DaveW
Active Member
Hi there
Here's my dilema, I've got an XTB-21 running a 200Xri Merc. I'm turning a 22" Lightning ET to 7100rpm and getting around 74mph or so out of her. I have a CLE case with a fat shaft.
I don't know what gear ratio is in the the box, but I have just blown it up and looks like I'll be needing a new gearcase.
I've picked through all the XTB owners details on the Ally owners site, and feel I was missing out on speed.
The numbers on there vary from low of 72mph with a 22" Tempest on a TM case (200 Mariner @5850) to a high of 86 on a 200 ProMax with a TM case spinning 6750rpm. There are also quite a few over 80 running either CLE's, coned boxes or SM's.
My questions are: What do you think the ratio was in the box I blew, and what should it ideally be. Keep in mind I'll need some prop recommendations too.
Of all the props being run on other XTB's and 200hp motors there is only one 22" (the Tempest). The majority are 26" Trophys, 27" Tempest, a 26" Chopper, a 28" Chopper 2, and a 27RX.
Can you understand my confusion?
Thanks in advance from Australia!
Here's my dilema, I've got an XTB-21 running a 200Xri Merc. I'm turning a 22" Lightning ET to 7100rpm and getting around 74mph or so out of her. I have a CLE case with a fat shaft.
I don't know what gear ratio is in the the box, but I have just blown it up and looks like I'll be needing a new gearcase.
I've picked through all the XTB owners details on the Ally owners site, and feel I was missing out on speed.
The numbers on there vary from low of 72mph with a 22" Tempest on a TM case (200 Mariner @5850) to a high of 86 on a 200 ProMax with a TM case spinning 6750rpm. There are also quite a few over 80 running either CLE's, coned boxes or SM's.
My questions are: What do you think the ratio was in the box I blew, and what should it ideally be. Keep in mind I'll need some prop recommendations too.
Of all the props being run on other XTB's and 200hp motors there is only one 22" (the Tempest). The majority are 26" Trophys, 27" Tempest, a 26" Chopper, a 28" Chopper 2, and a 27RX.
Can you understand my confusion?
Thanks in advance from Australia!