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Yamaha YDIS 1 and Code 01: What the Display Actually Means
Code 01 on a Yamaha gauge is usually good news. What 01 means on an...
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Yamaha Outboard Beeping: Alarm Buzzer, Warning Lights and Flashing Check Engine Explained
Your Yamaha outboard beeps at key-on, in neutral or under way? What is normal, which...
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Yamaha Outboard Maintenance Schedule: 20, 100, 300, 500 and 1000 Hour Service
What is due on a Yamaha four-stroke outboard at 20, 100, 300, 500 and 1000...
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Yamaha Outboard Serial Number and Year Code: How to Tell the Model and Year
Where the ID label sits on a Yamaha outboard, how to read the model code,...
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How to Reset the Maintenance Reminder on a Yamaha Outboard
Oil changed, but the maintenance reminder is still on? Here is how to reset the...
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Yamaha Outboard Code 28: Shift Position Switch and Other Common Codes
Yamaha outboard code 28 points to the shift position switch on the CAN generation of...
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Yamaha outboard won't start: lanyard, shift position and immobilizer messages first
Most no-starts at the ramp come down to a few simple conditions the ECU can...
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Why Yamaha outboard fault code lists from forums never quite match your engine
Forum fault code lists for Yamaha outboards contradict each other because numbers change meaning between...
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A pre-season routine for charter boats and club fleets with Yamaha outboards
Charter outfits and clubs need a check that anyone can run the same way on...
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Twin Yamaha outboards: compare both engines value for value
On a twin-engine boat, the second engine is the best reference you'll ever have. Which...
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Idle learning on a Yamaha outboard after throttle body or ISC valve work
After cleaning a throttle body or replacing an ISC valve, a Yamaha outboard often idles...
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Ignition coil or injector: test each cylinder on your Yamaha instead of guessing
Instead of swapping plugs, coils and injectors at random, the actuator tests let you trigger...
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Yamaha outboard live data: the values worth watching and what they tell you
A Yamaha outboard ECU can show dozens of live values. Which ones answer real questions,...
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Clearing fault codes on a Yamaha outboard: when it helps and when it hides the problem
Clearing a Yamaha outboard's fault memory takes seconds, but a cleared memory can't tell you...
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Salt water in the connectors: the early hints in your Yamaha's fault memory
On saltwater boats, corroded connectors often look like failed sensors. Which patterns in the fault...
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A weak starting battery can fill your Yamaha's fault memory with nonsense
A tired battery or corroded cable can make a Yamaha outboard log several unrelated faults...
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Diagnosing a Yamaha HPDI Z150, Z175 or Z200 today
The HPDI Z series is still common on bass and bay boats. Its ECU offers...
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Small Yamaha four-strokes, F20 to F100: what a scan tells you on a tender or skiff
Small EFI Yamahas from F20 to F100 have fewer live values and fault messages than...
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F300, F350 and XTO: so much ECU data that guessing makes no sense
The F275 to F450 family has the richest ECU data of any Yamaha outboard. How...
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F200 to F250: inline four or V6, and why the diagnosis reads differently
Yamaha's F175 to F250 range includes inline fours and V6 engines. The layout decides which...
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Yamaha F150 fault messages across the generations: what changes and what stays
The F150 has been built in many versions, and the ECU data differs a lot...
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Yamaha F115 and F130 in practice: what a scan actually shows on these engines
The F115 and F130 are some of the most common Yamaha outboards on the water,...
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Variable cam timing on Yamaha V6 and V8 outboards: making sense of VCT and OCV entries
On Yamaha V6 and V8 outboards the cam timing runs separately for each bank. That...
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Knock sensor entry on a Yamaha outboard: bad fuel, ignition or a wire
The knock sensor entry on Yamaha outboards reads as irregular signal, and that points at...
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Before you winterize: what to read from your Yamaha outboard in the fall
The best time to diagnose an outboard is with a warm engine on the last...
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First start after winter storage: a spring scan on your Yamaha outboard
The first morning back after winter storage is when small problems are cheapest to catch....
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Trim gauge acting strange on a Yamaha outboard: sensor, switch or relay
When the trim gauge lies or the trim won't move, the live data shows whether...
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Yamaha outboard digital shift acting up: shift faults, neutral detection, shift cut-off
Digital shift problems on Yamaha outboards come down to the lever sensors, the shift sensors...
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Electronic throttle faults on Yamaha outboards: what ETV, TPS and APS mean
Electronic throttle faults on Yamaha outboards read like alphabet soup. Here is what the ETV,...
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Watching cooling water pressure live to catch impeller wear early
The ECU never sees the impeller, but on many Yamaha four-strokes it reads cooling water...
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Gauge hours and ECU hours don't match on your Yamaha outboard: which one counts
The helm gauge and the engine's ECU each keep their own hour count, and they...
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Buying a used boat with a Yamaha outboard: reading engine hours by rpm band
The total hour count tells you little about how a used Yamaha outboard was run....
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Water in fuel warning on a Yamaha outboard: what to do before you leave the dock
The water detection switch only sees what's in the engine's filter, not the tank. What...
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Yamaha outboard won't rev past a certain rpm: is it limp mode or the boat
A Yamaha four-stroke that suddenly stops climbing past mid-range is either being held back by...
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Warning horn underway: telling oil pressure, overheating and battery apart
One horn, several causes. How to separate a real oil pressure drop from a sensor...
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Reading Yamaha outboard fault codes yourself: what the ECU actually stores
The ECU on a Yamaha four-stroke keeps a record of electrical and sensor faults, not...
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