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Author Topic:   4 stroke for montauk
mickey posted 07-06-2001 05:26 PM ET (US)   Profile for mickey   Send Email to mickey  
Im thinking of repowering from a 93 Evinrude (90hp) to either a 90hp or 100hp 4 stroke. What concerns me is the additional weight. Depending on the manufactor there is from 60 to 100 lbs difference. Does anyone out there have any first hand knowledge on how this extra weight will affect performence. Maybe I should stick with 2 strokes, as Yamahas c90 is 60 lbs lighter than the motor Ive got now. Suggestions are welcome. Thanks
vdbgroup posted 07-06-2001 08:30 PM ET (US)     Profile for vdbgroup  Send Email to vdbgroup     
I have a Montauk w/ V4 Johnson 90 hp - 300 lbs. I added a 4" setback plate which moved moment back. Effect similar to increasing weight load. I noticed a better ride in chop as the Montauk is so light that it bounces to much without a good load. I also keep a battery in the rear. My opinion is that the Montauk rides much better through chop with more weight. I actually have passengers move to the rear when I need to get a smoother ride through chop. I would welcome a 400 lb. four stroke on my transom. I plan on it soon!
gvisko posted 07-06-2001 09:12 PM ET (US)     Profile for gvisko  Send Email to gvisko     
i have a suzuki 70 efi 4 stroke on
my montauk and it has all the power i
need a great motor gvisko
cmslim posted 07-09-2001 06:46 PM ET (US)     Profile for cmslim  Send Email to cmslim     
Just picked up my Montauk with a new F100 Yamaha Four Stroke. I used to have a 90hp two stroke Yamaha. I love the new engine, very quiet and seems to be considerably more efficient. Would had done it if the 90 hadn't needed a total rebuild. The 100 is the way to go but for the price difference I would reconsider unless you absolutely have to have the latest and greatest.
Kim posted 07-10-2001 04:58 AM ET (US)     Profile for Kim  Send Email to Kim     
gvisko ? that size prop are
you useing? did you get the
s/s prop from suzuki. I did
on mine it's a 13&1/4 x 18
I would like to know what you
found works for you. and are
you geting about one gal. per
hour or less. doing my 300
hr. service this week. may I
ask how meany hrs. you have
on yours.
kim.
JJD posted 07-10-2001 12:31 PM ET (US)     Profile for JJD    
How is the holeshot with the F100? Main concern is ability to pull a slalom skier.
andygere posted 07-10-2001 01:05 PM ET (US)     Profile for andygere  Send Email to andygere     
Has anyone considered just adding the difference in weight (using cheap barbell weights in a plastic milk crate) to simulate the ride, freeboard and performance of the boat with the extra 60 - 100 lbs. on the transom? Wouldn't be exact, but it would probably be close enough for decision making purposes.
cmslim posted 07-10-2001 06:53 PM ET (US)     Profile for cmslim  Send Email to cmslim     
JJD, Holeshot with the F100 is great. I have not tried to pull a skier behind it but I would anticipate it to be good! I have acces to a friends Nautique so that's what I use to pull my 250 lbs around. If you're an aggressive skier you probably don't want to ski behind a Montauk anyway.
flwhaler posted 07-10-2001 10:33 PM ET (US)     Profile for flwhaler  Send Email to flwhaler     
The hole shot for the F100 should be great. I ski behind a Montauk with a 70 hp evinrude and it does well with the right prop. I can imagine the performance on the F100 to be very good. The four strokes are very powerful at low ranges. They lose that power at high ranges where 2 stroke doesn't..right?
stagalv posted 07-11-2001 10:00 AM ET (US)     Profile for stagalv  Send Email to stagalv     
Mickey,

The F100 Yam weighs 356lbs. I have a 115Ficht which weighs 362lbs so basically they are the same weight. One difference is that I also have a manual jack plate which weighs about 35lbs.
My boat does fine with the weight back there. I have two batteries under the console so maybe that offsets the weight somewhat. Look at the photos on page 41 of the Cetacea section. There is a photo of my boat compared to a Montauk which has a 90 Yam. This offers a good chance to see the difference in trim. Rex

Barnett Childress posted 07-11-2001 05:57 PM ET (US)     Profile for Barnett Childress  Send Email to Barnett Childress     
Bought my Montauk with the Merc 90HP 4S. Just finishing up breaking her in but so far we love this engine. Extra weight has not been a problem at all. Love the quiet, no shaking, no smoke, no fouled plugs at extended idle. Only down side was the extra $$ but worth it over the life of the engine IMO.
Barnett
gvisko posted 07-11-2001 08:49 PM ET (US)     Profile for gvisko  Send Email to gvisko     
kim i have the stainless steel prop from
suzuki i think its the same as yours
i have very little hrs on motor it seems
to run great more power then my johnson 88hp
2 stroke i wiil be using boat this weekend
fluke fishing in moriches bay and i will
get back to you with gas question. i
cant belive how quiet this motor is
you dont even know it is running
. the dealer says he sells a lot of starters
due to people double starting them.
talk to you soon gvisko<><

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