Here's the saga from the beginning....
We recently purchased the '81 360 Express knowing and deal compensating for the cost to be incurred to replace the port engine. Plans were to wait until post season and rebuild / replace the engine.
Well, I ran across a really good deal on a donor boat with an almost new 454 I/O setup. The mechanic I have used for years made a mistake when checking rotation of the engine. Seems that it's pretty standard for newer models to handle the rotation in the gear box vs. the older technology of counter rotation engines. I have no clue as this is my first rodeo with twin screws. Needless to say, learning a lot REALLY fast.
Since the bell housings and starters were different due to the I/O vs. direct drive inboards, these parts along with the transmission were used from my original setup.
After roughly $6,000 for engine and labor to make the exchange, the marina swapping the engines can't seem to get the engine started. Appears the starter from my old engine is spinning the engine the wrong direction, and therefore reversing the intake and exhaust functions.
The suggestion was made to install the opposite rotation starter and rh prop to counter the rotation. I am not particularly fond of this suggestion as I am assuming there would be a torque and therefore list issue as throttle is increased with both standard rotating props.
Another suggestion was to switch out the gearbox for counter rotation. This seemed feasible and most likely the least costly way to get the proper rotation.
Other than that, the mechanic that originally checked the engine and errored on rotation will rebuild the original motor over the next couple of months and we will swap out for the motor that now sits in the boat.
Suggestions / recommendations?
We recently purchased the '81 360 Express knowing and deal compensating for the cost to be incurred to replace the port engine. Plans were to wait until post season and rebuild / replace the engine.
Well, I ran across a really good deal on a donor boat with an almost new 454 I/O setup. The mechanic I have used for years made a mistake when checking rotation of the engine. Seems that it's pretty standard for newer models to handle the rotation in the gear box vs. the older technology of counter rotation engines. I have no clue as this is my first rodeo with twin screws. Needless to say, learning a lot REALLY fast.
Since the bell housings and starters were different due to the I/O vs. direct drive inboards, these parts along with the transmission were used from my original setup.
After roughly $6,000 for engine and labor to make the exchange, the marina swapping the engines can't seem to get the engine started. Appears the starter from my old engine is spinning the engine the wrong direction, and therefore reversing the intake and exhaust functions.
The suggestion was made to install the opposite rotation starter and rh prop to counter the rotation. I am not particularly fond of this suggestion as I am assuming there would be a torque and therefore list issue as throttle is increased with both standard rotating props.
Another suggestion was to switch out the gearbox for counter rotation. This seemed feasible and most likely the least costly way to get the proper rotation.
Other than that, the mechanic that originally checked the engine and errored on rotation will rebuild the original motor over the next couple of months and we will swap out for the motor that now sits in the boat.
Suggestions / recommendations?