Hey guys, did new risers and manifolds and new circ pumps this year. Checked impellers and both were in good condition - still full vanes and no set. My twins both have always run about 165-168. I replaced the plugs with the factory spec champion plugs which were the same plugs I pulled out. The spec gap is 1.1 mm or .045. The old plugs on the port side were gapped about .035 and the stbd side was about .04. So I installed the new plugs and fired it up. Seems to run great. So, we took her out for the maiden voyage and she ran fine except she was running just shy of 175 both on plane and at idle. Three questions:
1. Is it time for new t-stats? It has been about three years and I boat in brackish water.
2. Is it possible that the plugs gapped correctly are causing the engines to run hotter? Before the plug change the engines were at their usual 165-168 in the slip. Do I need to be concerned? Should I pull them back out and back down the gap slightly?
3. If I replace the t-stats, what temp should I put in?
1. Is it time for new t-stats? It has been about three years and I boat in brackish water.
2. Is it possible that the plugs gapped correctly are causing the engines to run hotter? Before the plug change the engines were at their usual 165-168 in the slip. Do I need to be concerned? Should I pull them back out and back down the gap slightly?
3. If I replace the t-stats, what temp should I put in?