93 15hp lu and impeller

i just bought a 15hp, mercury, #od001912
i believe 1993 off craigslist. the condition is pretty good, but was seized from being in storage for 6 years.
brought it home, pulled the plugs, and sprayed lube overnight. today it turned beautifully! thanks guys!
compression is 150 on top, 144 on the lower. i have spark.
question, plug gap? looks really big, like .90 or so. is this right?
i wanted to pull the lower uint, but it seems that i dont have any metric tools, so ill have to wait. need to buy a 100 wrench (isnt this a american motor???) it looks like there is only three bolts holding the lu? two on the bottom, and only one on top? is that it??
i have rebuilt three older evinrudes thanks to this post. you guys rock!!

the motor:






the other three

Re: 93 15hp lu and impeller

Gent's I need your help!!! I have 100HP 1991 4 cylinder Mariner that does not pee. I have pulled out the thermostat and replaced the impeller and still no pee. I even pulled out the pop-it valve and ran it with out it. Still no pee. The motor runs cool on the muffs and idles all day without getting hot, but no pee ever comes out. I did get it to pee out the little hole in the pop-it valve, thermostat cover when they were not in, but the cover was on. So what gives????

Re: 93 15hp lu and impeller

sparck gap 0.060 in (1.52) mm