1998 GT-40 and 1.23:1 For Sale

8122pbrainard wrote: Larry, I assumed that the Supra had a LH prop so I was curious what happened if anything with the RH. Maybe Morgan will be back and comment?

My crystal ball and a look at the Supra website tells me that Morgan had an 89 with a 1.23 to 1 transmission so he swapped a normal rotation engine for a normal rotation engine and saw no handling differences.

On the other hand, one of the boats in our family is an 88 Supra Mariah that was born a lefty, died we bought it and it was reincarnated as a righty since I had a righty engine hanging around.

Later after rebuilding the original engine it became a lefty again

Since I figure you're fishing around for handling differences Pete, it handled different in reverse and it turned easier in one direction than the other going forward depending on which engine was in it as you would expect in both cases.

Being a big, wide boat there were no noticeable listing issues with either rotation engine. Mostly because it's not a skinny short 70's CC.

The wake was slightly more symmetrical as a lefty (kinda' a subjective opinion, there wasn't much difference at all)

It accelerated better and was faster as a lefty but that might have been due to an extra 50 or so HP after the rebuild

By the way, Supra's started out with LH props, went to RH props for a short time with the 1.23 to 1 transmission, then back to LH props and 1 to 1 transmissions when they switched to Indmar power after a change in ownership

Maybe some Supra guy from the right years will be interested

I believe the 1:1 supras turned LH props. I am guessing that they did not compensate for prop rotation in the hull shape since they switched prop direction in the middle of the TS6M production run.

8122pbrainard wrote: stepper459 wrote: . I did a GT-40 swap on my old Supra, it was easy and well worth the time. Morgan, Did the opposite prop rotation do anything to the Supra handling?

Pete, maybe you know, but it isnt stated here what year the supra was. My 89 had the same drive train as an 89 Nautique. Left turning engine, 1.23:1 reversing transmission. I can only assume supra had the rr rotation and 1:1 before that, hence, same set up as Nautique and no handling issues.

I think most of if not at least some of the other inboard ski boats have Left turning props. Not an issue, is it?

Not sure I understand your question.

Must run real good.

1998 Ford 351 GT-40 Multiport Fuel Injection engine for sale with 40A 1.23:1 transmission. 100 amp alternator.
1425 hours on engine,. 300 on transmission. Engine is in a 1998 Ski Nautique. Runs perfect.
Asking $4500.00 for the package, or $4000.00 for the engine and $1000.00 for the transmission separately.

Serious inquires, please.
Thank you!
Jim