Author Topic: Pondering a repower of my sea explorer...  (Read 682 times)

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Offline Svinny88

Pondering a repower of my sea explorer...
« on: June 12, 2019, 11:29:35 PM »
Well... I seem to be running out of things to do to the boat.... seadek or marine mat are on the back burner, the webasto heater , and a 2nd mfd to network with my solix are also on the back burner ... and I’m back on a repower kick.  Currently have a 2002 Honda bf90 on my 1998 sea explorer, with under 300 hours  with a Honda 13.25x15 prop, and trim tabs, max speed is 30-31mph, wot@ 5700-5800.  I am loaded heavy, but for some reason I thought I would be in the mid 30s wot, I actually lost 1 mph top speed switching from the 13x19 prop that was originally on the motor.  I did not notice much holeshot increase, with or without the tabs.   Biggest issue I have is that the charging capacity of this motor(15amp) is not enough for my needs/fishing style. When I fish, a lot of the time it’s from Friday evening until Sunday evening.  I found a smoking deal on a brand new 2018 model Honda bf100, 8,700$. It has a 35amp charge capacity, same weight as the bf 90 I currently have, and I will gain nema 2000 connectivity, fuel injection, and the trolling speed features.   Does anyone have a 100hp motor on a 16’ arima?  Any thoughts or advice?  I have been offered 2000$ for my motor, also not sure if that’s the right price or too cheap   What are your sea explores and chasers top speeds loaded with what motors?   I did think about the f70, but I don’t think the 100lb less weight is worth 30 hp less, and I don’t plan on putting a kicker on, so transom weight is roughly the same,bf90/100 single engine, or f70(roughly 250?) plus kicker bracket and 6-8 hp. (Roughly 100lb?). 
1998 15’11” sea explorer. 2002 bf90
 “T roLL on 1”

Re: Pondering a repower of my sea explorer...
« Reply #1 on: June 13, 2019, 03:50:57 AM »
Getting a new df150tlw for 9k before rigging fees etc on my SR 19.
Have to upgrade to hydraulic steering.
That's the plan anyway.
The yard doing the work needs to look her over first.
I show ~21 inches from the top of the stern to the bottom of the keel.

In another thread ... the 20" vs. 25" is supposed to be the right shaft length.

I'm going from the dual honda 50's to this.
I'll have a used 50 for sale that's running sweet.
The other for parts or repair. 3rd cylinder compression isn't what it should be.
It'll also need tilt trim rebuild.


Online Fisherdv

Re: Pondering a repower of my sea explorer...
« Reply #2 on: June 13, 2019, 06:02:09 AM »
Well... I seem to be running out of things to do to the boat.... seadek or marine mat are on the back burner, the webasto heater , and a 2nd mfd to network with my solix are also on the back burner ... and I’m back on a repower kick.  Currently have a 2002 Honda bf90 on my 1998 sea explorer, with under 300 hours  with a Honda 13.25x15 prop, and trim tabs, max speed is 30-31mph, wot@ 5700-5800.  I am loaded heavy, but for some reason I thought I would be in the mid 30s wot, I actually lost 1 mph top speed switching from the 13x19 prop that was originally on the motor.  I did not notice much holeshot increase, with or without the tabs.   Biggest issue I have is that the charging capacity of this motor(15amp) is not enough for my needs/fishing style. When I fish, a lot of the time it’s from Friday evening until Sunday evening.  I found a smoking deal on a brand new 2018 model Honda bf100, 8,700$. It has a 35amp charge capacity, same weight as the bf 90 I currently have, and I will gain nema 2000 connectivity, fuel injection, and the trolling speed features.   Does anyone have a 100hp motor on a 16’ arima?  Any thoughts or advice?  I have been offered 2000$ for my motor, also not sure if that’s the right price or too cheap   What are your sea explores and chasers top speeds loaded with what motors?   I did think about the f70, but I don’t think the 100lb less weight is worth 30 hp less, and I don’t plan on putting a kicker on, so transom weight is roughly the same,bf90/100 single engine, or f70(roughly 250?) plus kicker bracket and 6-8 hp. (Roughly 100lb?).
in my opinion it’s just not worth it. All said and done and rigged up with that motor you’re looking at about 10 grand. I don’t think you’ll ever get much over the very low 30s with the kind of weight you’re running in your boat. Five batteries upfront is probably pushing the bow down a bit which is creating more drag so not going to get much more speed no matter what motor you have. By the way I believe 100 hp is the max on the 16s. Arima’s were made to be efficient boats running with lightweight and low horsepower. If you want an Arima to get into the mid 30s even the 40s I think you would have to go with a 19ft Arima. The proportions of the hull are much better suited for a little bit more speed my two cents.
2018 Sea Chaser 16, Honda 60HP

