Thanks Grumpy. I have finally got this engine on my Viking base. I have some pics to go up in the appropriate section.
Thanks for your info. I got the carb cleaned but I didn't count the number of turns for this screw.
The engine idles now and then revs to a top speed of 3060rpm. There is no gradual increase in speed like the Briggs it replaced. It just jumps straight to full revs no matter how slowly you advance the throttle.
I will check all the specs and do an oil change once I the rain ceases and I get a chance to warm it up fully.