I believe it is vapor lock. I had a '95 190 Horizon with that engine. On a very rare occasion I had a little vapor lock. If possible, keep the engine idling to help cool it down, but don't run it if you have people in the water. If possible, keep the engine blower fan running. If, possible, open the engine compartment to let it ventilate. When the engine is worked (like pulling tubes for a while) the water temp should stay within normal range, but the oil temp does come up. There is no oil temp gauge, so no way of knowing, but you will probably notice lower oil pressure at idle when it is hot. When the engine is shut down that engine heat warms up the engine compartment and fuel lines. When restarting, you will probably notice the water temp rise well above normal for a minute or so. Hope this helps.
_________________ Surface Interval: A scuba diving term for that time between dives to relax and prepare for life's next great adventure.
Current boat: '02 FW 268 Vista Previous boat: '95 FW 190 Horizon
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