Yes, MerCruiser recommends that you remove the prop anytime the out drive is run out of the water.back to original question ,is it ok to run boat (with muffs) with no prop on
Yes, yes, yes. These are the best muffs you can buy For your MerCruiiser. The only place they don’t work, is when running wide open on a dyno. For that you need to feed water in both sides.
What concerns/worries me is that some of these people have posted good info in other threads. They have some high post counts so if someone was to come across this thread, they might actually believe this misinformation.Trust me muc, once these guys have their minds made up no amount of factual information is going to sway them.
I'm with you on this one, I have much experience in the field and can confirm all the facts you are posting. The problem with this forum is when one is pragmatic it increases the disinformation from others.....
yesback to original question ,is it ok to run boat (with muffs) with no prop on
Well, if op has been running in a trough for 50 minutes, his impeller should be cooked and overheating by now, right?What concerns/worries me is that some of these people have posted good info in other threads. They have some high post counts so if someone was to come across this thread, they might actually believe this misinformation.
I’m guessing they will lift water that high at least once, but I sure wouldn’t try it to many times.@muc, I will put $100 that says if you run that impeller dry, and try to draw water 2.4 meters, you will turn the impeller to a burnt little crisp long before water ever gets to it. look at my profile on linked in and look to see whom I am connected to at VolvoPenta/Merc/PCM/Cummins/John Deere/Cat/etc.
I can only go by what the lab testing results were and how they were communicated back to us
Brunswick even posts a few pages in their manuals on what happens to the impeller after 45 seconds of not being submerged when operating.
Ya know muc, you n dubs can have at it here. Better count on spending more time since this yokel will be off doing something else. Bye.What concerns/worries me is that some of these people have posted good info in other threads. They have some high post counts so if someone was to come across this thread, they might actually believe this misinformation.
AgreedWhat concerns/worries me is that some of these people have posted good info in other threads. They have some high post counts so if someone was to come across this thread, they might actually believe this misinformation.
I totally agree! Debate is good..Open minds are better..finality is rude!?Ya know muc, you n dubs can have at it here. Better count on spending more time since this yokel will be off doing something else. Bye.
Agree.I totally agree! Debate is good..Open minds are better..finality is rude!?
Ayuh,.... Sounds like a good move,....OP here,i am not against muffs at all ,my past experience ,which aint much, with muffs is that the muffs never sit on my lower outdrive correct ,gaps in the muff to outdrive letting water out and air in , water temp would fluctuate , and water exiting was weak flow and less volume ,and had to be monitored,but when i use tub ,when i start motor water is exiting almost imediately,with loose muffs i could take alot longer ,and constantly messing with muffs to get proper flow ,when i should be timing and tuning engine , i have listened to everyone opinion ,gonna go back to muffs ,the quicksilver ones,and not going to try and breakin on land will be breakin in next year,boats not ready for water yet ,and winter is closely approaching, I APPRECIATE ALL THE IN PUT ,didn't mean to start a feud on here ,just wanted to know if i can run out of water with no prop, that was really it. had boat 6 years (been working on it that long ),had boat out about 24 times, have turned to iboatsforum alot ,and i appreciate the high post people like ALLDODGE ,SCOTDANSFORTH, KEVIN STEPHENS, THE HAVE ALL HELPED WITH MY PROJECT ,so i usually listen to them ,especially the first 2 ,tho the second one is little gruff ,but has never steered me wrong thanx all on to my next issue with boat