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    Stern Drive transom lower right bolt fell out

    Is there a way to reinstall this bolt? It would come thru the transom down in the bowels behind the motor so I dont even know if I could see where it goes. Anyone else have this issue. This is on a 1989 mercruser outdrive.
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    1989 Mercury outboard lower unit question

    Is there a coupler between the lower unit shift shaft and the upper unit? Something to lock the splines together?
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    89 Mercury outboard 100 hp shift shaft alignment

    I replaced the water pump in the lower unit and now I have nothing at the prop. I tried the method listed on another page of turning the lower shaft all the way CCW until it clicks and this should have been neutral. But I still have no drive at the prop.I have changed several water pumps and...
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    100hp lower end replacement

    I have a 1989 4 cylinder 100 hp that needs a rebuild, I am considering purchasing an already rebuilt unit. With all the different models out there how do I know that I am purchasing the right unit for a bolt on replacement?
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    1989 Mercury outboard lower unit rebuild

    I am getting ready to replace the seals and gaskets on my 100 hp 4 cylinder outboard lower unit. What seals should I suspect is leaking water into the gear case? I will replace the water pump while I have the unit apart. I have done the water pump 4 times in the past, but I wonder if I should...
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    Mechanical fuel pump gph question

    I am still struggling with the rpms on my 1989 Mercrusier Stern Drive 350. The engine runs fine but tops out at 3500 rpm. The ignition timing is good and the engine runs really smooth. I have made sure that there are no restrictions in the fuel line My question is: are there more than one...
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    1989 25' Invader cabin crusier fiberglass stress cracks

    Would it be normal to see stress cracks in the gel coat of a 1989 Invader cabin cruser? The cracking is in a radial pattern around the stern drive on the transom.
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    Missing transom bolt on Mercruser outdrive to bellhousing.

    This past weekend my boat started taking on water in the engine bay. When I pulled the boat up out of the water and onto the trailer I noticed that one of the bottom bolts that go thru the transom at the outside mounting bracket was missing. My question is with the engine installed I cannot even...
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    I have a 1989 mercruser tops out at 3000 rpm

    I have a 1989 mercruser 350 cu in GM that will not go above 3000 rpm. It gets the boat up on plane but 3000 rpm is all it will do.
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    Trim Tab relay location

    I have a 1989 Invader stern drive that I am trying to fix the trim tabs. The pump runs but does not send fluid to cylinders, does anyone have an idea where the relay might be located? I have searched the engine compartment with no luck
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    Mercruser 1898 5.7 with thunderbolt ign problem

    I have a 1989 5.7 sterndrive that will not accelerate above 2,000 rpm. The ignition module was changed recently. I now find out that I may have paid for the wrong module as there are two different types. One has advance and one does not. The new module has three wires where the one that was...
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    1989 Mercruser 5.7 will not get over 2000 rpm

    I just replaced the water fuel separator filter and drained a lot of water out of the bottom of the fuel tank. Motor starts fine and has good oil pressure, water temp is 160F. I open the throttle wide open and all it will do is 2000 rpm.
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    Trapped air after filter change

    Can there be air trapped in the fuel line going to carb after changing the water separator filter? or would it bleed itself. Do I need to crack open a fitting at the carb to release the air?
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    new vs. old thunderbolt ignition sensor

    I recently replaced the sensor on my thunderbolt ignition. The old unit had two terminals, one terminal had two green/white wires and the second terminal had one with one white/red wire. The new unit has one red/white and one green/white both are pig tails with connectors on ends. Where does the...
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    Wiring for ignition module

    My 5.7 Mercruser quit while pulling into the dock. (Lucky Me) In diagnosing the problem the engine will not refine. Putting gas down carburetor has no effect. So I removed the distributor cap and saw that the Module had disintegrated. I purchased a new one only to find out that the old module...
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    Fuel Filter??

    This past weekend my 1989 Mercruser 5.7 would not come up on plane due to only reaching 2200 rpm at WOT. I am thinking fuel filter. Any other suggestions?
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    Need info on plastic tanks in the engine well

    I have purchased a 1989 Invader 240 rear cabin. When I open the engine hatch, I see two white plastic tanks, on on the left beside the batteries and one on the right right at the transom. I think the one on the right is for fresh water. The one on the left has two hoses connected to the side of...
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    Electrical question

    My marine radio (vhf) doesnt work. I have tested the incoming connection and I get 12.7 volts. If I take the connections loose and use the two wires coming out of radio and touch them to directly to one of my batteries the radio works. When I hook them up to the incoming (pos & neg) I get...
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    1988 Invader 240 aft berth instrument panel

    I just recently purchased this boat, it seems to be in great shape. However the instrument panel has a vertical row of toggle switches and all the labels are faded beyond being able to read what the switches go to. Is there any help out there?
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    1988 Invader

    I have recently purchased a 1988 invader. The instrument panel to the left of the steering wheel has a vertical row of toggle switches, however the labels to identify these switches is faded and unreadable. Can anyone advise me on where to find out what these switches go to. Better yet can...
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