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If I remember correctly, the '86-87 motors did not have QuickStart features so the timer base for them would only have 7 wires total on the connectors.
The '88 and later models with QuickStart would have 8 or 9 wires.
The funny thing is we were running a 1987 style flywheel with the newer style timer base... it didn't start very well but it ran okay for several years at least (until the engine blew up).