|06-23-2019 11:23 AM|
Thanks for the replies. My experience with the 4 blade spitfire is that the all around performance isn't as good as the Tempest but I can see using it for hauling the ridiculously heavy loads that I carry when going out for a weeks camping trip with 2-3 guys.
The hole shot is better but the Tempest isn't bad until you put a huge amount of weight in the boat. I could run about 1.5 mph slower and still stay on plane, which is an improvement but isn't enough of a difference in my mind to justify a switch. I couldn't trim out as far with the spitfire and still stay hooked up which surprised me after what I had read here(motor is in the third hole). The top speed/rpm difference just doesn't matter to me but I lost 1.5 mph at 4000 rpm. The motor would make a whining noise if I backed off of the throttle too fast while decelerating with the spitfire, not sure what would cause that. There was no prop rattle with the spitfire though, that was nice. I'll probably run both props thru the summer to get a better feel for the differences but as of now I think I like the performance of the Tempest better.
|06-23-2019 10:31 AM|
|Lmbkiller||I have a 7.5 and 4.5 both mercs both have 2 blade props both power small aluminum fishing boats that catch plenty of fish|
|06-23-2019 08:22 AM|
|06-23-2019 03:33 AM|
Just be aware that for many folks, they find that they lose reverse performance when switching from a 3 blade to a 4 blade prop.
If you only reverse when docking it will be manageable, but if you do a bunch of back trolling you may find that you will like a 3 or 2 blade prop better than a 3 or 4 blade prop.
|06-20-2019 10:15 AM|
You want to run any propeller as high as you can to reduce motor drag, it's just 4 blades are generally able to run higher than a 3 blade.
|06-20-2019 04:04 AM|
|06-19-2019 10:40 PM|
I have a very small amount of rattle almost not noticeable,
Worth a try if you aren't already at 140 or so.
I have a new 200 Merc.
I'm wanting to try the 4 blade aluminum spitfire just to see how it performs......
|06-16-2019 07:13 PM|
|2catch1||I tried a few on my princecraft deck boat and 150 merc (same as yours). I love my 4 blade turning point propeller. It is aluminum as I run a rocky river all the time. They are cheap and it performs well.|
|06-10-2019 09:40 AM|
I had DAH rework my Rev 4 so the gap is closer. The only downside is that both props are at the top of the RPM range and I'd like to raise the motor up so I almost need to go up probably 2 sizes on both theoretically.
|06-09-2019 06:28 AM|
I also have a different boat, but loved testing props and changing to a 4 blade. It honestly changed my whole boat. I went from a 19 tempest to a 19 Trophy Plus. I got all the advantages you are looking for and I only lost 1 mph on the top end.
Great tip I got on here, when you are trying to dial in your RPM's, start with all solid vent plugs and drill them out yourself. I was amazed at the precision. My motor is max 5800 rpms. I can get it right at 5760 each time I try to max it out again. I have no doubt I could get to 5800 on the number, but did not want to push it or hit the rev limiter.
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