Home › Forum › Ask A Member › CD17 5.5Hp Compression question › Re: CD17 5.5Hp Compression question
Yes, go ahead and try the seafoam/engne tuner…It’s OK to let is soak for a few days. But, keep in mind this stuff is not a lubricant and could promote rust if left in there too long. The engine should be run hard in gear at WOT throttle for a few minutes after the treatment to be sure all of that stuff is expelled from the engine.
If there is still a 10PSI difference afterwards, I guess I wouldn’t worry much if the engine starts and idles reasonably well. I wouldn’t pull the head unless the engine doesn’t run well after the treatment. Keep in mind that there are many other causes of poor running besides uneven compression.
Should have mentioned this first. Be sure to mix the fuel/oil at 16:1 for this engine, the rods just have plain bushings that need the extra lubrication.