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  1. J

    85 force lower unit drain plug

    Does the motor has tach? Any idea how fast is the RPM at full throttle while in the water? Or even at half throttle? It takes a little experience to detect one misfiring cylinder by sound alone. A quick drop cylinder test will let you know if there's misfiring. Have you installed a clear fuel...
  2. J

    85 force lower unit drain plug

    Thanks. Looks like a success story and a good reference for the future. Thanks again for sharing.
  3. J

    Troubleshooting 91 Force 90HP Tilt/Trim System

    As Jerry mentioned, the OEM T&T unit will virtually last forever except for those tiny oil seals in the spool valves. But if you have a new China made one, you'd be better off investing in an old OEM and just fixing it. Technically, during testing, the capping of the lower line to trim...
  4. J

    Lower Unit Bearing Carrier Leaking

    Actually, the service manual states 16-18 PSI for pressure testing and then followed by a vacuum test of 3-5 inches. So 10 psi is barely enough to detect the leaks.
  5. J

    85 force lower unit drain plug

    Sometimes you just got to do what you need to do to get things done. Let us know how it works out with a replacement screw. Goodluck.
  6. J

    Engine stopped high end on water

    Follow Nordin's advice first before delving any further. The symptoms points to exhaust leaks. So try running it on the water without the top cover and see if that'll make a difference.
  7. J

    Troubleshooting 91 Force 90HP Tilt/Trim System

    Unfortunately, to repair the T&T requires breaking the hydraulic line connection even with just the testing itself. Those hydraulic lines are really tough and made of stainless tubing. However, the valve body itself is not quite as tough. And it's really very easy to cross thread the fittings...
  8. J

    Troubleshooting 91 Force 90HP Tilt/Trim System

    Bleeding the system requires running full trim and tile and then going back down and doing this for at least three times. As for filling in the fluid, you should fill it up to the fill up hole with both trim and tilt at full down position. If the trim (bigger piston) would not go up (from full...
  9. J

    1988 50 hp force no spark?

    Well, we are on the 3rd page of this thread hopefully, it'll be the last page. Goodluck!
  10. J

    90hp Force 1991-1992 starter

    If you measure 12V going to the solenoid, technically, the solenoid should have a loud "click" meaning it is engaging. If you do not hear the loud click then the solenoid is not engaging. Another test would be to directly connect the solenoid control circuit to the battery using jumper wires. I...
  11. J

    TC-135A adjusting

    What year and motor HP are we talking about? The spring loaded screw is referred to as Idle Fuel/Air Mixture adjustment screw. It does not set your idle rpm. Instead, it sets how rich the fuel-air mixture will be at idle rpm. Usually, this is set at 1 to 1.5 turn out from slightly seated. DO NOT...
  12. J

    1994 Sea Rayder 90 HP sport jet manual and serial number location

    A pic is necessary at least showing the ignition system and the carb section. With this info you can actually deduce the year and type of ignition system you have It would seem that all 90 HP starting from 1991 to 1999 have the Thunderbolt ignition system which uses the switchbox module. And...
  13. J

    85 force lower unit drain plug

    Because the drain plug is installed at the bottom, some people continue to use the leftie loosey method without noticing it only works while you are facing the back of the screw. So instead of loosening they are actually tightening the screw as ever. Or it could also be because the screw has not...
  14. J

    1994 Merc Force 90HP Stalling when throttling up (most of the Time)

    Can you report on the idle speed on the following situation: - RPM at idle neutral on muffs on the driveway - RPM at idle neutral in the water - RPM at idle in gear in the water Typical RPM for a fully functioning motor is, respectively as above: - 1000~1200 RPM - 800 ~ 1000 RPM ( a little...
  15. J

    1988 50 hp force no spark?

    With the DVA adapter connected to the Fluke multimeter, your selector setting should be on DC voltage. And then place the meter on peak hold (or something like that) wherein the highest voltage read is displayed even after you took off the probes off the stuff you are reading. You can post pic...
  16. J

    1988 50 hp force no spark?

    Unless, you are using a DVA (Direct Voltage Adapter) adapter for voltage reading on the trigger it is really very hard to take such low and high speed transient voltage. Not really sure what you meant by DVA analog multimeter. Digital multimeter like Fluke are referred to as DVM or Digital...
  17. J

    1988 50 hp force no spark?

    The magnets for the stator (mounted on the circumferential side of the flywheel) is different from the magnet for the trigger (mounted on the very center of the flywheel. Very seldom this magnets fall off. But with the preceding background history of this engine, I would not be surprised if its...
  18. J

    125hp lower unit change

    I'm quite sure the 85 HP LU will fit. The late Frank A had a thread on this one. You might want to search it for confirmation. Not sure about the 90 HP. But yes, some people actually prefer the 85HP LU for its lower gear ratio of 2.01:1 while the 125HP has the 1.93:1 ratio.
  19. J

    1988 50 hp force no spark?

    Well, sometimes troubleshooting takes more than one major part to deal with. I am presuming you are using a DVA adapter for the voltage readings. You can check the trigger output using a DVA adapter and you should get 0.5+volt, at least. Reading is taken between wire pairs (green and orange...
  20. J

    1988 50 hp force no spark?

    Since it is used. Make sure you do the following before installing it. 1. Read the resistance of the blue-blue wires and it should be around 680-800 ohms. Anything less is a bad sign. 2. Read resistance between the green/yel wires and it should be around 0.5-1.0 ohm. 3. Read insulation...
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