Hi Guys,
I have the following setup here in OZ.
Hull : Fibreglass shallow 5deg V hull, 8ft x 4ft beam . hull weight 55lb (25kg)
Motor: 2010 5hp Mercury, 2 stroke, 6.2ci. (102 cc), 44lbs (20kg), 6000rpm ,8.9:1 CR, 115 PSI comp. cold, 55 bore x 43 stroke.
Total mass: 280lbs (including me)
Prop: Black Max 8 3/8” x 9”
Top Speed: 25mph (yes it does plane!)
Other mods include motor jacked 1.5”
Now I want more power out of the single cyl merc , I don’t want to upgrade as I love the portability and internal fuel tank (also no rego required in OZ). There is no boat ramp near me so I have to lift everything into the water.
I would like to start with the compression raised to 155psi.
I will run it on PULP or E10 (95 octane here in OZ) and 50:1 fuel oil.
Note: Manual say 10% Ethanol is OK to use ?
I will also look at getting the prop repitched and cupped to 11” (some testing required with tiny tach)
After this I am stuck on what to do next. I would like to keep it reliable as I use it to run 2-3miles up the river to get to my fishing spot FAST!
What about carb jets, porting, reed valves (carbon?), timing(advance) , exhaust tuner .
Any help would be greatly appreciated.
Cheers
microbream
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