The spark plugs are good and the correct size, I figured what happened as in the days when cars had carburetors like the SUs on British sport cars, when it's super hot and the motor is in the sun the gasoline left in the carburetor vaporizes creating a block. I did the following and it worked; before I turn off the motor I disconnect the fuel
line to the motor and store the tender
under the boat
(catamaran) so it's in the shade, when I go to start it again I reconnect the fuel
hose and it starts, two days now, with the extreme heat we are having.
Thanks for opining Black Eagle. it's always good to see another view.