CONTINUOUSWAVE

Yes--the Pencil Coil on cylinder-2 was failing. I have heard the same about their service life from Verado owners. I am going to throw a spare in my emergency kit.

Jimh--Thanks for the help.

Well I feel dumb. [The engine spark] coil on cylinder 2 was defective. [With a] new spark coil pack [the 2011 Mercury 90 FOURSTROKE engine could accelerate at full throttle to] 6,000-RPM. The boat speed was 38-MPH. This test was with a propeller [of unknown material and unknown number of blades] of ...

Thanks Phil T. I was hoping someone else had information on this particular combination.

I am taking the boat to my mechanic who is a Mercury dealer and supposedly has experience with the same hull and engine combination. I will see if he can source one of those propellers.

Chris

I should have clarified: the full-throttle engine speed was similar with the full passenger load albeit maybe very slightly reduced. The boat speed was down but not as much as I was expecting. I think I recall hitting about 26-MPH with the full load when I tested briefly. My main observation was jus...

Thank you Jim. I’ll try all of the above. Currently the engine is mounted one hole up. And the splash plate above the anti-venitalation plate is visible. The anti-ventilation plate is not visible while on plane. Also, the hull does very strongly list to port if any weight is out to that side of the ...

Hi Jim. I’ll convert over my measurements to mph. Just was reporting what my Simrad displays by default. The engine has a WOT engine rpm range of 5000-6000. The gear ratio is 2.33 I attached a camera to the transom yesterday to observe the ventilation plate while trimmed and planing under multiple s...

Wow thank you for the extensive reply Jim. Very much appreciated. I tested a couple more propeller, and I agree with what you are saying here. I am leaning towards the engine being mounted too low. The hull is very clean and have not seen any signs that it is waterlogged. Apologies actually hadn't n...

I have a 1988 Montauk 17 that has a 2011 Mercury 90 FOURSTROKE engine. The boat is very clean. The engine only has 250 hours. The hull floats with the [engine splash well] drains just at or above the water line with no one onboard. The engine is mounted one-hole-up. The current propeller is an alumi...