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Search took 0.00 seconds. Search: Posts Made By: njensen
Forum: RIBs & ribbing 10 August 2021, 12:39
Replies: 19
Views: 3,717
Posted By njensen
It still a great boat

A few upgrades, and it’s still a great boat :-)
Forum: Engines & props 25 May 2012, 21:55
Replies: 31
Views: 10,659
Posted By njensen
best pitch for my DT65 and SR4.7 was 14"...

best pitch for my DT65 and SR4.7 was 14" (stainless).
16" inch was ok for normal cruising without too much load.
Forum: RIBs & ribbing 08 May 2012, 20:56
Replies: 15
Views: 5,740
Posted By njensen
be careful about thin nylon ropes... they stretch...

be careful about thin nylon ropes... they stretch and it hurts and burns when it breaks. I would not tow a 5 meter rib with anything less than 12-14 mm unless the sea is flat.
Forum: Electrics and electronics 08 May 2012, 11:16
Replies: 13
Views: 2,903
Posted By njensen
Did you charge you battery with radio on or off ?...

Did you charge you battery with radio on or off ?
What kind of charger did you use ?
Forum: RIBs & ribbing 05 May 2012, 21:51
Replies: 28
Views: 9,724
Posted By njensen
I spend a lot of time doing that console/engine...

I spend a lot of time doing that console/engine project. It was fun and cost a lot of money, but i also learned a lot. I also would have done a few things differently, if i were to start over agian.
Forum: Inflatable boats - SIBs and folding RIBs 01 May 2012, 08:31
Replies: 20
Views: 4,483
Posted By njensen
i agree... what's the point of having a safety...

i agree... what's the point of having a safety mechanism which is weaker than rest of the tube. However i do a intermediate pump before final pressure.
Forum: RIBs & ribbing 30 April 2012, 09:22
Replies: 28
Views: 9,724
Posted By njensen
Remember to place it as far back as possible. 35...

Remember to place it as far back as possible. 35 kg on the inside on the transom might not reflect the 35 kg of an engine hanging behind the transom.

Here is a picture of my test setup: (lead...
Forum: RIB gallery 29 April 2012, 20:22
Replies: 478
Views: 216,361
Posted By njensen
i'm quite sure my engine needs to be raised......

i'm quite sure my engine needs to be raised... it's on my todo.

picture of the antiventilationplate @ 20 knots:
https://www.etecownersgroup.com/file?id=1306533


but the viper is made for...
Forum: RIB gallery 29 April 2012, 19:09
Replies: 478
Views: 216,361
Posted By njensen
Like said, top speed is not interesting for me. ...

Like said, top speed is not interesting for me.

15' prop @ 5200 rpm (max for E-Tec 90) is 32 knots....(0% slip)
i got 35-36 knots with my old DT65 Suzuki (16' @5800 rpm).

Speed and hp is not...
Forum: RIB gallery 29 April 2012, 17:43
Replies: 478
Views: 216,361
Posted By njensen
I blocked the flooding hull with a standard...

I blocked the flooding hull with a standard plastic inspection hatch. The frame is just "glued" in with Sikaflex. Front holes blocked with smaller standard drain plugs (frame and threaded plug), also...
Forum: RIB gallery 29 April 2012, 16:14
Replies: 478
Views: 216,361
Posted By njensen
my SR4.7 refitted with E-Tec 90hp in 2010.

my SR4.7 refitted with E-Tec 90hp in 2010.
Forum: Electrics and electronics 27 April 2012, 23:32
Replies: 15
Views: 2,281
Posted By njensen
I really like Lowrance. Have an old LMS350A.....

I really like Lowrance. Have an old LMS350A.. still running after 14 years...

I have been loooking into the HDSx + structure scan as well. Looks very nice.. however i think the HDS7 is a bit small...
Forum: RIBs & ribbing 27 April 2012, 23:21
Replies: 17
Views: 7,830
Posted By njensen
it's a guess.... 1.3-2 liter per NM... my...

it's a guess.... 1.3-2 liter per NM...

my SR4.7 + 65DT Suzuki used about 0.9-1.1 liter per NM.
with my new E-Tec 90 HP it's more like 0.6 liter per NM.
Forum: RIBs & ribbing 26 April 2012, 22:18
Replies: 17
Views: 7,830
Posted By njensen
Speed is not so much about HP. It's more related...