Offline Yachter Yat

Re: Pondering a repower of my sea explorer...
« Reply #3 on: June 13, 2019, 06:31:08 AM »
   Fisher:  He's got to be heavier than we think.  As Arimas go, the 16 is a pretty efficient hull.  Heck, I'm doing better than 35 MPH with my 60 Honda.  Granted, the Chaser (in and of itself) is a bit lighter than the Explorer.  Despite that, seems to me he should be doing better than 30 or so.  I suppose the collective result of a heavy motor, trim tabs, being heavily loaded as well as placing too much weight forward can certainly raise hell with the performance of any Arima.......apparently, even one sporting close-to-max HP. 


Yat
« Last Edit: June 13, 2019, 06:51:48 AM by Yachter Yat »
Dear Arima:  How about stretching the Sea Hunter 5", the Explorer 13" and the 21's.....16"? 

16 SC/Honda 60

Offline amazing grace

Re: Pondering a repower of my sea explorer...
« Reply #4 on: June 13, 2019, 08:00:45 AM »
I Would revisit the max hp rating and the max weight limits of your boat.  You may be surprised and what they are and where you are at.

There is a point of no return. Once you get to that point   it is time to go back and start over. Access needs and priorities. You can only do so much with any boat. Asking it to do more than its capable means one of two things. Ease up or get a new boat! Imho
1989 22' C-Dory Angler

Online Fisherdv

Re: Pondering a repower of my sea explorer...
« Reply #5 on: June 13, 2019, 08:21:35 AM »
I Would revisit the max hp rating and the max weight limits of your boat.  You may be surprised and what they are and where you are at.

There is a point of no return. Once you get to that point   it is time to go back and start over. Access needs and priorities. You can only do so much with any boat. Asking it to do more than its capable means one of two things. Ease up or get a new boat! Imho
Agree. You may have already outgrown your 16. Instead of close to 10k for a new motor, it may be time for a 19.
« Last Edit: June 13, 2019, 08:55:48 AM by Fisherdv »
2018 Sea Chaser 16, Honda 60HP

Offline Chief of the Boat

Re: Pondering a repower of my sea explorer...
« Reply #6 on: June 13, 2019, 08:24:33 AM »
What Coast Guard sticker do you have?



1994 Sea Explorer 1511 loves whitecaps 2010 Yamaha F-70 2012 Yamaha F-8 with a  Fixed SaltBoss Bracket Lowrance HDS-5 & 7 Gen 2 Standard Horizon Fixed VHF 2150 with AIS

Offline Svinny88

Re: Pondering a repower of my sea explorer...
« Reply #7 on: June 13, 2019, 10:11:15 AM »
When the Honda was put on , in 2002 , the sticker was revised to the 100hp sticker   There is no going to a 19, this boat works excellent for me, and I can live with the 30-31 top speed, it just seems low for a 90. I had a 2013 13’ sylvan Alaskan, side console with a 1985 25 hp , loaded with 3 batteries, front and rear deck, I pilot trolling motor,2 adults,2 8 year old kids, a 14 gallon bait tank, and 30 lb of ice, it would jump out of the hole and do 30 mph.    The one thing I can’t live with is the charging amps   The 15 amps is not enough for my trips.  It’s plenty for one day/24 hours, but most of my trips are 48hours+, and I don’t have time or a place to dock and charge batteries.   I don’t want to change or up battery size ,  and I do plan on switching the trolling motor batteries to lithium batteries, which will cut 100lbs off the boat.   
 When I accelerate, without tabs, the bow still comes way up, before it starts to plane, similar to my old 20’ Grady white. That old Grady , fully loaded, 200hp Yamaha 2 stroke, 9.9 kicker, 60 gallons of fuel, full hardtop and way too much gear and ice would top out at 42mph wot.   

Does anyone think that another prop change, possibly getting  my wot at 6000rpm would make a difference?
1998 15’11” sea explorer. 2002 bf90
 “T roLL on 1”

Offline amazing grace

Re: Pondering a repower of my sea explorer...
« Reply #8 on: June 13, 2019, 10:18:53 AM »
No expert as I am still trying to figure out the right prop for my F70/SE combo myself.

