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    air silencer base screws

    The manual for my '79 100hp says when removing the air silencer base to get to the carbs (for a carb clean/re-build) to discard the air silencer base mounting screws and to use new screws when reassembling....I'm assuming since the manual says to replace with new screws that it must be of some...
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    battery replacement

    My manual for my 79 Johnson 100hp says to use a battery with 360CCA w/115 reserve...it says it says it's extremely important to use the correct polarity. On the other hand guys around the bass club meetings say use the biggest battery you can afford and or fit in your boat especially if your...
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    RPM's in and out of gear

    I have a '79 100hp Johnson. I read in my manual and on the board that I should be idling in the 650 range in gear and closer to1000 out of gear. As it stands right now my motor is idling at the same rpm's whether it's in gear or neutral...in other words if the throttle cable is adjusted to idle...
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    tilt and trim confusion

    I have a '79 100hp Johnson. I am trying to check the hydraulic fluid level. My service manual (original) says to check and fill the oil level "when the T&T cylinders are fully extended. Unit should be in vertical position". Are they saying the motor should be in the vertical position? I'm...
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    One more sparkplug question

    I have a '79 100hp Johnson (100tlr79s)...the original repair manual says I need Champion plugs, L77J4 with a 0.040" gap but I have seen posts here that suggest using a QL77J4 with a 0.030" gap on similar motors (year and HP not exactly the same but V-4 motor around the same age). I'm trying to...
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