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Search took 0.00 seconds. Search: Posts Made By: jimisbell
Forum: Engines and Propulsion Systems 22-11-2006, 08:30
Replies: 87
Views: 11,631
Posted By jimisbell
OK, my last post was just a tease to get everyone...

OK, my last post was just a tease to get everyone listening...#8-)

As this forum started I described my overheating problems and we discussed the possibilities and I made some changes. The...
Forum: Engines and Propulsion Systems 21-11-2006, 19:39
Replies: 87
Views: 11,631
Posted By jimisbell
The overheating problem is solved!!!

The overheating problem is solved!!!
Forum: Engines and Propulsion Systems 15-11-2006, 08:54
Replies: 87
Views: 11,631
Posted By jimisbell
Thats a good datapoint. My boat is a Gulfstar 36...

Thats a good datapoint. My boat is a Gulfstar 36 at 18,000 lbs.

I just got back from the prop shop and they say the 19x18 that I just took off the boat isnt worth repitching so it will become a...
Forum: Engines and Propulsion Systems 14-11-2006, 20:16
Replies: 87
Views: 11,631
Posted By jimisbell
Its already been repitched. That was my spare...

Its already been repitched. That was my spare prop. That was done at the root of the blades. There is enough NOW, but not enough to take much away.

There is plenty of clearance. Enough for...
Forum: Engines and Propulsion Systems 14-11-2006, 17:14
Replies: 87
Views: 11,631
Posted By jimisbell
I will start a new thread on this copper coating...

I will start a new thread on this copper coating idea. This is the wrong place to discuss it. Ill bet there is a good reason it has never been done.
Forum: Engines and Propulsion Systems 14-11-2006, 13:16
Replies: 87
Views: 11,631
Posted By jimisbell
I am qurious, do you think they could put coper...

I am qurious, do you think they could put coper over bronze so it would have an anti fouling surface? Bronze ciontains coper so it should be possible and a 10 mill coat of copper would solve the...
Forum: Engines and Propulsion Systems 14-11-2006, 12:08
Replies: 87
Views: 11,631
Posted By jimisbell
Oh yes, the guy at the prop shop suggested that...

Oh yes, the guy at the prop shop suggested that I donnt pollish it. He said he didnt want to sand it because "You dont have much metal there now, you dont need to remove any of it."
Forum: Engines and Propulsion Systems 14-11-2006, 09:20
Replies: 87
Views: 11,631
Posted By jimisbell
Alan, Heres the data you have been wanting...

Alan,

Heres the data you have been wanting to hear.

I scratched the crap off the prop and it is a 20x18 that has been clipped to 19x18. WAY over proped. That is the overheating problem right...
Forum: Engines and Propulsion Systems 13-11-2006, 20:41
Replies: 87
Views: 11,631
Posted By jimisbell
I have some EP-ZO vinal anti fouling paint that...

I have some EP-ZO vinal anti fouling paint that uses Zinc Omadine for the toxic component..no copper or tin...so its compatable with bronze props and it is for bottoms up to 30 MPH. At 900 shaft RPM...
Forum: Engines and Propulsion Systems 13-11-2006, 15:12
Replies: 87
Views: 11,631
Posted By jimisbell
Thanks. That seems to indicate that the pump...

Thanks. That seems to indicate that the pump which was new was faulty from the factory.

Well, we hauled Isabella today and the bottom was clean as a whistle but the prop was covered with all...
Forum: Engines and Propulsion Systems 12-11-2006, 07:34
Replies: 87
Views: 11,631
Posted By jimisbell
If you can send me a picture of the back of your...

If you can send me a picture of the back of your alternator I may be able to show you what I did.

Looking into the back of my alternator there was an opening in the case thru which I could see the...
Forum: Engines and Propulsion Systems 11-11-2006, 16:15
Replies: 87
Views: 11,631
Posted By jimisbell
I think its reasonably tied up...BUT if it came...

I think its reasonably tied up...BUT if it came loose I would rear end my other boat. That might not be easy to explain to the insurance company. Soooo, I think I will wait until Mondy in open...
Forum: Engines and Propulsion Systems 11-11-2006, 15:18
Replies: 87
Views: 11,631
Posted By jimisbell
Got the tach repaired today and now I know that...

