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    99 3.1l ox66 wont rev (what am i not thinking of here)

    Issue resolved. Mix of bad knock sensor and awful clogged injectors. After cleaning they all flowed 504 statically, before I had one at 288, 312, and the others were in the low to mid 400s. Boat runs exceptionally better now.
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    99 3.1l ox66 wont rev (what am i not thinking of here)

    Little update: Compression test on all 6 checked out, all even. Replaced knock sensor with a new (used) one, that one seemed to work like it should. Injector Rehab called me yesterday, they had cleaned 4 injectors and 2 were over 50% clogged, said I should have them back in a few days if the...
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    99 3.1l ox66 wont rev (what am i not thinking of here)

    I compression tested it and changed the plugs during troubleshooting. Compression was all 100-105 on each cylinder with my cheap china gauge. Have good spark on all 6cyl at cranking (Verified this last night), it could be dropping under load though..... Injectors are sent off to Injector Rehab...
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    99 3.1l ox66 wont rev (what am i not thinking of here)

    I don't disagree with you at all, 1 cyl being down doesn't seem like it would cause all of the problem.... but we'll see. As for the knock sensor I really don't have a clue, I've heard they will cause weird issues. I've also read if unhooked they will lock timing at 7* BTDC I believe, and...
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    99 3.1l ox66 wont rev (what am i not thinking of here)

    Yessir I believe that is correct. Making "some" headway I think. 1. Checked the knock sensor: AC volts, red lead to sensor wire, black lead to sensor body I could tap on that thing as hard as I wanted with no voltage fluctuation..... Went ahead and ordered a used one. 2. Pulled the plugs again...
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    99 3.1l ox66 wont rev (what am i not thinking of here)

    It's a 1999 3.1L 200hp V200TLRX if that makes any difference. 1- Doesn't limit RPM in neutral (will rev in neutral, and in reverse), just bogs and stays steady just under 2000RPMS in forward. 2- Tried to disconnect the shift interrupter switch to see if it would run/get over 2k rpms in forward...
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    99 3.1l ox66 wont rev (what am i not thinking of here)

    Disconnected the O2 sensor - No change Pulled the injectors and mailed them off this morning to Injector Rehab Re-installed the LP system and checked them via the squeeze ball test to see if any leaks... Really thinking this is an electrical/spark problem under load.... Is there a good test...
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    99 3.1l ox66 wont rev (what am i not thinking of here)

    That's the only thing that makes a lick of sense to me. Exhaust pushing water away from the prop thus decreasing load and allowing it to rev. I plan to: 1. Swap the old LP pumps back on and see if anything at all changes. 2. Disconnect the o2 plug to see if it changes anything (wont go over...
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    99 3.1l ox66 wont rev (what am i not thinking of here)

    Less load in reverse than in forward was not something I thought of or considered. Just assumed since the prop was submerged and loaded it would be the same. Rev in reverse would hit 5k quick and easy. Forward I could hold it wide open, fuel pressure steady around 35psi, but rpm wouldn't get...
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    99 3.1l ox66 wont rev (what am i not thinking of here)

    No sir, I haven't. Im leaning towards a timing/spark issue though. I haven't disconnected the O2, to see if it would rev up (I know keep it under 4000rpms). It's just really strange to me that itll rev fine in reverse, but not forward.
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    99 3.1l ox66 wont rev (what am i not thinking of here)

    Hey folks, I have a 1999 3.1l 200hp ox66 engine. A little back story, boat ran last year but a little rough, pulled the kids on the tube fine. Decided to do the LP delete, first time out would surge at mid throttle or under, wide open was okay, but it's cold out so didn't trim up or stay in it...
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    80's 150HP black max problem (won't run when shifted)

    I've not had a chance to dig into mine more yet, but I know backpressure and load can play havoc on a seemingly "good" engine. I'm leaning towards a exhaust gasket/water getting into the cylinders........ possibly a powerhead gasket issue, When the lower unit was removed for a water pump the...
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    80's 150HP black max problem (won't run when shifted)

    (ON AN OUTBOARD) Carbs are mechanically controlled, when you move the throttle handle all the way forward, the carbs should open fully, boat on, or off does not matter. If they're not opening fully you'll need to do a link and synch
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    80's 150HP black max problem (won't run when shifted)

    Hey Chris, appreciate the reply. Smoke is very white, I know these motors smoke, but this ain't the normal 2 stroke light blue smoke. I'm under the assumption it's steam as well. Odd that the compression is "good" but water getting into the cylinders. Plugs 1,2,4,5,6 all look the same, #5 is...
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    80's 150HP black max problem (won't run when shifted)

    Hey folks, I have an early 80's blackmax 150HP (I believe it's an XR2), all the usual tricks haven't worked. 1. Cleaned carburetors, double and triple checked. 2. Compression (cheap china gauge) is 85-95PSI on every cylinder 3. New water pump, new lower unit oil 4. New switch box (Had no fire on...
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    1999 200HP OX66 surging/cutting out

    I was thinking possibly the pressure regulator too, I'll pop the VST open in the next day or so and make sure everything looks clean. I did notice that once or twice when I turned the key to on, I didn't hear the HP pump kick on, but I could have just not been listening close enough.
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    1999 200HP OX66 surging/cutting out

    Never cleaned the injectors, planned to a couple years ago, but it was running fine so I didn't want to mess anything up. Will hook up a fuel pressure gauge next time I take it out to run it, it would rev fine in neutral, but I understand that free revving vs running with a load is entirely...
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    1999 200HP OX66 surging/cutting out

    Hey folks, I have a 99 model 200HP 3.1L ox66 yamaha outboard, motor has ran awesome for the past 5 years, took it out saturday and if I ease into the throttle and keep it under 1/3 throttle itll run and drive all day. If i try to floor it or push it over that point it'll fall on its face, and if...
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    1992 evinrude spark issues

    Hey folks I have a 1992 evinrude 200hp xp model# ve200slens I thought I had no spark, pulled all the plugs and I have spark on cylinder #4 that's it. I've disconnected the red plug,no change. I've disconnected both kill wires no change starter turns the motor over healthily compression is...
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    Skeeter top cap decals

    Hey guys I have a skeeter zx202c, I lost one of my decals off the side of the boat and I am looking to replace them. I'm not sure where i can get the raised domed oval decal, but i have considered using a skeeter sticker instead. Anyone have any pictures of their boats with decals or logos on...
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