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    1990 Force 120HP carbs mix adjustment help

    I redid the timing it was at 29 so put it back to 28. RPM on the hose is at 1100. I have a lot of room to raise it now. The other day on the lake I had it up almost all the way to hold idle in gear. I hope this makes a difference in the water. It sounds way better on the hose then before. I...
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    1990 Force 120HP carbs mix adjustment help

    Ok I think I got it. I did 3 1/2 out for the lower gear shaft. I Set the interlock shaft and towershaft arm at the same height and in neutral by playing with the 2 nuts. I adjusted the neutral switch cam to the switch button. Adjusted the eccentric roller for idle and the throttle link shaft at...
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    1990 Force 120HP carbs mix adjustment help

    So in the 1990 96, 90, 120, 125 book they mention to screw the shaft in all the way and back out 4 turns. I wonder, are those 4 complete 360 turns or would 180 be considered a turn? My problem engine was out half a turn so completely bad. The other good engine is out 2 full and a half.
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    1990 Force 120HP carbs mix adjustment help

    Ok I took the boat out yesterday and of course the rebuilt engine was giving me issues to stay at idle while in gear. So, I readjusted the pivot throttle cam to touch the roller perfect. But then I still didn't get idle in gear so I had to adjust the throttle link bar to extend it so it can push...
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    1990 Force 120HP carbs mix adjustment help

    This is a double post
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    1990 Force 120HP B model cannot seem to find the issue with sporadic no start

    Nordin thanks a bunch for the reply, so yesterday was a bad day because of that engine. So when I opened the drain plug to let the water out there was a lot of water coming. I have another boat that I used to use it's an I/O and it never had that much water after a few hours on a lake or ocean...
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    1990 Force 120HP B model cannot seem to find the issue with sporadic no start

    I tested the CDI modules outputs and I got weird low readings the first time , tested again and got 220DVA on the engine that doesn't start. On the one that starts I get 190V on most and 185 on number 4. That's cranking I first thought for sure the CDI modules were bad. But I guess not. The...
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    1990 Force 120HP B model cannot seem to find the issue with sporadic no start

    So I have no sparg again. I tested compression and all are 120 to 125. Statotgets 250v DVAob all 4. and 350ohms on resistance as per specs. Trigger gets 0.9V on 2 and 1.3V on other 2 all DVA so more than 0.5 and resistance to hround 51oms on all. Do those two are fine. I don't have spark...
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    1990 Force 120HP B model cannot seem to find the issue with sporadic no start

    I have a pretty strong pressure water hose at the house. I didn't do it at the lake oarking lot
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    1990 Force 120HP B model cannot seem to find the issue with sporadic no start

    On the twin force 120hp I completely rebuilt one of the engines and the drive. I was able to successfully start and run the engine on a hose in the parking lot. As soon as I went to the lake it started but it would die in gear. Even adjusting the rpm did not help. The carbs air mix screw was...
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    1990 Force 120HP carbs mix adjustment help

    I definetly will test. The carbs were disassembled and cleaned so I wanted to adjust the screw for mixture. Don't want to run lean 1 and 1/8 sounds great. Can you elaborate on the spark plugs as far as what to look for in the color or build up. They are new plugs and they are thw flat ones.
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    1990 Force 120HP carbs mix adjustment help

    Thanks Jerry the motor is fully rebuilt and it now idles fine after changing stator. My question is on the air mix screw adjustment.
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    1990 Force 120HP carbs mix adjustment help

    So I set timing at 28BTDC. I tried adjusting the mix screws by the book but when I go counter clockwise I don't really get the bogging, stalling issue to go the other way until stalling again and adjust in the middle. So I read somewhere, maybe Jerry mentioned it somewhere don't remember, that...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Thanks but this has been fully rebuilt, machine shop, new pistons, rings all .20 oversized. I am at the broken carb tab, studder when running, bought another flywheel for good measure. When I took the old one off I heat it up and had to hammer it, so I don't know if the magnets were affected in...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Here is the piece. I don't think one bolt is enough. It holds the float. No real strength needed but some is good.
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Yeah I thought so. I am not too worried about the needle closing properly as it is pushed in by a tab on the float. But the manner in which it canbe safely attached is another story.
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    I guess I can give it a try. Any idea if the broken piece on mine can be reattached and if so what is the best way. Don't know if you can tig it.
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    ok, I am getting over the flu here so brain fart, since the middle carb had no nozzle for the gas hose I confused it with a top carb, omitting the choke fitting entirely. Sorry about that so I guess I have 1 top and 2 bottom that I got newer. in the pics of the 3 it is like you said thanks for...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Here are the pics of the 4 carbs side by side. Left is my broken one. The numbers show 589061-1 on the 2 I bought and on mine 589061-3. Plus mine has tye TC-106A-994 also stamped. The other2 just have 086 or 104 stampe. Outside identical except for tye aforementioned changes, of tye air jet and...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Hey racerone how would you repair the broke tab? Take it to a welding shop? Or try using a rod and a Bernzomatic?
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