help , having problem with 4 horse yamerhammer

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redriver1

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I just got a 1993 4hp yamaha. When i went to look at it, the guy i bought it from cranked it up and she ran fine. After puting it on my 14ft 1965 monarc took it to lake to try out. she fired up on second pull and off we went. while under way i noticed that there was no water coming from the pee hole. engine ran warm. got home removed lower unit, impellor for water pump was missing 5 of the 6 viens. replaced impellor, reenstalled lower unit. now it will not start, just turns over like it is not getting fire.
 
ok heres an update. checked compression on cylinder it is fine. no sign of a blown head gasket, checked plug it looks great, grounded plug wire but didnt see any spark. does anyone know how the shifter levers work to tell it it is neautral. wondering if the shift rods may not be in the right position.......
 
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