almost all of the play is gone. Before I could see the gimble ring moving on the square insert. Now that both are tightened, the square insert and ring move as one and are nice and...
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    Should there be any left to right play in stern drive gimble mount

    I may not be using the right terminology here, but if I grab my stern drive I can move it left to right about an inch without the steering wheel moving. Should there be this much left and right play in the gimble/swivel mount of the stern drive or should the steering linkage be stiff and not...
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    1995 Alpha One a lot of Oil on Drive Shaft when I removed lower unit

    Took off my lower unit to replace the impeller and do water pump service, and when I separated the lower unit, there was quite a bit of gear oil on the drive shaft in/around the spine where the drive shaft inserts into. Easily a couple tablespoons maybe more. It dripped out when I separated...
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    Mercruiser 4.3LX Alpha One Gen 2- Where to aim temperature probe for best reading

    If I'm not sure my dashboard temp guage is accurate and I have an IR thermometer... where are the best places to aim my IR thermometer on the engine to get a good reading of the engine's temperature?
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    Transom Relief holes / water outlet exhaust question for Alpha One Gen II stern drive

    Dumb question I suppose. This is my first alpha one genII - on a 1996 4.3LX. My previous boat had an old 2 stroke outboard and I was used to all the water and exhaust going through the prop. Can someone explain the normal path for water and exhaust on an Alpha One Gen 2 stern drive-...
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    Muff Testing for any cylinder water intrusion

    This is more of a question of whether muff testing will verify if you have a water intrusion problem than necessarily telling you what kind of water intrusion you have. But after I've inspected risers, manifolds etc etc- and I want to be confident I don't still have water coming in anywhere...
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    1996 Maxum 1800 SR Mercruiser 4.3LX Alpha one engine hour meter question

    Just bought this boat. I can't find an hour meter anywhere on the dash. No missing guages are evident. All analog. RPM, MPH, Temp, Oil Pressure, Trim, Fuel are all around the steering wheel, but no hour meter. Is there a place on the engine itself where an hour meter is- or was it not...
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    1996 4.3LX alpha riser/manifold question

    I bought a boat with not much known about it's history. Previous owner winterized the boat (verified in the fall by me) and he abandoned the boat with a sheered starter motor boat. No other history is known. I left it in dry dock until now. I didn't try to repair the starter and turn over...
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    Matching Thrust Bushing for 68-72 V4 Electric Shift lower

    I like to keep a spare lower unit handy for my 1972 Johnson V4 100 100ESL72R motor. That way if it leaks or fails, I can swap lowers and worry about fixing the bad one later. I bought a good looking spare unit on ebay. Problem is it doesn't have a thrust bushing. This gear case is slightly...
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    72 electric shift leaking through solenoid cover

    Looking for a recommendation on some really good gasket sealer that will adhere between rubber and metal. I Noticed water was getting into my lower unit gear oil and I'd see the tinest trails of gear oil leaking when I was parked at the marina. I dropped the lower unit, and pressured up...
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    72 Electric Shift Lower Shaft turns both ways

    I'm planning on swapping my lower unit on my 1972 johnson 100HP V4 electric shift. I obtained a spare lower unit on ebay. I pressure tested it, and the solenoids ohm out okay, oil looked clear, no metal in it. However... before I swap lower units and put the boat back in the water, I...
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    Faria Tigershark Tach Wiring Question

    Looking for wiring advice on an old Tigershark 6 pole tachometer from Faria. I bought an old 6 pole Faria "tigershark" tachometer for my 72 100HP V4 Johnson 2-stroke. It's new but it was an open box deal with no docs. It has 3 input lead wires coming out of the tach- yellow, purple and...
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    Looking for Sierra cross reference for 1968-1972 V4 100HP water tube guides

    Looking for obsolete parts.. I have a 72 Johnson V4 100ESL72R - my water tube guides are pretty chewed up and they are difficult to work with. Over the years I've had to trim them shorter to get rid of the chewed up part. I always have difficulty lining them up when bolting up the lower...
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    Need Water Pump Kit and guide tubes 72ESL100R 1972 V4 100

    Iboats doesn't seem to list sierra water pump kits for years prior to 74. I have a 1972 electric shift V4 100HP. I've come across a spare lower unit, but it doesn't have the water pump kit- specifically the housing, plate etc. I know where to get impellers, but the full kit that would...
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    Tachometer for 1972 Johnson V4 CDI

    I've been told I need a 6 pulse Tachometer for my 1972 ESL72R Johnson 100HP V4 motor. It has the older capacitance discharge amplifier system where the charging system/alternator is separate from the ignition system. I currently have a Tachometer - 1970's era but the back of it has the...
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