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    how to install 1972 25 HP Johnson Key kill switch

    Find the 2 small black wires that go under the flywheel.----They are usually connected to a stop switch.----The circuit is CLOSED to stop the motor.-----
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    1969 Johnson 40HP Wiring Rebuild

    Wiring diagram is found at -----mastertechmarine------Or google outboard wiring diagrams.
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    Service Manual

    That year was when OMC was in " turmoil mode ".-----May not have printed a service manual.,----Use the nearest equivalent.----Not a lot of changes from year to year in that era.
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    V4 CROSSFLOW HELP,REBUILD.

    ???----Leave that hole alone !!----It was put there by the factory.------Look the block over carefully to see what the purpose is for this hole.----Work carefully on your rebuilding.-----Assumptions / mistakes can be costly.-----And I do not like that black sealer used on the crankcase half...
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    60's OMC small hub large hub props

    All use the same prop.-----Small hub for large boats.------Prop spins very fast so 10" is a big change.
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    Need help 1989 100hp johnson GT100

    The motor is running.-----But not running on all I believe.---Best to post compression numbers here.
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    1998 Crest - Mercury Force Motor cover hits Back Deck

    Do not tilt motor until after the block has drained.
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    Does my engine have a problem? Or is this normal behavior?

    Oil is mixed with the gas before the fuel goes into the carburetors.----Have oil pump output checked as per the procedure in the manual.----Post compression test numbers.----May simply require the low speed mixture screws to be adjusted.----Installed a new impeller recently ??----Tested your...
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    No spark

    No money spent testing for you.-----Have battery load tested ( even if new ) a free service at many automotive stores.-----Take starter apart for inspection and ohm test on armature.-----Inspect battery cables.
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    1998 Crest - Mercury Force Motor cover hits Back Deck

    Add some spacers so that motor is moved away from boat by 2" or so ??
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    1989 Johnson 120 v4 Engine issues

    Why all the new parts ??----Run with timing light and see if you can find the cylinder with ignition issues.
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    Can't see my boat

    Are you towing long distances or 20 / 30 miles at a time ?
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    Voids found after new transom install

    Use ---west system --6-10-----Epoxy mixes as it comes out of the tube.-----Not expensive and is injected with caulking gun.
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    1989 Johnson 175 GT Rebuild Thread

    A GT 175 should be a bubble back.-----With big bore pistons.----A GT 175 is different.-----Have one myself for parts / rebuild.----Also has to do with propshaft rating / marketing.-----They did have to get rid of many parts in the warehouse in those years too.
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    78 85 hp johnson javelin

    Well------I could rebuild your motor powerhead and lower unit without glancing at a manual.-----So do not make any assumptions.---Check the fuel pump diaphragm !!!
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    78 85 hp johnson javelin

    Not uncommon to buy an " issue motor " these days.----Put away your axe.-----Stop replacing parts.---Start some orderly trouble shooting.-----These motors in good condition run very well indeed.
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    80hp evinrude sticky throttle

    Is it 80 HP or 1980 model ?-----Model # is ?----Without pictures it is hard to tell.----But inspect throttle cable.----Doubt you have to replace control box for a simple issue.----Inspected flywheel key ?
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    78 85 hp johnson javelin

    VRO was introduced in 1984 model year.
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    Loss of power- 40hp Evinrude E-tec jet

    Checked flywheel key ?
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    78 85 hp johnson javelin

    There is no VRO on 1978 models !--------Check fuel pump diaphragm.-----And how did this motor run for you last season ?----Water pump impellers need to be changed every 5 years or so.----Perhaps remove bypass covers ( 4 of them with 6 screws each ) to inspect pistons / rings.
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