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  96 Montauk repower help

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Author Topic:   96 Montauk repower help
Bayouwhaler posted 06-02-2003 03:38 PM ET (US)   Profile for Bayouwhaler   Send Email to Bayouwhaler  
I have a 96 montauk with an 1992 Johnson 88. My last trip covered 78 miles and I burned 26 gal of fuel averaging 4800-4900 rpm. This 88 runs and starts good but the fuel consumption is starting to get annoying. From everything I've read on this site the consensus is to repower the the Suzuki 70 dfi with a setback plate. Does anyone have any experience with the Yamaha 90 fourstroke? I hear this motor may be sluggish and the non fuel injection is a downfall. Is there anything I can do to improve the fuel econmomy of a 11 year old carburated 2 stroke? All of my fishing runs in south LA are at least 40-50 miles. Unless I hear anything differnt I'll be calling the suzuki dealer soon.
Bigshot posted 06-02-2003 03:51 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I have run the 88 and the 70 on 17's and yes the 88 sucks the gas down. My 70 is about 2-3mph slower but burns 2-3gph vs 6-7gph on the 88.
Bigshot posted 06-02-2003 03:55 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
This might help.

If you want to spring for a new Suzuki DF70, there is a dealer in NC who has many leftover 2002. Contact: John Mckenna, Walsh Marine, (252)447-2277. I am not endorsing him but he claims to be the biggest dealer in the US. Price-- you may be able to get one for about $5k.
Michael
ratherwhalering posted 05-29-2003 11:27 AM ET (US)
--------------------------------------------Eds had the 2003 Johnson 4-stroke EFI, (which I believe is the Suzuki/Evinrude 70hp 4-stroke with a Johnson hood and wiring harness) for $5,399.00. When I asked for a shipping price, it was $5,599.00, $6049.00 shipped to California. They have since changed the website to reflect the additional $200.00 they quoted earlier.

daverdla posted 06-04-2003 09:34 AM ET (US)     Profile for daverdla  Send Email to daverdla     
Do you have a url for Ed's website?
Thanks
Dave
Bigshot posted 06-04-2003 11:19 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I believe it is edsmarinesuperstore but you will find it if you do a search under Johnson outboards.
Bayouwhaler posted 06-04-2003 01:08 PM ET (US)     Profile for Bayouwhaler  Send Email to Bayouwhaler     
Thanks Bigshot for the information. Happywhalering.
daverdla posted 06-04-2003 04:33 PM ET (US)     Profile for daverdla  Send Email to daverdla     
www.edsmarinesuperstore.com
Thanks
Dave
Bigshot posted 06-05-2003 10:50 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
man sometimes stuff don't make sense.

60hp 4 stroke $4900
70hp..........$5600
-------------------
$700 dif

90hp.....$6k
115hp....$6500
140hp....$7500

now the 60 & 70 are identical except for ECU that boosts the hp 10hp. I can almost see $700. Then the 90 which is a totally different engine is only $400 more than the 70? But the 115 which is the same as the 90 is $500 and then the 140 Which is the same as the 90 is 1000 more than the 115 and 1500 more than the 90? What gives?

masbama posted 06-06-2003 12:29 PM ET (US)     Profile for masbama  Send Email to masbama     
Biggs- That is almost as bad as the price difference between the 90hp Johnson 2 stroke and the 115 2 stroke. Same EXACT engine with some carb tweeking. I guess HP's cost bucks!
Bigshot posted 06-06-2003 02:06 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
If it don't make sense.....you must aquit!

Look at the monkey.

masbama posted 06-07-2003 12:20 PM ET (US)     Profile for masbama  Send Email to masbama     
Bigshot-By the way-what happened to your boat?
Sal DiMercurio posted 06-07-2003 07:09 PM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
Well, lets look at it this way, if you run that 88 at 48 - 4,900 rpms , you must like that particular speed, your certainly not going to like the 70 4 stroke because your going to have to run it at 6,000 rpms & no engine, not even the 4 strokes or DFIs give any mpg at wot, so your gonna be burning 7 gph in the 4 stroke.
What you need is a 150 DFI [ Evinrude FICHT ]& cruise at 2/3 throttle [ under 4,000 rpms ]getting 5 mpg.
Remember this, speed cost money & the faster you go, the more it costs, especially with a small engine that must be run at max rpms to produce that speed, where the bigger engine dosen't have to work near as hard, thus, much better fuel economy.
Sal
Perry posted 06-07-2003 09:23 PM ET (US)     Profile for Perry  Send Email to Perry     
I don't think you need 150 HP on a Montauk. It is a liitle over-kill plus it weighs over 400 lbs. Maybe a 115 FICHT or a 115 Mercury 4 stroke would give you the performance you want with fuel injection and good fuel economy.
Sal DiMercurio posted 06-08-2003 01:35 AM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
Anything bigger then a 120,.... a 140 would be the hot setup, but 140 is twice a 70,....something to think about.
A 70 is barely acceptable, but theres no doubt in my mind he will wish he went with double the horses if he gets the 70.
Your never unhappy if you have power to spare, it's just the oppostite when you dont & wish you did.
Get a 135 or 140, you wont regret it.
Sal
Bigshot posted 06-09-2003 11:15 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Sal the Montauk is rated at 100hp max.

My 88spl is only 3-4mph faster than my 70 4 stroke. So running he would need to run my 70 at 5k which would burn about 4.5gph.

These are facts....not opinions.

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