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Part# 15-05373
MFR Model# 02-29SO
Engine ApplicationDescriptionPart Number
337UL, 447UL, 503ULPull Start Retention Kit15-05373


The GPL Starter Kit for Rotax 2 stroke engines make adding electric start capabillities to your engine simple. The kit installs on the magneto end and only adds 3 inches to the length of the motor with the pull start retention kit installed, even less without pull start. For air cooled engines with oil injection you can add the Oil Injection Kit to contine to use the oil pump.

The basic kit comes with everything you'll need to install the starter on the engine.

You can also purchase the Installation Kit that includes all the parts required to hook up the electrical portion of the installation. In the Installation Kit you'll receive voltage regulator, battery cables, starter button, starter solenoid and more. There two Installation Kits available and the only difference is the length of the positive battery cable, 5 foot or 11 foot.

The Deluxe Starter Kits include the Basic Kit as well as the Installation Kit allowing you to have everything necessary to complete the installation.

For a complete list of what's included please download the instructions here: GPL Instructions (PDF)

California Prop 65 Warning Symbol

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. www.P65Warnings.ca.gov

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I have been using the GPL starter on my Hurricane with the Rotax 503 for 10 plus years with great success. I have mounted the GPL starter with out the pull starter. I am using the aluminum plate to seal up the adapter plate. I would highly recommend this starter for the Rotax 2 stroke engines.

Kirk N
November 11, 2018


Alain P
November 9, 2017

Kit was missing a bolt

Mel G
April 5, 2021


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does the Basic kit Part # 15-06473 (Rotax 503) come with the 02-26-D3, 02-26-D4 Main casting or both? The instructions lead you to believe it comes with both.

This kit comes with the 02-26-D4 Casting.

Q: This is not clear. Am I getting a Rotax 503 engine?

This is the starter kit for the Rotax 503. It does not include the engine.

Q: Does kit #15-08341 have the regulator/ rectifier for rotax 503?

Yes a regulator/rectifier is included in the deluxe kit.

Q: I have a common rotax 447 Id like to put a GPL Starter on. Which basic kit will I need to make this happen? Does 15-06473 come with any cables?

The basic kit comes with everything to put the starter on the engine, you would need the deluxe kit to get the cables and electrical connectors.

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