Yamaha F225 Outboard Rebuild | Yamaha F225 Powerhead Rebuild | Boats.net

Buy the parts used on our Yamaha F225 outboard rebuild here: http://bit.ly/Yamaha-F225-Powerhead-R...

Here, John Talley takes you through a powerhead rebuild on a 2004 Yamaha F225 from start to finish. We’ll start with the bottom end, and John will show you how to install the crankshaft and pistons. This is a complicated process, since you’ll need to take numbers from the crankshaft, crankcase, and connecting rods to get the right bearing sizes. We’ll also install pumps, hoses, and close the crankcase cover.

HEAD INSTALLATION - 37:25
With the bottom end complete, we’ll show you how to install a top end assembly on a Yamaha outboard. The heads on this unit were shot, and Yamaha offers complete assemblies for the right and left side. We’ll need to remove the cams cam chain tensioner to get this done, and then we’ll get the heads bolted onto the engine. Getting the correct torque is essential here, and John will lay out the precise specs for each bolt.

ELECTRICAL SYSTEM - 49:00
With the heads installed, we’ll turn to the electrical system. John will show you how to install a flywheel on a Yamaha F225, and then we’ll work on installing the camshaft gears and setting the timing. We’ll also install the temperature sensor, regulator rectifier, the wiring harness, and coil packs.

FUEL SYSTEM - 1:05:25
Finally, we’ll install the fuel system on the F225. John will show you how to test the fuel pump on a Yamaha outboard, and then we’ll work on reassembling our VST tank. Then, John will show you how to clean the fuel injectors on an outboard using a kit from Motion Pro.

Then, we’ll install the intakes and make several of the electrical connections as well as get the throttle linkage attached.

Our complete Yamaha 225 powerhead rebuild playlist, starting with the F225 engine teardown, can be found here:    • Yamaha F225 Powerhead Rebuild  

Need a Yamaha F225 lower unit rebuild video? Right here:    • Yamaha Outboard Lower Unit Rebuild | ...  

See the crankshaft and piston diagram for your F225: https://www.boats.net/catalog/yamaha/...

See the crankcase diagrams:

https://www.boats.net/catalog/yamaha/...

https://www.boats.net/catalog/yamaha/...

See the head assembly diagram:

https://www.boats.net/catalog/yamaha/...

F225 flywheel assembly diagram:

https://www.boats.net/catalog/yamaha/...

F225 electrical system diagrams:

https://www.boats.net/catalog/yamaha/...

https://www.boats.net/catalog/yamaha/...

See the fuel injection pump diagram here:

https://www.boats.net/catalog/yamaha/...

See the intake diagram here:

https://www.boats.net/catalog/yamaha/...

VIDEO HIGHLIGHTS:
Getting sizes for bearings - 2:00
Installing crankshaft - 4:00
Closing crankcase - 12:00
Assembling pistons and rings - 17:25
Installing pistons - 20:00
Installing windage tray - 32:00
Removing camshafts - 38:00
Installing heads - 41:30
Installing valve covers - 47:00
Mounting camshaft gears - 49:00
Finding top dead center - 52:00
Installing timing belt - 53:00
Installing stator - 54:00
Mounting the flywheel - 55:00
Installing wiring harness - 57:00
Opening the VST tank - 1:05:55
Testing the fuel pumps - 1:06:45
Replacing needle valve - 1:17:00
Cleaning fuel injectors - 1:24:30
Reassembling throttle bodies - 1:27:00
Installing intakes and fuel rails - 1:28:00
Installing intake silencers - 1:33:20

Find Yamaha outboard parts here: https://www.boats.net/catalog/yamaha/...

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In the video we’re working with a Yamaha F225 outboard motor, but you may have similar steps for your Yamaha outboard. If you’re not sure whether these steps apply to your motor, leave a comment and we’ll get back to you.