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Author Topic:   Montauk list to port
Barnett Childress posted 07-25-2001 08:59 AM ET (US)   Profile for Barnett Childress   Send Email to Barnett Childress  
Hi all,
I would like to hear from other Montauk owners out there. Do any of your boats have a list to port when at high RPM's?

I replaced the original Black Max aluminum 12.75"x21" pitch prop with a Merc SS Vengeance 13.12" x16" pitch at Whalers recomendation because I was only able to get 42-4300RPM @WOT with my Merc 90HP 4 stroke.
Now @WOT I'm getting 55-5600RPM and 43-44MPH just like the numbers Whaler got with the Montauk/Merc 90 4S/Vengeance combo.

However I have a pretty pronounced list to port when I get to 3/4 throttle and up. I noticed this for the first time running the new prop but it was also the first time I was alone in the boat. Usually I have a passenger with me seated starboard on the RPS. I tried shifting my weight a bit starboard but it didn't help much & triming the engine only adjusts the bow attitude up/down. Steering is straight but very hard to port. Is the list I'm experiencing due to prop torque?

One other thing, I did install a transducer on the starboard side of the transom (specified by the manufacturer) but the unit only protrudes 1/16" or less below the hull & there is no rooster tail from it at all.

Transducer is on a kick up bracket so I'm going to tilt it out of the water and try that first but I don't think thats the problem. One other thing, weight is evenly distributed & boat sits level in the water side to side at rest.

If in fact it is prop torque would the self adjusting trim tabs being discussed in another post correct a listing problem?
Appreciate any help/advice!
Thanks,
Barnett

Tom W Clark posted 07-25-2001 10:24 AM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
Barnett,

A list to port is pretty common. Propeller torque is the probably the main culprit but other factors may be contributing.

You said "Steering is straight but very hard to port." Does this mean that it's pulling to starboard? If so, you need to adjust your water rudder or steering trim tab so the wheel will be neutral when the motor is at its normal trim angle.

As you trim the motor out there should be an increase in the list to port as P-factor comes into play.

The transducer may well be affecting trim. Your idea for testing the ride without it down is a good one and should tell you whether it is or not.

For more on this see: http://continuouswave.com/ubb/Forum4/HTML/000351.html

Barnett Childress posted 07-25-2001 10:58 AM ET (US)     Profile for Barnett Childress  Send Email to Barnett Childress     
Tom,
Thanks for the reply. No pulling. Just noticed that steering effort is harder to port than starboard.
Barnett
Tom W Clark posted 07-25-2001 11:04 AM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
Barnett,

You don't, by chance, have NFB steering do you? If you do then there may be a maladjustment of the water rudder and you won't be able to feel it.

As a test, try moving the trailing edge of your water rudder to starboard and see if this makes a difference in the list.

Barnett Childress posted 07-25-2001 11:40 AM ET (US)     Profile for Barnett Childress  Send Email to Barnett Childress     
Tom,
Boat came from Whaler rigged with with Teleflex NFB steering. I'll try that.
Thanks,
Barnett
andygere posted 07-25-2001 01:01 PM ET (US)     Profile for andygere  Send Email to andygere     
I installed a transducer on the port side of my Montauk, with the bottom of it just flush with the bottom of the sponson. I have not experienced any trim problems associated with this. I do find that the boat is somewhat sensative to unbalanced loading. I have twin 12 gallon steel tempo tanks, and I also have a 15 hp kicker mounted on the starboard side of the transom on a bracket. This weekend, I made the mistake of running off the port tank first, and for the second day of boating (with a full starboard tank and the port tank empty) the boat had a noticable list to the starboard side. I balanced that by moving my passengers around, but it bothered me to see the boat sitting on the anchor leaning a bit to one side.
Barnett Childress posted 07-25-2001 02:34 PM ET (US)     Profile for Barnett Childress  Send Email to Barnett Childress     
Andy,
I've also noticed that the Montauk can be sensitive to weight distribution but mine sits perfect at rest.

Hey I just had a brainstorm. To correct for the list to port all I really need to do is buy a kicker and mount it to the starboard side of the transom :>! What a great reason to tell the wife why we "NEED" to get a kicker!
Barnett

MilwaukeeWhaler posted 07-25-2001 04:07 PM ET (US)     Profile for MilwaukeeWhaler  Send Email to MilwaukeeWhaler     
I have found that my list was corrected simply by triming the motor on plane. '95 90 merc with 17 pitch. Also make sure your skeg is adjusted properly. I am only a novice, however I had the same issues when I bought my Montauk in May. Good luck!
Charles
JohnT posted 07-25-2001 05:24 PM ET (US)     Profile for JohnT  Send Email to JohnT     
My Montauk lists to port a bit, much in the way you describe, and I've always chalked it up to prop torque and the fact that my battery is installed on the port side (I've thought about moving it to starboard but haven't gotten around to it; don't know how much difference it'd make anyway). A kicker mounted on the port side would definitely improve things.

Please let us know if you come up wit ha solution!
-John

Barnett Childress posted 07-25-2001 08:36 PM ET (US)     Profile for Barnett Childress  Send Email to Barnett Childress     
Checked the trim tab on the skeg when I got home this evening. It is not straight! The tab is definitely angled to the port side. I'll straighten it out and see what happens. Wife and I are taking a long weekend so I won't be able to check it out until next week sometime. Hope this is it.
Thanks,
Barnett
Hank posted 07-26-2001 12:44 AM ET (US)     Profile for Hank  Send Email to Hank     
My Montauk lists to port at rest and in motion. I think most of it is due to the location of the battery. I can offset this by moving to starboard a short distance.

I also find that often my steering to starboard is easy and steering to port is more difficult. This is controlled by adjusting trim until the steering effort is equal in both directions. This can be a very pronounced effect. In my case I think the listing is caused by weight distribution. The steering effort variation has to do with the trim.

I don't have NFB steering.
Hank

Whalerdan posted 07-26-2001 07:34 AM ET (US)     Profile for Whalerdan  Send Email to Whalerdan     
After I did my water pump this spring mine did the same thing. I figured I didn't get that rudder fin back the way it came off. I adjusted it ( it took a couple of tries) now everything is back to normal.

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