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  1. G

    175 2 stroke wont rev past 2k

    Symptom persisted today on a test run. Components would have been cool to start test run. So I don't think it's a heat issue. If it's not spark what else could cause my symptoms? Could the advance module be limiting timing?
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    175 2 stroke wont rev past 2k

    Well I'm back with the same symptoms not sure if it's the same problem. Boat has been running great since the switch box replacement until last outing. Was on plane running about 4k rpm all of a sudden dropped off plane and started running poorly. Boat would not plane or build rpm just as...
  3. G

    175 2 stroke wont rev past 2k

    So i swapped inner and outer switch boxes and the condition switched banks. I think i found my issue
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    175 2 stroke wont rev past 2k

    STATUS UPDATE Did a spark test tonight. STBD bank has spark Port bank does not. that would definately keep me from building power. Is it safe to say switch box is causing this? The switch boxes are unbolted from the motor right now to allow voltage readings on the inner box (this shouldnt have...
  5. G

    175 2 stroke wont rev past 2k

    I will be trying to check for good spark at all cylinders tonight. I will check plugs and wiring at that point as well.
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    175 2 stroke wont rev past 2k

    got a chance to do some trouble shooting tonight. Weather is crap so sticking to non running checks. nothing standing out yet. No air leaks found in fuel lines i modified. bulb looks good. gets firm. As far as i can tell no anti siphon valve. static resistance tests of stator, trigger and...
  7. G

    175 2 stroke wont rev past 2k

    that sounds very similar to my problem. fires right up. but just wont build rpm feels sluggish wont pass 2k. starts right up and idles nicely.
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    175 2 stroke wont rev past 2k

    I hope to get some time this week to run through the stator and switch box electrical tests per the manual.
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    175 2 stroke wont rev past 2k

    Have not checked spark with the tester yet.it is one of the items on my list. I know this can help identify switch box issues as well Carbs were rebuilt at the beginning of last season. Full tear down and rebuild. As far as the fuel lines I deleted the section that has the T fitting for the oil...
  10. G

    175 2 stroke wont rev past 2k

    Og804616 is the serial number. Is there any type of limp mode on the motor? Shift interupt switch have any effect on max rpm?
  11. G

    175 2 stroke wont rev past 2k

    Took the boat out for a test run yesterday and it would not rev above 2k rpm or plane out. It started fine and didn’t seem to stumble or hesitate. I have recently done some work on the motor…. Deleted oil system and switched to premix gas. Oiling system shouldn’t have an effect on max RPM...
  12. G

    Mercury 175 wont shift

    Tapping up from the bottom plus soaking with ATF for a week i was able to free the shift shaft!
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    Mercury 175 wont shift

    https://www.marineengine.com/parts/mercury-outboard-parts/v175/0g760300-thru-0g960499-usa/throttle-lever-and-shift-shaft here is the parts diagram for my motor. Based on that DWG i am thinking the only binding could be between pc 46 (shift arm?) and the midsection, or between 46 and 43 (link...
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    Mercury 175 wont shift

    I've been shooting PB blaster and ATF into this area but it hasn't budged yet. I can get it to move slightly by tapping with a hammer. I am afraid of bending the shaft however, it seems to be unobtanium.
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    Mercury 175 wont shift

    I am assuming no zerc fitting to grease this area? Lower is dropped and shift cable already disconnected. I will give this a shot and see if it loosens up. I have been spraying with PB blaster and ATF to see if I can loosen it up but it hasn't budged yet. I am afraid to really beat on things...
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    Mercury 175 wont shift

    well I picked up a used engine hoist and ordered the eye bolt for lifting the power head. Hopefully the bolts aren't rusted into the midsection and I am able to separate them fairly easily. Not sure what I will do once I gain access to that area. Heat and penetration oil until the shaft loosens...
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    Mercury 175 wont shift

  18. G

    Mercury 175 wont shift

    I will check the lower out. But haven't I narrowed it down to the engine half of the linkage since its still frozen with the lower disconnected. Does any one have experience with the upper shift shaft binding? Is it true I have to pull the power head to get to it?
  19. G

    Mercury 175 wont shift

    If the lower is disconnected from the engine and the shift cables are disconnected, what else is left to bind? Could it be corrosion at the upper shift shaft?
  20. G

    Mercury 175 wont shift

    It was in my garage. Used last for black mouth in January. Shifted fine at that time
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