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I keep forgetting that there are V6 Engines.

VP used the 4175, a spreadbore, to replace the Q-Jet

BRP markets the Oil now as Precision Blend. Beware though that there are a few Brands on the Market that claim to be Type C, but are not compatible with the Electric Shift. You have used new Washers on the Drain/Fill and Vent Screws, every time you replace them? They have been known to leak...

If an Uncupped Prop has a Cup added, then yes, the load on the Engine Increases. A 17" prop plus Cup is 17" plus cup(whatever it is). A new cupped Prop, might indeed be 17" cup included Depending on where the Cup is located, is also a factor. Cup on the Trailing Edge, affects Pitch, whilst Cup...

A lot of Props have Progressive Pitch Blades, and the Trailing Edge, will have the greatest Pitch

In the 70s we used to run WOT with the Prop leaving 6 inch troughs in the Sand Bars in order to get to the Shore at our Lake. Skeg and Prop Blades were worn, but the Water Pump and Impeller, looked fine when taken apart for Inspection and Impeller replacement. Water Pickup was in the Exhaust...

The Vacuum Pot can be removed and the Breaker Plate for the points/sensor fixed in place, however the Jeep distributor would be illegal on a boat, unless it was modified and certified to be USCG compliant

Perhaps they could Marinize an Automotive GM Odd-fire HEI Distributor for your needs

If the Springs are tired, the weights and pins are also likely worn, which all together affects the Rate of Advance as well as the Total Advance. The pricey One-off Marine Distributor with the correct Timing Curve might be the better choice

Unlikely. I suspect the Aftermarket will be focused mainly on the Chev SB and BB, along with some Ford engines.

Replacing those parts, isn't take the old one out/off, put the new one in. There are Shims in there to adjust the Gear Mesh, perhaps that wasn't checked

Two Weather Fronts, meeting.

Lots of SS Props and AL Props use the same Prop Nuts, so who knows....

Might have something to do with the SS prop having greater mass, and thus more inertia,

Increasing the ISO, iphones and other cell phones do it automatically(DSLR and Mirrorless can be configured for it), doesn't increase the sensor's sensitivity. All it does is amplify what the sensor sees, it also amplifies any noise the sensor is creating.

No Comment...

It take your eyes about 30 minutes to fully adapt to darkness, as for the the image sensor sensitivity, it is less sensitive than the human eye, but does have the advantage of being like a pool, it can let the Photons of Light accumulate over time, which the Eye can't

BRP Engine Cleaner or Mercury's Engine Tuner, are 2 of the better Ring unstickers in 2 strokes. CRC gdi ivd intake valve cleaner is also really good for that too. Place the piston high up in the cylinder to cover the Ports, and spray in a couple teaspoonfuls, and let it sit for a couple of days

??? There is a lot more to prop fit age than just the spline count Pics would be very helpful

On larger engines, almost all the timing advance is in before the carb is even cracked off of idle, and then once max advance has happened, does the carb start to open. However smaller engines(less than 20hp), might open the carb a bit sooner. On almost all 2 stroke outboards, idle speed is set...