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Need code ID for Honda BFP60A, 8 short 4 long? (w some context)

F

fishschticks

New member
Bought a used skiff in Southern CA with a 60hp Honda. Engine ran great during pre-purchase test run. Next trip, cruising the harbor at low speed went perfect. On a later trip (also cruising) the engine cut out at low speed (possibly partially due to a closed tank vent), and the check engine light came on—no overheat warning. Pulled the code by shorting pins as described on other forums: 8 short, 4 long blinks (starts with 1 blink, repeats).

My mechanic serviced the engine (recent $6k rebuild prior to purchase), replaced a nearly clogged high-pressure fuel filter, changed oil (level was high), gear oil, impeller, and fuel/water separator filter. Engine now runs well when it starts, but still hard to start and check engine light remains (tried to clear it, didn’t seem to work as I got no blinks when doing so). New tank and gas installed. Starts with throttle, struggles without.

TLDR; Looking for help identifying the 8 short, 4 long code on a 2015 BFP60A, and advice on other possible causes (e.g., sensors, spark plugs, thermostat) since the code isn’t clear, I have no access to code reader/pc/shop manual (long wait times in high season) and starting is still difficult.
 
After doing a service on the motor and running with muffs, It seems like whatever the long 4 part of this code was has resolved and I’m only left with 8 shorts, which appears to be a throttle position sensor.

Any insight on the throttle position sensor in this sense with this symptom? Would seem to make sense
 
Hi,
I have an older code chart so I'm not sure if it applies for your outboard.
But the 8 code on my chart is for the TDC (cam) sensor in the head. See item 27 in the link.


The code description lists:
Faulty TDC sensor
Sensor plug loose or unplugged
Sensor wiring faulty

You might try unplugging and checking pin to socket fit then spray with contact cleaner like Deoxit.After reconnecting, gently wiggling the wires might reveal something.

Another thought is possible bad alternator diodes allowing ac current "ripple". Ripple is a condition that has the generating ac signal to "ride" the dc signal in the wiring causing it to be interfered with.This can cause all sorts of odd electrical behavior in 12v systems.

You can check for ac ripple at the battery posts while the engine is running with a digital multimeter set to AC millivolts.
Make sure your battery is fully charged and will pass a load test.
Most auto parts stores will test it for you free.
There is often some ripple but anything more than 50 millivolts indicates leaking rectifier diodes and might be causing your rough running issue too.

Lots of YouTube videos about doing the ripple test so you might want to watch one or two to familiarize yourself first.

Just a couple of ideas.

Good luck.
 
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