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    Question on removed Oil Pump

    I have a 40 HP Mercury 1996, the oil pump has been removed and I am using premix gas. I recently went over the powerhead, now putting back together, am I correct to assume that I do NOT need to put the plastic Oil Pump gear back onto the crankshaft when re assembling? Since it is not doing...
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    Testing temp alarm

    How can i bench test the sending unit for my overheat alarm. 0g369283 40 hp 30 jet 1996
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    When to remove reed cage and center main bolts

    Good evening I am in process of tearing apart my 40 horsepower Mercury powerhead and the manual says to bend back the tabs on the Reed cage bolts and Center main Bolt the next step it says to remove 17 both securing the crankcase cover to the block but it never says when to remove the Reed cage...
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    Manual needed

    S/N 0G369383 merc 40 hp 1996 need source for shop manual to do a rebuild. Thanks
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    Compression issue

    My 1996 merc 40 sn 0g369283 was running fine and then all of a sudden one day developed a knock in the top end. I thought of doing a compression check first on the top cylinder is 108 and the other ones are all 1:05. I am thinking I should keep running it as long as I can get it to run and then...
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    Merc 40 stalls

    0G369283 SN. 96 Mariner 40 hp30jet. The engine is new to me call so it is no longer a jet it's been converted to a prop Drive. What I've done, checked compression 118 to 120 on all cylinders, replaced water pump and gear oil, replaced water separator cartridge and inline fuel filter, got new...
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    1994 Johnson 130 starting problem

    I have been asked to help a friend get his 94 Johnson V4 130 started. He reports good fuel, good battery, engine turns over, the kill switch is engaged where it should be. I have advised him to get some new spark plugs as a first thing to do, he is not familiar with the engine. What should...
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    Break in questions

    Well today finally got my 83 chris craft scorpion 210 5.7engine in the water. Complete engine rebuild. New stern drive. I had a couple issues and could use guidance. 1 tach not working. My buddy connected the ground to the hot lead by mistake. Would this blow out the tach? Reads pegged high...
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    Tilt trim pumP upgrade hydraulic lines

    I got te pump with the plastic reservoir to replace the one with the reverse lock valve.... Probably not a surprise to anyone here the hose fitting doesn't fit in the pump it's too small. What's the solution to this problem. As always thank you for your advice!
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    Hydraulic assist question

    Removed 88 steering cable then was moving out drive side to side to try and grease things and loosen em up. Looked in bilge and saw that the power steering pump reservoir had overflowed a couple ounces into the bilge from doing this. Engine off all the time. Is this normal? How hard should it...
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    Advice upgrading trim pump

    Hello I have an older system that uses external reverse lock. That erl is leaking oil. what newer type pump should I get to eliminate the erl and how do I install the hoses of the new one. Many thanks.
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    Electric Choke wiring

    So I couldnt rebuild my Qjet because it was missing parts, but I am getting a rebuilt one with electric choke. Q.. How do I wire the electric choke since there is no existing wire in the harness for it? Thank you as usual.
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    qauadrajet choke question

    I have a quadrajet 17059292 and am rebuilding as the last step of rebuilding my mercruiser 83 5.7l. There is a choke pull off, but I no other choke mechanism or coil etc. on the carburator or manifold etc. I am having a tough time figuring out if there is a piece missing (the choke), or if the...
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    Mercruiser 5.7 Cooling question

    I am rebuilding a pre 86 5.7. The thermostat housing that is there is the original kind. Totally rusted out. I was looking for a new one, and the original kind is meant for log style manifold. My engine has been upgraded to the center style risers. There seems to be a different thermostat...
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    carb for mercruiser 5.7

    Hello, I am in mid rebuild on 83 Merc 5.7. The carb that came with the boat and is totally in need of repair is a quadrajet. I have read a lot of bad stuff about them here, I am wondering if there is another simpler, or more reliable carb that I can put on there instead. What is the standard...
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    Merc 5.7 help needed

    1984 5.7 Today I installed new SEI Oudrive and went for a boat ride, heres what happened. 1. Rough starting, but have a rebuilt 4 bbl carb, gas is not great. 2. When it did start, would stall at idle, then be hard to start again. 3. When it was in neutral, the engine will rev up to normal...
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    Pre alpha conversion?

    I was wondering if there is another kind of outdrive that will bolt on in place of a pre alpha. Just wondering because I am likely going to replace mine and seems like later models are much more common and parts are more easily found. As usual any advice is appreciated. Thank you. Happy...
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    Finished restoratin now have engine trouble

    Today I finished the restoration of the hull and topsides, the engine, Mercruiser 350 with pre alpha outdrive started well, but when brought to an idle stalled out. Also the boat has a jackshaft. The rear end of the drive train is making an intermittent knocking or banging sound prior to the...
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    Mercruiser Tilt Trim Wiring

    Good evening friends, I am trying to finish a project, heres where I am at. Boat had no tilt trim wires, installed new senders, purchased a trim gage. I can find the little terminal block near the trim pump, but cant find any wires in the dash for the gage. There is a new shifter that has a...
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    Flapper valves in 86 Mercruiser pre alpha

    One more question for tonight. Is it true the motor has to be removed to replace the flappers. I know for sure one is gone. I know they go inside where the flexible couplings are, but the local mechanic didnt mention having to remove the engine, however I read that somewhere you have to...
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