2008 225 PRO XS BAD MISS AT ESP AT WIDE OPEN THROTTLE.
saturday felt like it was starting to miss slight but ran good.
went out today and 1st couple times ran great but later in the day had very bad miss esp at higher rpms almost felt like was shutting down but would pick back up.
no ck eng light on smartcraft.
Try pumping the primer bulb to see if it "recovers".
If pumping the primer bulb improves the situation, it's highly likely a FUEL DELIVERY issue (pickup tube in tank, antisiphon valve, fuel line, primer bulb, pulse fuel pump, restricted filter, or low pressure fuel pump).
If not, would be a good idea to monitor spark. Could be a spark plug, plug wire, or coil issue.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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its at a dealer they checked it in the shop and could find nothing
it seems like this happens with load or near wot.
what do you think?
At WHAT RPM was this occuring?
Were you reading that RPM on an ANALOG TACH or a Smartcraft Instrument?
Still recommend you see the above post (and it's recommendations).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
it seemed like above 4500 rpms from smartcraft
this was a very severe miss the whole boat would jerk when this happened.
Were there any corresponding changes in your Smartcraft Instrument (resetting, loss of data signal, etc)?
Almost sounds electrical.... if the problem can't be duplicated except in the water, under load, and seems to be a "rapid" miss, you MAY have a sensor issue (such as the MAP sensor, TPS, or ** Crankshaft Position Sensor **.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
No just the day before started to feel like surge but not as severe
smart gauge was normal and no ck eng light
this was like entire engine was shutting down.but is was not just missing that bad.
I'd recommend looking at the BASICS:
-Compression
-Spark test (all six cylinders.... including, as necessary "when engine is acting up")!
-Fuel delivery, Air/Fuel Pressure tests (again, as necessary, when acting up).
Be sure to take a visual inspection of the spark plugs. Pay close attention to the porcelain around the electode itself- ANY line that runs "even remotely lengthwise" should be "assumed to be a crack"- REPLACE THE SPARK PLUG(S).
Did you get a chance to try pumping the primer bulb when it's acting up yet????
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
tps, I took it out seems to have fixed it.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hemi1 »</TD></TR><TR><TD CLASS="quote">tps, I took it out seems to have fixed it.</TD></TR></TABLE>
I'm assuming you meant to say that you REPLACED the TPS, then took the boat out, and it seems to have fixed it?
(Clarifying so that someone with similar symptoms doesn't remove the TPS, and throw it out)
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
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