2005 115 tlrd Yamaha was fishing and ran fine for most of day. Went to make a move and motor sound funny almost like it was a 4 stroke. Cranks fine, & idles. So we headed to landing. Would not go over 8 mph loaded and went back were we was staying. This is what I have done so far. Check compression 125psi all four cylinders, changed gas, water fuel separator fuel filter, spark plugs. Ran after changed spark plug in lake and ran good for about 30 seconds then bogged down again. Only have spark on port side. Any help would be greatly appreciated. Thanks in advance.