Got the tach repaired today and now I know that with no load the range of the throttle is 600 to 4000 RPM. It might have gone higher but at 4000 it was scarry so I shut it back down...#8-) Thats a...
Forum: Engines and Propulsion Systems 10-11-2006, 20:03
Replies: 87
Views: 11,631
Posted By jimisbell
On monday I will haul out. and check the prop...

On monday I will haul out. and check the prop pitch if that is OK then the freshwatrer pump comes off!! Thanks for the comments. Up till now I had not heard of anyone having a problem with the...
Forum: Engines and Propulsion Systems 09-11-2006, 19:57
Replies: 87
Views: 11,631
Posted By jimisbell
I took the 18x18 prop to the shop this afternoon...

I took the 18x18 prop to the shop this afternoon and he says he might be able to get it to 18x13 but he isnt sure but he will see what he can do. I think if he gets it to 18x14 I will be happy. ...
Forum: Engines and Propulsion Systems 09-11-2006, 19:53
Replies: 87
Views: 11,631
Posted By jimisbell
Its a real motorsailer, a 1972 Gulfstar 36 Center...

Its a real motorsailer, a 1972 Gulfstar 36 Center Cockpit.
Forum: Engines and Propulsion Systems 09-11-2006, 11:42
Replies: 87
Views: 11,631
Posted By jimisbell
Since I am using my boat as a motordsailer and...

Since I am using my boat as a motordsailer and the emphasis is on MOTOR wount a 3 blade prop be more efficient??

I got the Tach working....ALMOST.

Its an alternator driven tach and it seems...
Forum: Engines and Propulsion Systems 09-11-2006, 10:52
Replies: 87
Views: 11,631
Posted By jimisbell
I sure hope you are right because that will be an...

I sure hope you are right because that will be an easy fix. If that is the problem, and I am beginning to think it is in spite of my propcalc program, it will mean I have one of the best cleaned,...
Forum: Engines and Propulsion Systems 09-11-2006, 06:58
Replies: 87
Views: 11,631
Posted By jimisbell
I keep forgetting to mention that I have a 3...

I keep forgetting to mention that I have a 3 bladed prop....I think.....that is what the PO reported to me when I bought the boat. I didnt ask the diver that inspected the bottom at the time of...
Forum: Engines and Propulsion Systems 08-11-2006, 20:37
Replies: 87
Views: 11,631
Posted By jimisbell
I am not sure what the RPM is as the Tach has not...

I am not sure what the RPM is as the Tach has not been running properly, off and on. Tomorrow I am going to fix that so I can get accurate information on the RPM.

But based on the discussion as...
Forum: Engines and Propulsion Systems 08-11-2006, 18:38
Replies: 87
Views: 11,631
Posted By jimisbell
So, just what do you think the pitch should be? ...

So, just what do you think the pitch should be?

I dont know yet what the pitch is on the installed prop that I will find out on Monday when she is hauled out.

The "spare" that was in the engine...
Forum: Engines and Propulsion Systems 08-11-2006, 14:16
Replies: 87
Views: 11,631
Posted By jimisbell
OK, that sounds good, but just for grins,...

OK, that sounds good, but just for grins, consider this...you could cool it with evaporating freon and run ice water in the passages, BUT...wouldnt that hurt the engine if you were taking 150 HP off...
Forum: Engines and Propulsion Systems 08-11-2006, 14:09
Replies: 87
Views: 11,631
Posted By jimisbell
In this case the drive is 2.57:1 and the 18x18 is...

In this case the drive is 2.57:1 and the 18x18 is close to correct according to the formulas I am using. The wright is 18,000 lbs and the wl is 34 and the beam is 12 feet.
Forum: Engines and Propulsion Systems 08-11-2006, 06:54
Replies: 87
Views: 11,631
Posted By jimisbell
Wheels, The reason I was concerned about...

Wheels,
The reason I was concerned about offending someone was that I posted a similar list on another forum in Boat Design and one person flamed me for being a smart A** so I didnt want anyone to...
Forum: Engines and Propulsion Systems 06-11-2006, 13:50
Replies: 87
Views: 11,631
Posted By jimisbell
To start, nothing I say below is to, in any way,...

To start, nothing I say below is to, in any way, belittle the offerings of suggestions from anyone on this thread. I am greatful for all the help. I just want to make a clean report on what did and...
Showing results 1 to 25 of 40
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