The Fishing Website : Discussion Forums : 3700GPH for 2 Tuna Tubes? Really?

The Fishing Website : Discussion Forums : 3700GPH for 2 Tuna Tubes? Really? https://www.fishing.net.nz/forum/ Mon, 01 Jun 2026 06:14:10 +0000 Mon, 22 Jan 2018 20:56:16 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.01 360 https://www.fishing.net.nz/forum/RSS_post_feed.asp?TID=126947 <![CDATA[The Fishing Website : Discussion Forums]]> https://www.fishing.net.nz/forum/forum_images/web_wiz_forums.png https://www.fishing.net.nz/forum/ <![CDATA[3700GPH for 2 Tuna Tubes? Really? : Definitely need the volume of...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715485&title=3700gph-for-2-tuna-tubes-really#1715485 Author: lance@driveline.co.nz
Subject: 126947
Posted: 22 Jan 2018 at 8:56pm

Definitely need the volume of the 3700's. Im in tagits Camp and run 4 tubes with two 3700's.

catchelots statement on longevity is a mystery to me. I do 100's and 10o's of hours of pump use each year and have never had a failure and pumps are now 7 years old.

]]> Mon, 22 Jan 2018 20:56:16 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715485&title=3700gph-for-2-tuna-tubes-really#1715485 <![CDATA[3700GPH for 2 Tuna Tubes? Really? : Most likely they won't be...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715466&title=3700gph-for-2-tuna-tubes-really#1715466 Author: Tagit
Subject: 126947
Posted: 22 Jan 2018 at 7:56pm

Most likely they won't be 600A/H. If they were they would probably be around 200kg+ each. The more common 'big batteries' for house circuits are often around 200A/H. They tend to be around 60kgish per batt in 12v cells from memory. Anyway it sounds like you are plenty well equipped. Just as a footnote most large Yamahas have a twin charging harness which eliminates the need for a VSR. It's about the same price as a VSR probably but saves a bit on the extra cabling.]]> Mon, 22 Jan 2018 19:56:39 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715466&title=3700gph-for-2-tuna-tubes-really#1715466 <![CDATA[3700GPH for 2 Tuna Tubes? Really? : Tagit wrote: edge01 wrote: just...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715461&title=3700gph-for-2-tuna-tubes-really#1715461 Author: edge01
Subject: 126947
Posted: 22 Jan 2018 at 7:47pm

Tagit wrote:

edge01 wrote:

just to jump in here. Ive got a Yamaha xa200 which shows that It has 43amps of charge. I have two large house batteries linked to give 12 volts ( I can never remember which term it is. parallel or in series) . Do you think this would give me enough grunt to run a tuna tube with the 3700? I have two sounders running of them too. A lowrance lxc and a furuno fcv. vhf, stereo ( which I never use)

I run at around 2500 trolling.

Are your house batts 2 x 6v cells or 2 x 12v cells? It is more typical to have 2 x 6v cells in series for a house batt but 2 x 12v in parallel is not unknown either. Series is +ve hooked to -ve between the 2 batteries and parallel is +ve to +ve and -ve to -ve. Check what the label on the house batts say re voltage and A/H's.

If you configure the the pump to run off your house batteries (I assume that your start batt is fully independent?) then worst case you run the house batt down and have to turn off the pump to get some charge back in it. At 2500rpm with a 43amp alternator I would expect that you should be fine running the setup you have plus the 3700.

No I have a totally separate start battery on a vsr. the two batteries are in parallel. I think that the batts are 600 amp hours from memory but I would have to check that to be certain. I know that the start battery is 1000cca. These are big batteries and they are not cheap

]]> Mon, 22 Jan 2018 19:47:43 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715461&title=3700gph-for-2-tuna-tubes-really#1715461 <![CDATA[3700GPH for 2 Tuna Tubes? Really? : Not saying the guy who gave the...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715446&title=3700gph-for-2-tuna-tubes-really#1715446 Author: Alan L
Subject: 126947
Posted: 22 Jan 2018 at 7:06pm

Not saying the guy who gave the advice is wrong - presumably he knows what he is doing. My experience is with mercury/mariner and they are old time engines - simple and robust - 2 strokes i am talking about. And they have had 2 options - high /low as long as I recall. the 50 HP Mariner kept blowing regulators every 2-3 yrs. At some expense. Until they realised it had the high output alternator. problem solved. 2 different colours under the flywheel. to think a manufacturer would limit themselves as late as 2009 to low output is hard to figure. My Mariner was 90's.

