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View Full Version : Transmission fluid gone bye bye


Bruce
07-22-2011, 02:52 PM
Haven't posted (or run my boat) in sometime. Went to clean it up for grandkids. Turned on bilge pump and out came pretty pink fluid! Tranny showed nothing on dip stick. I had run the engine to warm it up for about 15 minutes.(in the straps tranny not engaged.) don't know if it leaked out then or if it had been leaking for some time. I could not see anything obvious. I have a mechanic coming out when he can. Couple of questions: Is it likely a front seal since it had been sitting up? If so is this a pull engine etc deal. Which fluid is best Dextron or 15w40 oil?
Boat 1999 Maristar 230 VRS 5.7 Vortec
Trans. Hurth 1.1
Hate to hear repair estimate!

Thanks in advance.

east tx skier
07-22-2011, 03:00 PM
I don't think they were recommending 15W40 for 1:1. Stick with the latest Dexron/Mercon incarnation.

FrankSchwab
07-23-2011, 02:12 AM
If it's a '99 Maristar 230, then to the best of my knowledge you have a Hurth 1.5:1 V-Drive.

15w-40 or Dexron are both recommended; if you've been bothered by a rattle near idle, the 15w-40 should cure it. Otherwise, I might stick with Dexron to keep from mixing the two.

I'm guessing a problem with the transmission fluid cooler. There are a couple of rubber lines between the transmission and the cooler (it's inline with the water intake), and if something got into the boat while it was stored (like, a rat or squirrel) it's entirely possible they chewed on or through the line. Run the engine, the transmission cooler pressurizes, and the fluid comes out the hole.

But, that's just a guess.

/frank

Bruce
08-06-2011, 01:06 AM
Thanks Frank. It is is a 1.1 Hurth . Going to take it out of water this weekend. Tranny is totally dry. I picked up a couple of quarts of Dex/mercon that I am going to put in in hopes I can power it up on the trailer.

mtajpa
08-06-2011, 01:49 AM
If it's a '99 Maristar 230, then to the best of my knowledge you have a Hurth 1.5:1 V-Drive.

15w-40 or Dexron are both recommended; if you've been bothered by a rattle near idle, the 15w-40 should cure it. Otherwise, I might stick with Dexron to keep from mixing the two.

I'm guessing a problem with the transmission fluid cooler. There are a couple of rubber lines between the transmission and the cooler (it's inline with the water intake), and if something got into the boat while it was stored (like, a rat or squirrel) it's entirely possible they chewed on or through the line. Run the engine, the transmission cooler pressurizes, and the fluid comes out the hole.

But, that's just a guess.

/frank

Not trying to thread jack but this is a picture of the nameplate of my Hurth and it appears that the ratio is 1.56-1.57 so would this actually be a 1:1 ? Also attached is a brochure for the hurth hsw 630 v1 and I don't see an option for a 1.56-1. Just looking for a little more info from others.

FrankSchwab
08-06-2011, 02:20 AM
Interesting.

The Sales Brochure for '98 and '00 list a '1.5:1' transmission; '99 lists a '1.46:1'. Yours sure looks like a 1.56:1.

What a confusing world we live in.

MTajpa - Send me an email; I've got something you might like.

/frank

bigmac
08-06-2011, 11:22 AM
The option to use 15W40 in the transmission was only sanctioned for Hurth gear-reduction transmissions models 450A or 630A (both inline) or the 630V (V-drive).

Attached is a .pdf of the Indmar Service Advisory on the subject.

mtajpa
08-06-2011, 11:33 AM
From the picture of the nameplate can you explain how mine would be a Gear Reduction with the A and B ratios 1.56-1.57?

bigmac
08-06-2011, 12:07 PM
From the picture of the nameplate can you explain how mine would be a Gear Reduction with the A and B ratios 1.56-1.57?

Input shaft rotation 1.56 - 1.57 turns for 1 rotation of the output shaft. A and B simply refers to direction of rotation. Ratios are the same either direction.

mtajpa
08-06-2011, 12:12 PM
Thanks bigmac. End of thread jack!