Jeff,
The parts to fit an Onan into the 317 are well delineated in the PC1698 section 22, although is is specifically for the P218G so there will be differences around the starter, etc.
The adapter plate is HE403-2615, and because it has the HE prefix, you may be able to get one from Cummins/Onan as well. Sit down when you learn that Deere wanted over $500 for it recently and now it shows as "no price available" so it might be NLA...
Chuck
The parts to fit an Onan into the 317 are well delineated in the PC1698 section 22, although is is specifically for the P218G so there will be differences around the starter, etc.
The adapter plate is HE403-2615, and because it has the HE prefix, you may be able to get one from Cummins/Onan as well. Sit down when you learn that Deere wanted over $500 for it recently and now it shows as "no price available" so it might be NLA...
Chuck