[Kevin Battjes]

Thanks Tony. I’ll be pulling the riser while in storage and follow your plan. Very low clearance at the top of the riser so it may be a tight fit for the soft wrap. See attached.

The question about the injector would be why does only #6 cylinder get much hotter than the others measured on the head at the exhaust port where it bolts up to the manifold? Seems like it should be close to the other cylinder temperatures. Valve leak or injector?

[Kevin Battjes]

The boat is not equipped with boost or EGT gauges. Pretty much the factory set-up 2000 model year Tiara 3500 Express, engines built in 1999, just over 400 hours. The aftercoolers were serviced in early 2017 using the kits and following the method from Seaboard. Heat exchangers serviced at the same time. Both pressure tested to assure no leaks. Temps on the starboard side consistent around the 185-200 F under the conditions observed. Typical cruise speed is 2500-2600 RPM, for about 24-26 mph depending on load and sea conditions. I had been thinking the exhaust smell was from station wagon effect until it got stronger and more persistent. The boat is used strictly in fresh water.

[Author]

Replies