It sounds to me like you are propped about right. With the weight it might be worth dropping down in pitch one  click to see if that does anything to help. 
1989 22' C-Dory Angler

Offline Svinny88

Re: Pondering a repower of my sea explorer...
« Reply #9 on: June 13, 2019, 10:34:11 AM »
i can get a 13.25x13 aluminum Honda prop for 50$.  I guess I’ll try that, can’t go wrong for a 50$ bill , right?    So... hypothetical question.  If any of you were purchasing a new Honda, the 75/90/100. Are all the same weight, 359lbs..... the 100 is 400$ more than the 90... would anyone not get the 100, on a boat that is rated for it?   I’m also open to any other 90-100hp engines that are lighter...but other than the etec I don’t think one exists
1998 15’11” sea explorer. 2002 bf90
 “T roLL on 1”

Online Fisherdv

Re: Pondering a repower of my sea explorer...
« Reply #10 on: June 13, 2019, 10:38:32 AM »
The best option may be a F70 @ 253#, and use it to troll as well. Then you could ditch the electric trolling motor as well as 3 of the batteries. That would also solve the need for charging all those 5 batteries. Good amount of weight savings as well, and you’d probably still be @30mph @WOT.

I thought my boat was slow as well when I got it. I do 30mph WOT. Sometimes it can be a long ride to the fishing spots at a reasonable cruise speed. My 15ft Klamath was faster with a 40 on it. I’ve learned to deal with it and enjoy the other positive things about the Arima.
« Last Edit: June 13, 2019, 10:52:01 AM by Fisherdv »
2018 Sea Chaser 16, Honda 60HP

Offline lloyds

Re: Pondering a repower of my sea explorer...
« Reply #11 on: June 13, 2019, 10:44:37 AM »
97 explorer with 2018 bf 60 is 30 on my boat with the 13" pitch.  14 is a little more.  15 is just too much prop but goes faster once it gets on plane.  can't imagine a 100 or even more on my explorer.

Offline blindmonkey

Re: Pondering a repower of my sea explorer...
« Reply #12 on: June 13, 2019, 10:51:55 AM »
Have you looked into upgrading the alternator? 
Lorne
2013 17' Sea Chaser, Honda 90, Yamaha F8
1994 Sea Explorer, Mercury 60, SOLD

Offline Svinny88

Re: Pondering a repower of my sea explorer...
« Reply #13 on: June 13, 2019, 10:54:53 AM »
Ditching the trolling motor is not an option.  My trolling speeds are .3-.8 mph, and in windy conditions,if you could get an outboard to troll that slow, you will never keep it on coarse.  Pulling from the bow is the only option.  I have many hours of cutting and untangling lines, dragging socks,buckets,and sea anchors,and eating wakes trying to backtroll.    I’ve talked to some with the f70, and fully loaded, take a little bit to get on plane.  I will be switching my tm batteries to lithium this fall, 1500$for 3, and I will lose90-100lbs. 

Is there anyone out there with a 90-100hp on their 16’ arima?  I can’t be the only one can I? Lol

I read somewhere on here that with a heavy 4 stroke on the back , the battery relocation, and filling the 14 gallon water tank in the bow is recommended   With the 5 batteries relocated, and the tank empty, I am in the ballpark of the same weight.     
 
What are the guys running the sea explorers topping out at for speed?  I guess it is possible this hull will not go any faster than 30, no matter the hp when loaded heavy
1998 15’11” sea explorer. 2002 bf90
 “T roLL on 1”

Offline Svinny88

Re: Pondering a repower of my sea explorer...
« Reply #14 on: June 13, 2019, 10:56:36 AM »
Have you looked into upgrading the alternator?

No I have not... is this possible on a 2002 Honda bf 90? 
1998 15’11” sea explorer. 2002 bf90
 “T roLL on 1”

Offline amazing grace

Re: Pondering a repower of my sea explorer...
« Reply #15 on: June 13, 2019, 11:02:14 AM »
There is a point of no return when it comes to hp, hull, weight, etc. I would be curious how much over the weight rating you are for that hull. Obviously you are over. You do not need to tell us. Just be honest with yourself. And no, you are not going to make significant improvements with your current situation. You could achieve basically the same thing with a lighter,  lower hp motor. End of story.
 
