lankrom
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« on: August 04, 2009, 09:08:40 PM » |
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I have a 1991 rinker 186 captiva br it has the 4.3l mercruiser engine the problem i am having is that i dont think the boat is going as fast as it should I can only get it up too 36-37mph full throttle and i only have 2 adults in the boat me included in the 2 it has a stilleto 19" prop anyone have the same boat or one like it that can offer some help or is this as fast as it is supposed to go any help would be great thanks
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186CAP
Dock Hand
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Location: Indiana
Boat: 1989 Rinker Captiva 186
Posts: 18
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« Reply #1 on: August 05, 2009, 03:30:40 PM » |
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I have an 89 Captiva 186. I bought it last fall so this is first summer. First few trips my speedomoter wouldn't work. I adjusted the tube at the back of the boat and it would register once I got going and start out at 15 mph. I opened it up with 4 people on board and it was only at 30 mph. It's has stopped working again. I don't know if that was an accurate speed and I don't know what this motor (same as yours but have a 21 pitch prop)) was suppose to be able to do. But 36 mph seems good to me.
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lankrom
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« Reply #2 on: August 05, 2009, 06:07:59 PM » |
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i hear of some other types of boats hitting 45-50 with the same motor just wondering why they get so much more out of theres and if there is anything to do to help this out
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186CAP
Dock Hand
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Location: Indiana
Boat: 1989 Rinker Captiva 186
Posts: 18
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« Reply #3 on: August 05, 2009, 07:58:51 PM » |
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I just had my 21 pitch prop repaired and they told me for tubing and skiing that a 19 pitch would be better for pulling out of the water. It will lose some top end so if you are looking for more speed than perhaps a switch to a 21 pitch prop would help.
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lankrom
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« Reply #4 on: August 05, 2009, 11:05:45 PM » |
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what kind of speed are you getting out of a 21p i dont wanna lose much on pulling but just thought that with a v6 it would go much faster should have bought a v8 lol
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kjrinker94
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Location: Mid Michigan
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« Reply #5 on: August 05, 2009, 11:25:30 PM » |
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My opinion, which isn't worth anything.....your boat should be reaching 40mph at a minimum, maybe even 41-42 ish. I'm assuming due to the boat being a 91 that it is carbed. We have a 209 with the 305 V8, carbed and a 19pitch 3 blade aluminum and I'm getting 46 at wot. Apples to Oranges yes but your boat should come in quite a bit lighter than the 209 and there really isn't that much less power in your 4.3L The big difference is the torque curve. That's where the V8 really shines, getting up out of the hole faster. You can't trust the speedo in the dash. GPS is the best way for an accurate reading. Grab your GPS out of the car for a simple test. One more thing, once on plane do you trim the outdrive up slightly? You'll hear the difference in the engine and gain 1-2 mph. If after GPS testing and playing with the trim position you're still at 36-37mph you may want to do a complete tune-up. Look at your cam timing too, it may be off.
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lankrom
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« Reply #6 on: August 05, 2009, 11:37:11 PM » |
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those numbers are gps verified and with playing with trim a bunch on glass water i thought it should get alot better mph the that must be time for a complete tune up anybody with a 4.3 21p have any speed numbers and how does it pull with the 21p thanks for the help guys
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lankrom
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« Reply #7 on: August 05, 2009, 11:38:49 PM » |
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ps. does anyone know the wot rpm for my boat i cant find it anywhere cause all i can get out of her at wot is 4000 rpms
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lankrom
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« Reply #8 on: August 06, 2009, 01:45:01 PM » |
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how do you clean the flame arrestor?
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raybo3
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« Reply #9 on: August 06, 2009, 02:24:41 PM » |
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Take it off and spray with carb cleaner...
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Ray*
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coehlert
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Location: Iowa
Boat: 1995 Rinker 180
Boat name: The Chadamy
Posts: 13
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« Reply #10 on: August 07, 2009, 09:54:45 AM » |
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My '95 180 with a 3.0l 4 banger can get up 42 mph with 3 adults on board. 36-37 seems pretty slow for your set up. The 4.3l should get your boat close to 50mph. What kind of shape is your prop in? I filed some small nicks down from my prop and gained about 3mph instantly.
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Chadamy
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Bullylover22
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« Reply #11 on: January 26, 2010, 12:37:18 PM » |
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Lankrom, I have a 88 186 captiva used on a fresh water lake I turn a 20 pitch 3 blade turbo for tubing and all around skiing and max wot turns out 42 to 44 when I turn a 23 for just wot cruising trimmed out as far as she goes 4 adults in the boat she steps up 48 to 50 I have the 4.3 mer druiser with the alpha drive she runs like a top Hope this helps if not e-mail me I work on boats here in Dayton Ohio have been Mercruiser certified since 1988. jcantrell22@aol.comJoe |
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nkolarpsk
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Location: Chicago
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« Reply #12 on: March 10, 2010, 02:23:31 PM » |
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Just for reference, consider my boat - '93 Captiva 186:
I have the 4.3L (4bbl carb) and a 21p prop. My top speed (2 - 3 adults) was between 47 - 50 mph. With me alone and perfect lake condtions, it will hit 51 - 52 mph.
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'93 Rinker Captiva 186 - 4.3L
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Vigilance
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« Reply #13 on: March 10, 2010, 09:46:21 PM » |
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WOT for a 4.3 Mercruiser is 4400-4800 RPM. If you are running a 19 pitch prop(which the 4.3 has plenty of power to turn) there is something else going on. Start with a tune up first. Also might want to replace fuel filter if you have one on that. I'm guessing a fuel flow issue myself.
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Rinker Boat Owners
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