Just got the rebuilt V1902 installed, it had thump in the engine back through the filter, so I had to adjust the valves before it would run right, they had not tighten the lock nut down tight enough when they rebuilt it and the lock nuts back off. It seams like it does not have the power the old v1702. Is there 1902's that have less hp, this engine has 1861cc stamp side of block? It runs good and does not smoke it just bogs down some not terrible it is noticeable. Thanks br