Mercury 150hp Optimax Cooling System
Just fishin' for some re-assurance.
I was out on my boat on Sat on the Thames. Launched and engine ran fine for 1.5hrs. Had lunch (engine was down) then set about to return home. After 20mins Smart Craft dials set off the alarm and a "overheat" was displayed on the tacho gauge. I checked the tell tail and it was not running. The exhaust or block did not feel excessively hot.
Got back to lauch site (let it cool down, run it, let it cool down, run it etc) without the engine gaurdian system cutting in and noticed something up the tell tail. I`ve now cleared this (general Thames cr*p) and I`m gonna arrange a day on a fresh reservoir to give it a proper flush.
AND THE QUESTION IS:
Is it likely that the non-running tell tail is enough to set off the alarm on the smart guages or does the problem lie deeper?
(Deeper = £150 for a mechanic to look at it)
Your thought are greatly appreciated!