Repowering reminds me of the old joke about the man who was banging his head
against a brick wall.
When asked why he replied "It feels so good when I stop."
Seriously though, When I repowered Boracay with a John Deere 4045D I did spend a considerable amount of time checking measurements.
Overall size, engine and gear
controls, spacing and location of engine mounts, and the size of the flexible coupling all deserve special attention.
Particularly check the location and size of the exhaust
hose. Specifications are not particularly forthcoming about this and it can be a real surprise.
Check also that Volvo
have not changed from rear engine mounts to gearbox
mounts, and if they have what adapters are needed.
I ordered an extension for the wiring
harness and this was well worth the money
I needed to have adapters made up for the engine mounts, the gearbox
/flexible coupling/propeller shaft coupling and the exhaust.
I went with new engine/gearbox mounts and feel this was worth the money
For the propeller
you can calculate from your current
boat speed (GPS) and propeller
shaft revolutions what your current
size should be.
Then calculate what size propeller will be needed. I ended up with a prop that is way too coarse and will need to repitch by up to 4 inches when I next slip.