Jim Carter sells the lower hose for use when you replace a 216 with a 235. I bought one for my 50 COE and worked fine, although the hose seems a little flimsy and thin walled. This has worked fine for 3 or 4 years. This may be the same size as the 261, best to call them and check or research whether a 261 water pump is the same or same inlet diameter as a 235.
Kent
