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  1. jerryjerry05

    Force 120 Outboard Low compression - rebuild it?

    The checks in the mail along with the other 2 greatest lies. Before you go further maybe find a machine shop that can do the work?? In my area I've found 1 place(50mi. away) that does that kind of work. He works out of his garage. Maybe fill out the profile and you might find your close to...
  2. jerryjerry05

    1971 Chrysler 20 HP Coil Wiring

    Looks like yours is a 1971. Your right about parts being hard to find. The points can look good and still need cleaning or filed?? Use a 120 or finer to clean the contacts, then check for spark. Franz Marine might have the points ???or Google antique outboard parts.
  3. jerryjerry05

    significance of same cylinder-pressure

    Force made a 120 with uneven compression on 2 of the 4 cyl. The top/bottom was 155 and the middle two were 145 It didn't make any difference in the way it turned over. But if one cyl. gets beyond 25% it can make it really hard to turn over, this affects most of the 3 and 4 and 5 cyl. motors.
  4. jerryjerry05

    Force 120 Outboard Low compression - rebuild it?

    The head removal can be a B&^%H Take your time and if the bolts don't come easy? Use PB Blaster, Krol or any good penetrating oil. A propane torch comes in handy too. You can remove the port cover on the side and inspect the side of the piston and see inside there. I bought a snake camera $11...
  5. jerryjerry05

    Intermittent "cough" during startup.

    No "tank test" refers to a test using a test wheel. Not many have the test wheel and the 1000gal tank.
  6. jerryjerry05

    Intermittent "cough" during startup.

    Testing while tied to the dock is about the same as testing in your yard. You can do the tests on the trailer but problems need to be addressed in the water and in gear moving. The rpm's on the trailer or in N 11-1200 in gear 750-800
  7. jerryjerry05

    significance of same cylinder-pressure

    The low pressure really doesn't make any difference. When the pressure gets way off past 10-15% then it can cause starting problems. The uneven pressure makes the motor real hard to turn over. One of my customers has a 2005 200 Yam. Top cyl. has low comp and lightly scored. Yet runs like it has...
  8. jerryjerry05

    1967 Sea King 6hp - Low Compression

    Comparing the old gasket to the new. The holes don't need to be the same. As long as the comp ring is the same it should work. If the carb isn't too corroded??? it just might need a cleaning and no new parts?? Just make sure the jets are clear. A welders tip tool does a good job of cleaning the...
  9. jerryjerry05

    Intermittent "cough" during startup.

    The one turn out from lightly seated might not be open enough for your motor???? One customer needed his 84/85hp 3 carbs open almost 3 full turns out??? Sometimes: Different carbs need to be set at different levels??? Start at 1 turn and adjust from there. Turn 1/8th turn on the top carb and...
  10. jerryjerry05

    1967 Sea King 6hp - Low Compression

    42# on the top cyl. what's the reading on the bottom? Could be something as simple as a head gasket?? This could be the part# 27-F525529 does it look like this? Found this on ebay 25$ ebay# 323634192003
  11. jerryjerry05

    No spark 90 hp 1999 Force after switchbox replacement

    It's the connector on the end of the wire on just about every Mercury electrical part sold. The plug in, male/female connector. Usually turning black from overheating.
  12. jerryjerry05

    Corrosion Removal and Repainting My 1990 Force 90

    I've found it at a few Mercury/Mercruiser dealers and some marine parts store's, like West Marine Google.
  13. jerryjerry05

    No spark 90 hp 1999 Force after switchbox replacement

    The trigger and coils rarely go bad on these motors. The Amphenol connectors do go bad. They get hot and loose contact. The coil in some cases can go bad but not all 4 at once. I've not seen a trigger go bad for a LONG time. In 95 they went from Force/Prestolite to Mercury ignition. In some...
  14. jerryjerry05

    Force 75 threw a magnet at us

    If the tach is the wrong or bad it can cause a no spark situation.
  15. jerryjerry05

    No spark 90 hp 1999 Force after switchbox replacement

    outboardignitiondotcom has test procedures for your motor, you can do the basic tests with a regular analog meter but the more technical you'll need a peak reading/DVA volt meter. pnwboat said the reg wouldn't stop the spark. But it can." from O.I. Disconnect the yellow wires from the...
  16. jerryjerry05

    Force 75 threw a magnet at us

    My opinion: Seafoam's a waste of $$ I use Chevron with Techron. Black bottle, looks like an upside down funnel. Mix it with 1/2 gal gas. and run through the system. The primer has a diaphragm inside and it can leak fuel into the carb and cause poor running at all speeds. Once it's running...
  17. jerryjerry05

    Fuel Filter

    Before the pump makes the pump work harder. Most older boats by now have a water separating filter(or should have) and that catches the big stuff. The same with the settlement bowl and the filter on the other pump.
  18. jerryjerry05

    90 compression on 135 hp

    The HF gives results just not the right results. The good is all cyl. are the same and that shows they're probably ok.
  19. jerryjerry05

    Starter engages the flywheel but won't spin the engine

    The one you have is easy to rebuild. The Sierra ones are the latest Chinese JUNK!!(and not the boat) If you want a rebuilt one?? ARCO starters are the only way to go. They're a US company and have good quality. A little expensive but you get what you pay for. But from the looks of your starter...
  20. jerryjerry05

    Force 75 threw a magnet at us

    They're gold because they only used them for a limited time. The older Prestolite ones were used for 10-12 years and millions were used on the different Chryslers and Forces. They fit 50hp 85/90 120/125 and 150hp. Yours fits a bunch of motors from Force to Mercury, to Sport jet, Mariner etc. I...
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