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  170 W/90 4-STROKE--WHAT HOLES??

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Author Topic:   170 W/90 4-STROKE--WHAT HOLES??
bigjohn1 posted 04-21-2004 06:32 AM ET (US)   Profile for bigjohn1   Send Email to bigjohn1  
The 2004 170 I am purchasing from my dealer will be only the second Montauk he has brought in and sold. With limited experience rigging whalers, what set of holes in the transom should I ask that he mount the engine in?

What are pros/cons of the different positions?

Big John

Beaner posted 04-21-2004 07:11 AM ET (US)     Profile for Beaner  Send Email to Beaner     

I may be wrong, but I think the 170 Montauk comes pre-rigged from the factory. With my Montauk, the boat, motor, and trailer all came shrink wrappped together right from the factory on a truck.
Moe posted 04-21-2004 09:43 AM ET (US)     Profile for Moe  Send Email to Moe     
Here's where Whaler mounts the 90 4S on the 170:

http://www.engr.udayton.edu/staff/lriggins/Whaler/Transoms/170.jpg

They mount the 60HP BigFoot in the middle hole on the 150 Sport.

--
Moe

ghefty posted 04-21-2004 10:11 AM ET (US)     Profile for ghefty  Send Email to ghefty     
Big John,
I removed the shrinkwrap from my '03 M170 when it arrived at the dealer. It arrived by truck tied down to the trailer that comes with it. From what I saw dealer prep is minimal, remove the shrinkwrap, add lubricants and a battery (the boat is even shipped with the battery box already in place), install the prop, launch and perform a checkout. Of course then the fun begins, add GPS/Sounder, VHF w/antenna, Stereo, 2nd Battery w/switch, livewell.

bigjohn1 posted 04-21-2004 10:28 AM ET (US)     Profile for bigjohn1  Send Email to bigjohn1     
Moe, thanks for the photo details, that motor looks huge on the smaller transom; although I couldn't really make out any hole detail with regard to mounting.

Beaner/Ghefty, my boat will arrive at its new South Pacific island home of Guam via a 20ft shipping container floated over from LA on a ship. The boat is not completly rigged when it gets stuffed in the "can" due to all the extra space that would take up. In my case (and perhaps Hawaii as well), boats get rigged at the dealer upon arrival from the port. I'm sure Whaler provides the dealers in cases such as these with fairly detailed final rigging procedures. In my case however, the dealer is willing to work with me and can modify the rigging location as long as it doesn't contradict BW policy.
John

Moe posted 04-21-2004 11:05 AM ET (US)     Profile for Moe  Send Email to Moe     
John, the motor is mounted in the next to the top hole, or one hole up from the center of 5 holes, putting the AV plate below the bottom of the transom.

The motor looks larger because the photo was taken with a wide-angle zoom setting fairly close to the boat. Couldn't move back any further.

--
Moe

AQUANUT posted 04-22-2004 01:42 AM ET (US)     Profile for AQUANUT  Send Email to AQUANUT     
WOW!!!!!!!!!!!!!

I have yet to see a mt170 with a factory rigg on the 90 fourstroke....You have brought some questions to mind with your picture Moe

mercury marine taught me proper mounting heights in training.....basically all mercury/yamaha/honda outboards are designed to be mounted with the anti-ventilation plate on the same horrizontal plane as the keel.

there are some exceptions...for example , step hulls as in bass boats...that allow up to 5 inches difference putting the AV above the keel.. the absolutely lowest point would be 1 inch below the keel for AV plate....I currently run my 115 4[s] efi in the middle hole..it aids in performance concerning the hole shot.there is only 3/4 inch difference center to center hole to hole...but there is a noticable difference. I have tried it in both the second and third set...I setteled for the middle of five.

Barney posted 04-23-2004 08:49 PM ET (US)     Profile for Barney  Send Email to Barney     
Big John, You are going with the 4-stroke huh? Good choice. Jim
Moe posted 04-23-2004 09:30 PM ET (US)     Profile for Moe  Send Email to Moe     
All I know is that the AV plate at the bottom of the transom (i.e. in the middle hole) works great for me on the 150 Sport. Even in 2-4' or 3-5' chop the prop doesn't ventilate unless I'm trimmed out past optimum. I can't make it porpoise. Another 150 Sport owner, who boats on much calmer water, raised the motor 1 hole to 2nd from the bottom and got 1 mph more out of it. I'll sacrifice that for grip in chop.

Given that the 170 sits lower in the water, I see no reason why the motor should be one hole lower than the 150 Sport. The middle hole should work well for it also.

--
Moe

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