VIKING 130 SERVICE BULLETINS

VIKING 130 RECOMMENDED UPGRADES ARE ALREADY IMPLEMENTED ON 2023 ENGINES FORWARD

Update to Roller bearings in gearbox. This will increase the life of the gearbox and is highly recommended.
All engine mounts now incorporate a right offset to help counter torque.
ECU software continues to improve, and updates are available.
All fuel injection hose shipped is now using a T2 or above 225 psi rating. SAE 30R14T2 or Gates 4219BF
Heater mounting now recommend extending hoses into the cabin about 6” to make service work easier.
Engines shipped after 2/11/23 have the bypass hose between the coolant exit of the cylinder head and the Thermostat plugged with a 14mm stainless steel dowel pin. stainless dowel pin. This provides more stable thermostat operation and higher engine temperatures in the winter. Combine this with a 1/4” hole in the thermostat, instead of the jiggle pin. Test after modifying on the ground for proper thermostat operation after air is removed from the system.
Conical Rubber engine mount internal spacing tubes are now 1/4” longer to prevent cracking at the rubber edges.
All engines now use a 0-psi cooling system and no pressure cap. To remove pressure from an existing system, the bottom rubber sealing disk from the radiator cap is removed. This requires a larger catch tank such as this one: Dorman 603-001.
Optional weight saving exhaust system available. Save 4 lbs
Optional weight saving intake system available. Save 4 lbs
Optional weight saving gearbox available. Save 4 lbs

Viking 110/130 Flywheel COUPLING update

The batch of parts distributed are recalled and replaced by a heavier duty part. Even though there has never been a failure, we do not take any chances. The part is already in use on the 180 hp turbo engine and has considerable testing already completed. It will fit the 110 and 130 engines directly. Anyone that has a part like this picture it should be replaced. No engines should be flying after 7/17/2017 unless the flywheel drive disk looks like the one in the picture. Update: 2023 - There is now a heavier duty triangular drive coupling used. It does not have the indents as shown in the “old, recalled flywheel coupling.” picture.

NEWER STYLE FLYWHEEL COUPLING ALSO ACCEPTABLE

Viking 130 fuel bleed orifice

A 0.010 orifice install to bleed possible excess fuel pressure from fuel lines while aircraft is parked. This can happen if pressure leaks by the regulator needle of the high pressure engine driven pump and into the aircraft fuel system. Pressure could build to over 100+ psi since the rail pressure is 2200 psi in the stainless steel injector rail. Please call if more information is needed.

Exhaust Baffle

Exhaust Brace With Spring

The exhausts must have a spring attachment as shown below to help with any cracking issues. It will crack without this spring. This also takes the place of any other bracing used previously.

Viking 130 ecu and wire harness updates

If you have not had your ECU updated since January of 2018 - YOU MUST have it done prior to flying. We do not want anyone flying unless this has been completed.

Simply return your ECU to Viking at:

735 S. Airpark Rd. C3

Edgewater, Florida 32132

There is no charge, just include return shipping. If you have any questions or your not sure yours has been completed you can email Alissa@vikingaircraftengines.com

Viking view wire

Some have mistaken the Viking View (Green/White) wire as a negative ground. If this wire is grounded you will disrupt the proper operation of the ECU. If you DO NOT have a Viking View instrument, this wire must be capped off and not used. If you DO have a Viking View, simply use for the Viking View ground as instructed with instrument. That means, connect to Viking View ground wire. It does not mean to connect the wire to any ground, it IS teh ground for the Viking View.

if ecu power is shorted to ground

We have had a few circumstances where installers have shorted their ECU power to ground, when this happens you burn up the ECU making it unrepairable and likely damaging other 12V components on the engine. In order to protect the ECU during installation of your electrical system, it is suggested that the ECU power wires are protected with electrical tape and installed after other electrical work is completed. You might also use a 1 amp fuse (increase up to 5 amp if it keeps blowing) between the ECU power leads and the main power buss the first time power is applied (this is just a quick test to verify that there is no short and obviously should not be left in place, the ECU should remain unfused as shown in the diagram for normal operation)

Except for emergency situations you should not run the system without batteries engaged.

Do not crank the engine without the starter relay or it could introduce a large spike into the system damaging the ECU.

A symptom of a burnt up ECU is a strong electrical smell from the ECU enclosure.

You will have to replace the following on the engine if power is shorted to ground:

Your ECU

Crank Sensor

CAM Sensor

Variable Valve Timing Solenoid

Variable Valve Lift Solenoid

Coils (4)

The cost of a new ECU is $1500.00

Cost for additional items: $815.00 (subject to change) These items MUST be replaced.

None of this is to indicate that the ECU is fragile in anyway. It is just like any other electrical device where voltage reversal is not acceptable. We feel the lack of fuses increase the overall safety.

Removal and Re-Installation of Gearbox

This should only be done if consulted with Viking. A new centering bushing is 100% required when re-installing.

Viking 130 and Viking Turbo Valve Adjustment

Be sure to just “check” the valve lash without loosening any hardware. Nine times out of ten you don’t actually have to adjust anything.