Heat X
07-08-2008 | 07:02 PM
#12
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Joined: Feb 2007
Posts: 356
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From: CDA, ID
The "X dimension" is the vertical (not measured along the transom angle) distance between the driveshaft, and the bottom of the boat.
I use a flat or square yardstick taped to or held against the pad. Then, you can measure off the top of the yardstick with a framing square, to the tilt pins on the side of the gimble bracket. The tilt pins are located at the same height as the drive shaft.
It does help to level the yardstick, and check the framing square for vertical alignment.
Since I know mine is 19.25" measured this way, I thought you might want to measure yours "the easy way" along the transom from the bracket to the top of the notch. If your's measures 6 3/4"s, you're at the same height. Above (unlikely)or below that, would give you something else. Either way, you would have a known height to work from.
For instance, 19.25" is generally too high, and a 1" spacer usually results in much better slip %s with a 4 blade. If your "bracket to notch" measurement is more like 6"s to 5 3/4"s, you are lower by 3/4" to 1" and closer to what we have generally found to be a better performing XD on a Heat.
What Imco is asking you for is propshaft depth. Another practical way to determine gearcase and propeller depth. That is partly how they determine whether or not a nosecone, standard length Imco case, shorty, or spacer would help a specific boat.
What did they say?
Good luck and keep us posted with your progress.
Steve
I use a flat or square yardstick taped to or held against the pad. Then, you can measure off the top of the yardstick with a framing square, to the tilt pins on the side of the gimble bracket. The tilt pins are located at the same height as the drive shaft.
It does help to level the yardstick, and check the framing square for vertical alignment.
Since I know mine is 19.25" measured this way, I thought you might want to measure yours "the easy way" along the transom from the bracket to the top of the notch. If your's measures 6 3/4"s, you're at the same height. Above (unlikely)or below that, would give you something else. Either way, you would have a known height to work from.
For instance, 19.25" is generally too high, and a 1" spacer usually results in much better slip %s with a 4 blade. If your "bracket to notch" measurement is more like 6"s to 5 3/4"s, you are lower by 3/4" to 1" and closer to what we have generally found to be a better performing XD on a Heat.
What Imco is asking you for is propshaft depth. Another practical way to determine gearcase and propeller depth. That is partly how they determine whether or not a nosecone, standard length Imco case, shorty, or spacer would help a specific boat.
What did they say?
Good luck and keep us posted with your progress.
Steve
Steve,
Do you have the dimension from the bottom of your keel to the center of your prop shaft?
Thanx,
07-09-2008 | 03:07 PM
#16
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Joined: Feb 2007
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From: CDA, ID
07-09-2008 | 03:59 PM
#17
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Joined: Nov 2002
Posts: 2,621
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From: Nashvegas, TN
I see you said prop shaft, not driveshaft. I am out of town too.
Will measure that when I get back.
Steve
