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  1987 20'Revenge @2000 bf130 honda performance

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Author Topic:   1987 20'Revenge @2000 bf130 honda performance
Mike White posted 03-02-2003 12:56 AM ET (US)   Profile for Mike White   Send Email to Mike White  
I'm looking at buying a 20' revenge with a low time 2000 130 honda. Test drove any produced 4000rpm swinging 13 pitch prop guessing around 23-24 mph @ 4000rpm, it appears that the water line is fine meaning boat seems not to be water logged, noticed the tach only went to 4500 on the guage dial. What should I be turning with this boat and at what speed. Also it has and old trailer in poor shape and a 1987 15 johnson that wouldnt start and frozen throttle cable. sure would appriciate some thoughts thanks mike
Clark Roberts posted 03-02-2003 07:00 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
Mike, something's wrong with this picture! That engine is rated to run 5000-6000rpm at wide open throttle and with its 2.0:1 lower unit gear ratio should be turning 6K and running at least mid 30's mph! Why only 4000 rpm?? Don't have a clue but could be the original set-up (engine height, throttle cables - not getting full throttle etc..etc..) BUT 4K rpm at WOT is NOT good as the timing is full advanced and severe pre-ignition will destroy the engine if run that way for extended time (maybe short time?). And why only 4500 rpm max on tach...???? sounds like a tach for a diesel... what? Others may have some insight and suggestions to help but this one is beyond me! Good luck... Clark ... Spruce Creek Navy
PS> maybe it's a 23" pitch prop and not a 13".. why not try a different prop and rule out the prop as the problem! BYW, I have a 21 REvenge (1979) with a Merc 115 4S EFI that swings a 15" prop (2.07:1 lower unit ratio) and it runs 38+mph at 5800 rpm... just to compare..Happy Whalin
Barry posted 03-02-2003 12:59 PM ET (US)     Profile for Barry  Send Email to Barry     
That boat is rated for 200hp and should probably run in the mid-40's with that power. The Honda 130 is a fairly heavy engine at 500lbs, so in my opinion it is a little light on the horsepower for that boat.

As Clark wrote, that engine should turn 5,000 to 6,000 at WOT. I looked at some of Honda Marine's Boat Application pages. They show the performance of the 130 on a BW 18-Guardian at 5,600 rpm and 40.6 mph using a 13-1/4 x 15 in. 3-bladed stainless prop. The 130 on an Edgewater 20'-4" D/C ran 37.9 mph at 5,700 rpm using a 13-1/4" x 13" 4-bladed stainless prop.

Based on the above, the 13" pitch prop should be close. Is it stainless or aluminum? How many blades? Regardless, of those answers the rpms are too low at WOT. You definately want the engine turning close to 6,000 rpm at WOT. Make sure the engine is mounted at the right height (anti-vent. plate 1-2" above the bottom of the hull), that the throttle linkage is correct, that the compression is within spec., and that the tach is working correctly. If the tach only reads to 4,500 it needs to be replaced.

Mike White posted 03-02-2003 03:29 PM ET (US)     Profile for Mike White  Send Email to Mike White     
just another note for you to chew on it seems louder than other 130 or for that matter any other four stroke that i've herd. Also barry what is WOT? And Clark thanks for the input if I could ask a favor, how many inches from the top of the transom to the water line measuring near the moter brackets. And are you sure your hull is water free. This would give me a way to compare weight since the water line on this boat may have been painted higher. Does any body know of a high gloss bottom paint and what color it comes in thanks mike
lhg posted 03-02-2003 06:48 PM ET (US)     Profile for lhg    
I would think the single 130 Honda engine on that boat would produce about 35 mph tops. And even this may be generous. I don't think it's anywhere near enough power for a boat like that, unless you like driving your car around in second gear. I think the boat alone weighs about 2500#.
jimh posted 03-03-2003 08:55 AM ET (US)     Profile for jimh  Send Email to jimh     
The 20-REVENGE with 200-HP is predicted to attain about 42-MPH. (See the Performance Prediction article in the Reference Section.

Having driven a 20-Revenge with twin 70-HP engines for several years, I would expect that if you have everything dialed-in just right and a light load you should be able to approach about 32-34 MPH with a 130-HP Honda at wide-open.

The hull needs a minimum of 90-HP to plane.

Sal DiMercurio posted 03-03-2003 10:39 AM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
The boat is way under powered.
You will run that poor little engine to a very quick death trying to get the boat on plane.
If your in any kind of following sea, you might as well drop your anchor, cause theres no way you will have enough power to climb up the back of even a 3 ft wave.
The "smallest" engine that particular boat should have is a 150 - 2 stroke.
Believe me, theres "NOTHING" worse then an under powered boat, because your at wide open throttle, [ wot ] all the time & still not going anywhere.
Sal
lhg posted 03-03-2003 02:44 PM ET (US)     Profile for lhg    
Unless you are prepared to spend the money to trade out the engine, I would take a pass.

130HP in 2-stroke version might get you by, but in the Honda 4-stroke, performance will really be bad on acceleration, etc.

This is perfect example of someone who fell for the glamour of a quiet 4-stroke idle, but failed to realize the "rest of the story".

Bigshot posted 03-03-2003 03:50 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
It could also be a waterlogged POS and in normal circumstances that 130 would not be a terrible option. My Dad's friend had a ribbed 21' outrage with a 1979 115hp OMC. I always thought that was underpowered but it did like 35mph and was plenty for him. Just like Clark runs some of his boats on the low side of the recommended hp so to each his own for their particular interests. The boat we are talking about sounds a bit cooky though and would require further info. before making any substantial conclusions.

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