Speed is not so much about HP. It's more related to prop, gearbox, drag and the engine max rpm.

Since my engine is turning 5200 rpm wot @ 32 knots... it can't be too wrong. According to my...
Forum: RIBs & ribbing 26 April 2012, 15:38
Replies: 17
Views: 7,830
Posted By njensen
what is fast ? I get 31-33 knots @ 5200 rpm...

what is fast ?

I get 31-33 knots @ 5200 rpm with a 90 HP E-Tec on my SR4.7 (15" alu prop).
Inititally i tried a 17" alu prop but it only gave me 4900 rpm wot.
33 knots is fast enough for me on...
Forum: RIBs & ribbing 26 April 2012, 15:26
Replies: 12
Views: 2,610
Posted By njensen
check out etecownersgroup.com you'll find lots...

check out etecownersgroup.com
you'll find lots of threads about propping your E-Tec
Forum: RIBs & ribbing 26 April 2012, 14:24
Replies: 28
Views: 9,724
Posted By njensen
I spent 4 years thinking about this issue,...

I spent 4 years thinking about this issue, because i wanted more HP on my 4.7SR. I ended up simulating the "overweighted" transom by adding 45 kg of lead to my A-Frame. I got a little bit of chine...
Forum: RIBs & ribbing 12 October 2011, 12:13
Replies: 9
Views: 3,180
Posted By njensen
Hi, I know mine is not the 5.4M but the 4.7 and...

Hi, I know mine is not the 5.4M but the 4.7 and it could possibly do a big difference. However i placed a 62 liter fuel tank under my console half a meter behind the front tube, and the battery is...
Forum: RIBs & ribbing 01 March 2011, 09:39
Replies: 5
Views: 1,408
Posted By njensen
When i close the flodding hull on my SR4.7 the...

When i close the flodding hull on my SR4.7 the tubes are not even touching the water at rest.
Forum: RIBs & ribbing 10 December 2010, 07:47
Replies: 12
Views: 2,894
Posted By njensen
i just put a 90 HP ETEC on my SR4.7. It weighs...

i just put a 90 HP ETEC on my SR4.7. It weighs 145 KG. I'm very happy about it.

However i did consider it for a long time, and ended up simulating it by adding the extra weight on my a-frame....
Forum: RIBs & ribbing 23 November 2010, 13:32
Replies: 2
Views: 1,648
Posted By njensen
I put a 90 HP ETEC on my SR4.7. The engine weighs...

I put a 90 HP ETEC on my SR4.7. The engine weighs 145 kg.

before i bought the engine i tested my boat adding 40 kg lead on the transom. This way i could simulate the weight impact of upgrading...
Forum: RIBs & ribbing 02 November 2010, 15:55
Replies: 22
Views: 7,548
Posted By njensen
I'm very happy with my Avon SR 4.7 .... and my 90...

I'm very happy with my Avon SR 4.7 .... and my 90 HP E-tec :-)
Forum: Engines & props 31 October 2010, 20:55
Replies: 20
Views: 4,289
Posted By njensen
are you talking ventilation or cavitation ? it's...

are you talking ventilation or cavitation ? it's two different things and requires different actions.

Ventilation is air being sucked down due to bad trim or mounting of the engine.
Cavitatation...
Forum: RIBs & ribbing 19 October 2010, 08:27
Replies: 33
Views: 4,536
Posted By njensen
We (diving club) used to have a Avon 4,2 rib with...

We (diving club) used to have a Avon 4,2 rib with a 40 HP evinrude. Some years ago a prop-shield was mounted on it. It changed the performance of the rig quite much. Top speed, hole-shot and general...
Forum: RIBs & ribbing 18 October 2010, 14:47
Replies: 33
Views: 4,536
Posted By njensen
I think the risk of "accidently knocking it into...

I think the risk of "accidently knocking it into gear" is quite minimal (there is a lock). However i believe it's good practict to shut the engine off to avoid breathing CO just after or before a...
Showing results 1 to 25 of 78
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