Chevy small blocks are easy to take apart & repair but you have to know what you’re starting with. Might want to line up a machine shop to check out the heads if you do wind up taking it apart based on testing
You can also find used GM cast iron intakes on eBay, I picked one for my old 4.3 because I thought it would have rusted through by now but it’s still good! I do check it every year.
You might want to investigate further there are many causes of low compression. Could be valves not seating due to leaks from the manifold to elbow gasket, or worn rings. To further investigate leaky head gaskets replace the stat housing to ex manifolds hose with clear hose. Run the boat in the...
I have a 2 speed for my ‘88 Four Winns that is about 4,000 lbs. makes it much easier but I have a roller trailer which is easier still than a bunk. My brothers boat is about the same size on a bunk and it’s much harder to winch even with the 2 speed
It all makes you wonder what would have been if BRP came out with a 4 stroke outboard for the Evinrude line back when Yamaha & Mercury were changing over…
I don’t think the 2 sets of gears are necessarily a problem because what causes problems with that set up in I/Os is the bellows and lack of maintenance & need to pull the drive each season. The other potential advantage is the horizontal crankshaft design is likely to have much less thrust...
Not sure what Merc did when the Vortec V6 came out (they used that dreadful one piece system) but I know that V/P changed the shape of the alu down pipes to a sharper angle and installed one way check valves in the elbows to break the vacuum formed in the exhaust...they let air in under vacuum...
https://www.manitoupontoonboats.com/us/en/discover-manitou/advantages/rotax.html
Interesting, it is a low profile outboard with a horizontal crankshaft design, appears to be a DI 2 stroke.
They are still selling carbs with that set up!
Even for marine use....
https://www.holley.com/products/fuel_systems/carburetors/marine_carburetors/parts/M-600
https://www.holley.com/products/fuel_systems/carburetors/marine_carburetors/parts/M-650...
I think Sea Way marine bought up a bunch of OMC stuff after the bankruptcy. NLA marine appears to get stuff from boats parted out in fresh water regions.
I think you have a parasitic draw in that a module is not going to sleep as it should. Even if you leave the battery switch on it should not go dead in a week’s time. I would take it to the dealer while it’s still under warrantee to investigate this. The auto bilge function should be directly...
NLA parts are not going to be found from most suppliers like Sierra et al, you need sources that dismantle old boats/engines and sell off what is still usable.
I used the same stuff on my cast iron exhaust manifolds and it holds up well. Boat sits outside in cool damp winters and on a salt water mooring in summer…