regards

Alan

]]> Mon, 22 Jan 2018 19:06:54 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715446&title=3700gph-for-2-tuna-tubes-really#1715446 <![CDATA[3700GPH for 2 Tuna Tubes? Really? : Might have been manufactured in...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715443&title=3700gph-for-2-tuna-tubes-really#1715443 Author: Tagit
Subject: 126947
Posted: 22 Jan 2018 at 6:54pm

Might have been manufactured in 2009 but it was probably designed in the 1990's, or maybe even core design back in the 1980's.]]> Mon, 22 Jan 2018 18:54:11 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715443&title=3700gph-for-2-tuna-tubes-really#1715443 <![CDATA[3700GPH for 2 Tuna Tubes? Really? : seriously? That's weird.if...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715442&title=3700gph-for-2-tuna-tubes-really#1715442 Author: Alan L
Subject: 126947
Posted: 22 Jan 2018 at 6:46pm

seriously? That's weird.

if not, then you are a bit screwed. 2009 Yamaha 90? Most manufacturers offer at least 2 options.

I would get a 2nd opinion.

Regards

Alan

]]> Mon, 22 Jan 2018 18:46:18 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715442&title=3700gph-for-2-tuna-tubes-really#1715442 <![CDATA[3700GPH for 2 Tuna Tubes? Really? : Alan L wrote:That Shurflo 2000...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715438&title=3700gph-for-2-tuna-tubes-really#1715438 Author: BeastMode
Subject: 126947
Posted: 22 Jan 2018 at 6:22pm

Alan L wrote:

That Shurflo 2000 only uses 10A according to specs. With an upgraded charge system you will bolt in. I recently parted with an older Mariner 50 that had a 30A charge system. It was an upgrade from the basic unit. But I expect most if not all 90HP motors would be upgradeable to around 30A and maybe a bit more.

Alan

Cheers. Spoke with someone today that said my motor couldnt be upgraded Cry

]]> Mon, 22 Jan 2018 18:22:15 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715438&title=3700gph-for-2-tuna-tubes-really#1715438 <![CDATA[3700GPH for 2 Tuna Tubes? Really? : That Shurflo 2000 only uses 10A...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715415&title=3700gph-for-2-tuna-tubes-really#1715415 Author: Alan L
Subject: 126947
Posted: 22 Jan 2018 at 4:09pm

That Shurflo 2000 only uses 10A according to specs. With an upgraded charge system you will bolt in. I recently parted with an older Mariner 50 that had a 30A charge system. It was an upgrade from the basic unit. But I expect most if not all 90HP motors would be upgradeable to around 30A and maybe a bit more.

Alan

]]> Mon, 22 Jan 2018 16:09:42 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715415&title=3700gph-for-2-tuna-tubes-really#1715415 <![CDATA[3700GPH for 2 Tuna Tubes? Really? : Looks like 90 Etec is over 20amps...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715378&title=3700gph-for-2-tuna-tubes-really#1715378 Author: Tagit
Subject: 126947
Posted: 22 Jan 2018 at 11:28am

Looks like 90 Etec is over 20amps charging at 2500rpm and provides up to 45amps of usable charge at WOT. Bit different to the old 2 stroke Yammie at 10amps max. Charging rates on outboards are all over the place depending on the manufacturer. Only reasonably sure thing is that later designed engines will probably have bigger alternators than earlier designs as the amount of electronics on boats has increased immensely.]]> Mon, 22 Jan 2018 11:28:22 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715378&title=3700gph-for-2-tuna-tubes-really#1715378 <![CDATA[3700GPH for 2 Tuna Tubes? Really? : Gidday BMI have a Shurflo 2000gph...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715376&title=3700gph-for-2-tuna-tubes-really#1715376 Author: RH580ikanui
Subject: 126947
Posted: 22 Jan 2018 at 10:53am

Gidday BM

I have a Shurflo 2000gph 12v running on my 5.5 surtees with 90 etec. Runs 2 tubes plus my live bait tank piece of piss.

http://shurflo.com/marine-products/livewell-pumps/shurflo-high-flow-livewell-pumps/60-shurflo-livewell-2000-12-vdc

I bought mine from Walmart out of the states. Heaps cheaper than buying one here.

I prefer this type as it has an inlet pipe rather than a scavenge setup like a bilge pump.

Mounted mine on a bracket with just the inlet hosetail protruding below the hull. works a treat,

]]> Mon, 22 Jan 2018 10:53:53 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=126947&PID=1715376&title=3700gph-for-2-tuna-tubes-really#1715376