Your video was very helpful when I reinstalled my Mercury lower after water pump impeller replacement. Verified the gears were in forward upon reassembly
Came across your video while searching if anyone out there has converted a Yamaha F90 to left-hand rotation. Unfortunately only F115+ are available both left hand and right hand from Yamaha. So far it looks like the 115 lower unit is only the same as 90 in dimensions only but the inner workings have different size shafts etc. Too bad. My 25’ Walk-Around has twin counter-rotating 225hp Yamaha’s while my 22’ has twin F70’s and in the future I would like to re-power with F90 SHO’s. Would really like to achieve counter-rotating outboards without going all the way up to a combined 230hp using twin F115’s. Extremely unnecessary when the F70’s have performed exceptionally well for over 10 years pushing the boat just fine.
Hi Quepasa, it’s a bit complex, it would have to be a prop with too large pitch pushing a heavy boat with a performance curve of low RPM’s on the hi-end throttle travel. Let’s say you install a 90 HP on a 21 ft boat with a propeller pitch so large that your max RPM’s are 3800, the over laboring on this motor would be tremendous. Yes, it could overheat. Now, if you have that same motor install on a 25 Ft boat but you arrange your pitch and diameter to obtain 6,000 rpms, that motor would be on its right performance curve not laboring or overheating. Whichever the load you’re pushing is not the issue, it's to find the right pitch and diameter to obtain the max RPM at wide open throttle. Hope this helps. Thank you for watching . Take care.
Yes, but keep in mind if your configuration was, both propeller rotating away from each other, and now once you swap the lower units they will be rotating towards each other, the handling of the boat at low speeds will be different, less effective, specially when docking, but yes the swap can be done. Thank you for watching and participating. Take care Danny. 👍🏻
should you have time, please talk about right hand turn impeller, its pitch and stator angle. size of impeller as to size of nozzle. lets say, 390 horse power diesel engine. i like to fabricate my own waterjet like Hamilton or doen. thank you sir.
Hi Jojinapigkit, never been much of a fan of jet drives, I took some technical seminars when younger, but not enough to engage into advising anyone. But thank you for your question and for watching. Take care 👍🏻
You’re absolutely right, propellers is a very lengthy and complex subject, I'll be working on that. Thank you so much for watching and for your suggestion to a new video.
Your video was very helpful when I reinstalled my Mercury lower after water pump impeller replacement. Verified the gears were in forward upon reassembly
Hi John, I’m glad it helped you, Thank you so much for watching. Take care
Very useful trick. Keep up the great videos!
Thank you Justin, glad to help and thank you so much for watching.👍🏻
Came across your video while searching if anyone out there has converted a Yamaha F90 to left-hand rotation. Unfortunately only F115+ are available both left hand and right hand from Yamaha. So far it looks like the 115 lower unit is only the same as 90 in dimensions only but the inner workings have different size shafts etc. Too bad. My 25’ Walk-Around has twin counter-rotating 225hp Yamaha’s while my 22’ has twin F70’s and in the future I would like to re-power with F90 SHO’s. Would really like to achieve counter-rotating outboards without going all the way up to a combined 230hp using twin F115’s. Extremely unnecessary when the F70’s have performed exceptionally well for over 10 years pushing the boat just fine.
Buena explicación gracias por sus videos
Gracias por tus comentarios, son muy apreciados.👍🏻
Is this test reliable on mercury lower units as well?
Awesome video very good explanation 👌 I'm from the group sanbaleros from miguel te busco
Excelente, hay que dar gracias a Miguel te busco y a su canal por invertir su valioso tiempo ayudando a la comunidad marina. Saludos Miguel
super helpful!!! thank you!
Thank you my friend, your feed back and support really helps. 👍🏻 You may want to check my tutorials on my web site. us4marinerepair.com Take care.
Can you have a motor over head if a prop is out of pitch ?
Hi Quepasa, it’s a bit complex, it would have to be a prop with too large pitch pushing a heavy boat with a performance curve of low RPM’s on the hi-end throttle travel. Let’s say you install a 90 HP on a 21 ft boat with a propeller pitch so large that your max RPM’s are 3800, the over laboring on this motor would be tremendous. Yes, it could overheat. Now, if you have that same motor install on a 25 Ft boat but you arrange your pitch and diameter to obtain 6,000 rpms, that motor would be on its right performance curve not laboring or overheating. Whichever the load you’re pushing is not the issue, it's to find the right pitch and diameter to obtain the max RPM at wide open throttle. Hope this helps.
Thank you for watching .
Take care.
i have a question , can you change left handed lower unit to a right handed lower unit?? will it work?? of a yamaha v6 200hp 2 stroke??
Yes, but keep in mind if your configuration was, both propeller rotating away from each other, and now once you swap the lower units they will be rotating towards each other, the handling of the boat at low speeds will be different, less effective, specially when docking, but yes the swap can be done. Thank you for watching and participating. Take care Danny. 👍🏻
Great video thanks for the easy verification
Thank you Gio for watching, your opinion matters. 👍🏻
nice one, now I know. thank you sir. I appreciate it.
Glad to help
Great channel, thanks for sharing.
Hi Ezra, thank you so much for watching, your comment is highly appreciated. 🙏
Thank you very much ❤
You're more than welcome sir, glad if you could take something out of these videos. Take care 👍🏻👍🏻
Nice tips
Thank you Eric for watching. Your opinion counts.
Ive always wondered if it was the left one or the right one i always confuse them🤔
Thank you buddy, I’m really glad you learned it now. Thank you for watching. 👍🏻
should you have time, please talk about right hand turn impeller, its pitch and stator angle. size of impeller as to size of nozzle. lets say, 390 horse power diesel engine. i like to fabricate my own waterjet like Hamilton or doen. thank you sir.
Hi Jojinapigkit, never been much of a fan of jet drives, I took some technical seminars when younger, but not enough to engage into advising anyone. But thank you for your question and for watching. Take care 👍🏻
Thanks!!!!
You bet! 👍🏻
There's a lot more to talk about propellers like different materials used and sizes,pitches,hubs,etc
You’re absolutely right, propellers is a very lengthy and complex subject, I'll be working on that. Thank you so much for watching and for your suggestion to a new video.
😊😊😊
Si puedes hacer esto video en español para tu seguidores de PR 🇵🇷
Hola Rene, gracias por la sugerencia, es una buena idea. Trabajare en eso. Gracias.👍🏻