1989 22' C-Dory Angler

Online Fisherdv

Re: Pondering a repower of my sea explorer...
« Reply #16 on: June 13, 2019, 11:05:40 AM »
The only member I know that is going above 35mph with a 16 is Yat. Still wondering how he does it 🤷🏻‍♂️
« Last Edit: June 13, 2019, 11:14:10 AM by Fisherdv »
2018 Sea Chaser 16, Honda 60HP

Offline mustang65fbk

Re: Pondering a repower of my sea explorer...
« Reply #17 on: June 13, 2019, 11:22:21 AM »
$10k just to get into the mid 30's?  No way.  It would be nice to have all of the NMEA gear and components in there to determine your gph and other fuel economy but not at that expense.  Could you run a NMEA 2000 network with your current engine and like another member mentioned, upgrade your alternator to a larger size?  There are lot's of other things I'd much rather spend $10k on than a motor that sounds like it's running quite well as is, especially right now when you want to be out on the water using your boat, not waiting for weeks and weeks on the shop getting it finished. 
2003 21' Sea Ranger Skip Top
2003 Honda 130hp 4 Stroke

Offline Svinny88

Re: Pondering a repower of my sea explorer...
« Reply #18 on: June 13, 2019, 11:35:03 AM »
Ok... so rough estimate on weight, engine, batteries, 27gal fuel,trolling motor, and 40 lb of ice I’m roughly at 900 lbs.   

I can lose a 100 when I swap batteries,   But other than that, I can’t cut any other weight    What are you guys realistically running for weight of motors and gear ?   A lot of you have 9.9 kickers, right?  They go well over 100lbs don’t they, plus bracket?
1998 15’11” sea explorer. 2002 bf90
 “T roLL on 1”

Offline amazing grace

Re: Pondering a repower of my sea explorer...
« Reply #19 on: June 13, 2019, 11:47:59 AM »
So you got 600lbs in main motor and gas. Batteries are close to 100lbs eachx5. Plus ice, kicker, food and water for three days, people other gear.
That does not = 900lbs
1989 22' C-Dory Angler

Offline Svinny88

Re: Pondering a repower of my sea explorer...
« Reply #20 on: June 13, 2019, 12:00:14 PM »
Optima yellowtop dt34 are 45 lb each.  Rough estimate, on the high side, for engine, fuel, 40lb ice, 5 batteries, and trolling motor.  I did not calculate anything else, this is a constant that the boat will have , other than if I run with less fuel.  Motor is 360, fuel is 170.  Pretty sure that’s 530 lb, not 600lb.   I rounded my numbers up to 900 from 870.
 
What does a 9.9 kicker and bracket weigh?   What do 2 downriggers, bases, and downrigger balls weigh? 

I think if we go to taking the items in our boats , and accounting weights, I don’t think im too far off from a west coast boat with two large batteries, 2 downriggers and a pair of 15# weights plus a spare, with a main and kicker....
1998 15’11” sea explorer. 2002 bf90
 “T roLL on 1”

Offline Svinny88

Re: Pondering a repower of my sea explorer...
« Reply #21 on: June 13, 2019, 12:10:33 PM »
Ok.  So say I go with an f 70.  I can lose 100lb there, and I can lose 100lb  of batteries, swapping to lithium...for the sake of it, let’s say I swap all 5 to lithium.   So now I would have  250lb motor, 75lb in batteries , 170 in fuel, 40 in ice, 80lb trolling motor..   that’s 615lbs   Now add 100lb for downriggers and accessories, and 2 200 lb guys. That’s 1115,  already over befor any fishing gear , food, bait, etc.  I don’t think there is a sea explorer with a four stroke on the water that’s not overweight with 2 guys on board.... anyone have any real numbers on their boat?
1998 15’11” sea explorer. 2002 bf90
 “T roLL on 1”

Offline Omega3

Re: Pondering a repower of my sea explorer...
« Reply #22 on: June 13, 2019, 12:19:35 PM »
Sounds like you need a generator or cover the boat in solar panels.
05 Sea Ranger 19  05 Evinrude 135 DI   17 Yamaha F8

Online Fisherdv

Re: Pondering a repower of my sea explorer...
« Reply #23 on: June 13, 2019, 12:36:23 PM »
Have the MAX HP stickers ever been updated to reflect newer 4-stroke power and 4-stroke weight. Seems the older stickers and the new ones read the same. Many of the stickers on older boats are probably referring to 2-strokes, and not the heavier 4-strokes. If this is the case, then MAX HP motor would be more like 75???
2018 Sea Chaser 16, Honda 60HP

Offline Svinny88

Re: Pondering a repower of my sea explorer...
« Reply #24 on: June 13, 2019, 12:37:53 PM »
Everything is working well, it’s just how much time I can spend on the water   I’ve had this issue with every boat, but I’ve never had a motor with a higher charging capacity. I guess I could just add another battery... to run the livewell pump and the alumaglow lights.... lol.    I do need to cut weight, but I’m wondering what the other sea explorers running four strokes are weighing in at, before people and fishing gear ...
1998 15’11” sea explorer. 2002 bf90
 “T roLL on 1”