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ContinuousWave: Whaler Performance
|Author||Topic: New Motor!!!!|
posted 11-24-2000 08:43 PM ET (US)
I finally got my Montauk on the river today to start the 10 hr break-in on my new Yamaha C90. After sitting in the yard for 10 days while I had the flu and waiting for the rain to stop and the temperature to rise, my son and I put the first 1.5 hrs on the Yamaha.
Smooth and powerful! I guess the old Evinrude 115 was more tired than I knew---the 90 seems more spirited----at least as much as I can tell in not yet exceeding 4000 rpm. As per the manual, we did make a couple of full-throttle take-offs, and she really jumped out of the hole. She's equipped with a Michigan Wheel 13X17 SS prop and I won't know until we hit WOT if this is the ideal unit, but I do know we have quite a hole shot. The 1.5 hours barely moved the fuel level in the 27 gal tank, so I think she's going to be fuel-thrifty too. Only complaint so far is a fairly rough, cough & spit idle. We'll attribute this to the 25:1 break-in fuel mixture until we find out differently.
So far I love it!
posted 11-24-2000 09:19 PM ET (US)
clark roberts told me to adjust idle air screw on carb. for the spit your talking about-mine did same thing--it eliminated mine spitting--it just needs fine tuning--you got the best motor money can buy--4 strokes to heavy and no power
posted 11-25-2000 02:06 AM ET (US)
Hope your new motor give you lots of good times.
posted 11-25-2000 09:54 AM ET (US)
enjoy the new motor. I hope it gives you lots of fun on the water.
posted 11-25-2000 10:13 AM ET (US)
Scott, glad the air adjustments solved the idle sputter for you... In northern climes( not applicable to Sneads and Lake Seminole) often times a readjustment in very hot summer weather is necessary... BTW, I have run from apalach to Columbus and spent my childhood days on Chipola River and Dead Lakes.... Grew up in Graceville, born in Greenwood etc.... as I sit typing, I'm in Mexico Beach.... getting a little beach time... Compounder, after break-in you may want to inspect throttle linkage/carb butterfly valve and make sure you're getting 100% full throttle... the 17" pitch should get you near the 5500rpm max... I have a Montauk with 90 Yamaha and it gets about 5300 with 17" pitch (pushing 40mph)... may switch to 15" to get rpm up to 5500-5600rpm... I carry light loads so am in no danger of lugging engine with the 17" pitch.. happy Whalin... Clark.. Spruce Creek Navy PS> am going to sell the Montauk probably next month!
posted 11-25-2000 09:28 PM ET (US)
Thanks everyone. I put on another hour today and got cruise up to 4000 rpm---nice cruising speed. Manual allows full throttle up to 1 minute at this point. We could only attain about 4900 rpm though. Either I did not get the 17 inch pitch prop I asked for or we have some other problem. Going down to the dealer to swap props Monday or Tuesday. Idle still at cough & spit stage, but hesitant to adjust anything with so little usage and running the rich mixture. Sure am impressed with the power of the 90 though!
Clark--why are you selling your Montauk? You still have other Whalers?
posted 11-26-2000 07:26 AM ET (US)
Compounder, you may indeed need the 15" pitch prop but engine isn't completely broken in yet , I wager. The engine will be at full power after about 30-50hrs and when it's on a standard oil diet, so expect best power a little later on.. the idle/air adjustments (one on each of the 3 carbs) should be a dealer task (you can probably do it better)as part of the 10-20hr check-up... other tasks are retorquing the head bolts and other bolts, cleaning and gapping spark plugs, changing the lower unit grease, linkage (throttle, shift, timing) adjustment if necessary...etc.. Also check motor mounting height and if motor is all the way down (highest bolt holes used) try raising motor at least one hole... my 90 Yam is mounted in second hole... this will relieve underwater drag and rpm will go up...(you should check wide open throttle (WOT)with light load and engine trimmed out.. that's all I can think of right now..at my age that's pretty good.. heh, heh.. I'm contemplating selling the Montauk because of space in my boatyard... currently have 5 Whalers plus my buddy's 23 Conquest taking up space... I bought the Montauk because it was so pretty and I just can't resist ANY Whaler with a for sale sign on it(especially a Montauk!)... the hull is an 86 and the engine is a 1988.. additionally, I just spotted a 1973 Outrage 19 (in terrible shape with a junker engine) and would like to buy that and make a "low profile" out of her... so need more room yet! If I buy the 19 I will definately sell the Montauk... I have had lots of Montauks and really love them.. May get a peek at Scottfarm's Montauk this AM as he is trailering to Mexico Beach (where I'm vacationing) for some gulf fishing... glad the carb adjustments solved his idle sputter... happy Whalin'... Clark
posted 11-26-2000 06:21 PM ET (US)
Five Whalers!!! Wow!!! Clark you must be single! I haven't convinced my wife yet that I need the two boats and one Sea-Doo.
posted 11-27-2000 09:00 AM ET (US)
Compounder, I have a bad case of "Whaleritus"
(a social disease, spread by casual contact for which there is no cure, only constant treatment)... fortuantely , my wife has been infected also! She has never questioned or complained about any Whaler purchase and has even mentioned that our 21 Revenge may be too small and a 25' Revenge looks very nice.... doesn't get any better than that! Clark... Spruce Creek Navy
posted 11-27-2000 09:16 AM ET (US)
Clark speaks the truth Joe --- chuckle he has inflicted numerous folks all over the world with the disease!
Just look at us with 3 Whalers --- all purchased this past year after contact with the chief of the Spruce Creek Navy --- before we were content with just one!!!
One is fine you can get by --- two is better then you have a little variety --- three makes for a nice number so boredom doesn't set in --- four is great so can you have a spare --- and 5 is best so you have one for each day of the week ---- and six they come and take you away ha ha -- ha ha :)
posted 11-27-2000 10:29 AM ET (US)
Tom, maybe Whalers should be accounted for in terms of "total lineal feet" instead of numbers.... hummmmm, let's see now, you would have about 49-50 lineal feet! And "total brake hp -SAE" or etc... hey, I'm loosing it here... Clark
posted 01-08-2001 12:48 PM ET (US)
Although a relatively old posting, was glad to read your news on the C-90.
I have a '69 hull that I have been slowly restoring over the past 3 years. Just received word that the C-90 (2001) which I ordered is in. With a little more dash work (restored and awl-gripped the original mahogany console and am replacing the helm and all wiring) I will have it in to the dealer for installation. Unfortunately, it will be months before she can get in for a test run here in Chicago.
My installing dealer is not a whaler dealer. Does anyone have any special recommendations or things to watch out for when they mount the Yamaha on a classic whaler.
Sure would appreciate any advice.
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