Here is my launch & retrieval process...

I back down the ramp until the stern just starts to float off the trailer. I then let the winch out a bit, which brings the bow down and stern up. Nose is still resting on the which stand at this point and the winch strap is still connected to the eye hook just in case I need a quick retrieval for a mechanical issue or something else. Even though the stern is now floating the forward section of the hull is still resting on the trailer bunks so I'm still centered on the trailer. I then climb aboard and check that the exhaust has clearance at the stern. Once clear I turn the engines over and go to the stern again to check I have good water flow coming out the exhaust. I let the engines run to about 130 degrees and then the wife unclips the winch strap from the eye hook and I power off the trailer. Wife then parks truck and trailer.

Retrieval is pretty much the same process just in reverse. I back the trailer down until the fenders go just below the water. I have discovered this is the sweet spot for me at the ramp I normally use as well as a few others. I then SLOWLY power my way onto the trailer. The bunks usually stop me just short of the nose coming to rest on winch stand roller. I then give it a little power to put the nose on the roller which also centers the hull on the bunks. I then shut the motor off immediately after coming back to neutral. I then use the winch to crank her up the rest of the way. I connect my safety chain and haul her out the water to my wash and flush down area.

Launching is a longer process since I let the engines warm up to make sure the temp is climbing at the same rate per motor. From the time I back the trailer down to when its coming out of the water I'm talking a matter of minutes, may 2-3. Have had several people comment at the ramp on how quick and effortless we make it look, but we do it every weekend so we got our system down. I'm sure the boat and trailer setup have something to do with it as well. We are usually unloaded, flushed, and washed down within 45mins of the boat coming out of the water. Just like anything practice and repetition makes perfect.

Dup

Splitdecision271,

I appreciate you sharing your process. I back down until my fenders are in the water, start the engines, unhook the bow, then motor off the trailer. Loading on, I motor up the trailer until I am in contact with the bow roller. I leave the engines run for a minute till hooked and then shut down.

This worked well for me on previous boats, however, with the Formula, I notice the tips of the silent thunder are partially in the water upon launch and load-up, which alarms me. Maybe I need to pay out some winch line and see if she levels out more - similar to how you say you do it for launching, but I am uncertain what to do for loading. It is not practical to try and winch the girl up the trailer.

I have come to find that there are quite a few threads on internal flappers.

CP Performance has one that goes in-line before the exhaust tip: http://www.cpperformance.com/p-22464...ess-steel.aspx
Hardin Marine has: http://www.hardin-marine.com/p-12578...-flappers.aspx
Marine Industries West has: http://www.marineindustrieswest.com/...6-5f71d854bbf7

I am actually thinking about adding some to my boat, so as of right now, I do not have any suggestions although the Marine Industries West seems pretty good.

I kept the internal flappers and added external flappers also. After spending the money rebuilding motos I didn't want to ingest any water. No loss of sound or performance, just peace of mind!!!

Any other thoughts from anyone else?

Your risers off your exhaust should be at a downward angle to also prevent reversion. My silent thunder is removed but I have external flappers and baffles in my mufflers. Even with bigger cams than a Magnum motor I never worry about reversion when launching. I think you guys are overdoing it a bit with your launching concerns. I did have a friend with a Pachanga that had reversion, but it was because his risers were too short, nothing to do with launching.

Just launch at a good reasonable speed and go boating.

This topic is not just about reversion - it includes water ingestion.

And I am guessing you never had a motor ruined that you just got done spending way too much time and money on because of water......

I am not an expert by any stretch

Back in the day we had a "roller" type trailer. I would back to almost the fenders hitting the water and slam on the breaks-- the boat rolled of without issue. However, fast forward to today - we have thru hull exhaust- silent choice-- Now I VERY SLOWLY back the boat up into the water -- Obscenely slow - till it floats off the trailer- start it up and SLOWLY back up -- never in a hurry. I've never had any issue with reversion - but reading some of these discussion - I want to be as conservative as they come!! I hate doing boat repair!!

3pointstar

You scare me!!!!