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ContinuousWave: Whaler Performance
Repowering 22 Revenge with Honda 90's
|Author||Topic: Repowering 22 Revenge with Honda 90's|
posted 08-01-2001 02:18 PM ET (US)
I am considering repowering my 89 Revenge WT with twin Honda 90's instead of a single 200HP Merc. Is this enough power for the boat to comfortable cruise at 28 to 30 knots under various load conditions. Are there any other issues I should be concerned with?
posted 08-01-2001 02:29 PM ET (US)
Uh..... What is the max, can you go 115's? the 115 Suzukis are about $6800 a pop and on my buds 23 Seacraft, it does about 42+ and cruises at about 31 at around 4200+rpms. I guess you could get the 28 with 90's. If it was an outrage, I would DEFINATELY say so.
posted 08-01-2001 03:06 PM ET (US)
What's on it now?
posted 08-01-2001 03:32 PM ET (US)
I assume a single 200 Merc. Price dif between the 90's and 115's is usually close. Unfortunately with Honda the 115 is a lot heavier in weight and $$ than the 90. With Zuki, the 90 and 115 are alike. Yamaha has the 100's that would be sweet too.
posted 08-01-2001 04:05 PM ET (US)
Thanks for the quick replies; I'll check the rating plate, but I believe its rated for 230HP. Currently it is powered by a 1989 Merc 200HP.
posted 08-01-2001 07:27 PM ET (US)
I am also repowering my Revenge V-22, but have decided on twin 115 Yamaha four strokes. My hull is a 1981 rated for 240 horses. Hondas are supposedly great engines, but the weight for a 115 vs the Yamahas was about 70 lbs per engine! Wow! Just wondering why you were considering the Hondas as opposed to other engines. I ruled them out first because of weight, then found out I could end up with a great deal on the Yamahas.
posted 08-01-2001 08:30 PM ET (US)
Why go to twins? Are you going significantly offshore? I'd want to know if a 90 4-stroke has enough torque to put the 22 on a plane if the other went bad (although that is probably not as likely these days). I would think that with twins, you'd probably want to max out the horsepower and go with 115s. How about repowering with one of Yamaha's new 200 or 225hp 4 strokes. You'd have about the same hp hanging on the transom but a lot less weight (at least 100lbs less by my guess).
posted 08-01-2001 10:21 PM ET (US)
I could just be displaying my ignorance, but I wonder: if you have the weight of the hondas, and need to run home on one engine, would it be able to get on plane? I wouldn't count on it at that power rating and weight. If that was the case, you might get equal off plane performance with the lighter weight of a single large motor combined with a 15 or 25 horse auxiliary motor, burn a lot less fuel running a single, have better trolling performance, and spend a whole lot less money on the repower.
posted 08-02-2001 11:23 AM ET (US)
Believe it or not, twins run better than a single, ususally. My buds 23 seacraft with a single 225 ocean runner was slower at cruise and top than his 115 Zuki 4's. She will plane with one but I would not do it.
posted 08-09-2001 01:56 PM ET (US)
Next time your 22-Revenge is out of the water, check the bottom. You'll see that there are two strakes near the keel centerline in the hull that end about 3-4 feet from the transom. The reason the strakes stop is to allow twin engines and their lower units to ride in clean water. The boat was definitely designed with twin engines in mind.
posted 08-09-2001 02:42 PM ET (US)
I would think a pair of Honda 90's would perform fine on a 22 Revenge, about 42 top end. But not the Honda 115's. They're a whole different beast, with too much bulk and weight!
Take a look at the Merc or Yamaha 115 EFI 4 strokes before you buy Honda 90's. You'll like them. I'll bet they're the same price (Mercs about $7100 each, Yam about $8000 each), and I hear they're really fast.
posted 08-12-2001 09:11 AM ET (US)
Based on my experience with a Revenge-20 with twin 70-HP engines, I would suggest that when repowering your Revenge-22 you might want to go for more than twin 90-HP engines.
On my boat, to reach your desired "cruise" speed of 30 knots (34 MPH) you would be running near wide-open-throttle (WOT). We tend to cruise at about 23 MPH (20 knots), where the engines are running at about 3/5ths throttle.
Often there are engines in the 90-100-115 horspower range that are of identical displacement and weight, making the issue of weight, static trim, etc., not much of a concern. I would opt for the higher horsepower. The only drawback will be a modest increase in price which will be paid back in better performance, particularly under heavy loads, and increased engine longevity (from being able to run the engine at lower crankshaft speeds).
There is also the twin engine factor to consider. Twin 90-HP engines are not the same performance as a single 180-HP engine. They are probably more like a single 150-HP engine. Powering with twin 115-HP engines should produce performance more like a 200-HP single engine.
Another consideration with twin engines is whether or not the boat can attain plane with a single engine. I would suspect that a single 90-HP would be very marginal for planing a 22-foot hull.
Suzuki has a new 140-HP 4-stroke engine that has the same displacement as their 90- and 115-HP models. This might be an excellent candidate for your situation.
posted 08-13-2001 10:25 PM ET (US)
I have a 1985 Revenge 22. The boat is equipped with twin 115 hp 2 stoke Yamaha's. I normally cruise at 3100 rpm on each engine. This gives about 25 to 28 mph depending on the load. This is probably too much power for the boat. I can only use WOT on limited occasions. Top speed is around 45 to 48 mph depending on the load. The boat will plane on one engine, but it takes a while. I have only done it once, when I could not get the other engine running.
I have heard the debate of one versus two engines. If I had to do it again, I would definitly go with twins. It is peace of mind in case one won't start. The biggest advange though is being able to spin the boat around in its own length (differential thrust).
posted 08-15-2001 04:25 PM ET (US)
Re: Your observation that the 22' Revenge was constructed to be powered with twin engines. Was my 21' 1974 Revenge also constructed with twin engines in mind?
1974 Boston Whaler Revenge 21'
BTW:You're doing an excellent job moderating the forum. Thanks.
posted 08-15-2001 08:36 PM ET (US)
Both the 19 and 21 were designed single or for twins. Remember the biggest outboard back in 1973 was a 135 and merc had a 150. The 19 has a max hp of 170=2x85hp.
posted 08-30-2001 11:57 AM ET (US)
I have a 88 22 Revenge that had twin 120's. Boat ran great w/top speed mid 40's. the only problem was with drift fishing in the rips of Cape May, NJ I took a signifigant amount of water over the transom and the boat would drift transom first. Contacted an old time whaler employee and he said the weight of the twins was high and that whaler made a kit for keeping the water in the rear well. Any how the fix was a new 175
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