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Old 04-14-2020, 07:03 PM   #81
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Completely foreign to us over here. We are all about the Interlux and Pettit products. Maybe we are using consumer grade stuff? I will say the Pettit Trinidad Pro is good stuff but it is not cheap. And we usually rate our paints in percentage of concetration and not parts per liter. I think Pettit Trinidad is 60% Copper....
The beauty of the metric system is ease of use.
764 g/litre is pretty much 76.4%

Top pic was this year after 18 mths and dived about 2 mths prior

Bottom pic was the time before and was dived about 4 mths prior
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Old 04-14-2020, 07:44 PM   #82
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The beauty of the metric system is ease of use.
764 g/litre is pretty much 76.4%
That is good stuff!!! And I didn't know grams and milliliters were the same in this application....one being weight, and the other volume. Now you are getting into the English way of doing things...."fluid" grams???!!!

I mean seriously, that assumes everything in the bucket weighs exactly the same for the volume that they displace....and I seriously doubt that with copper. Is this a correct statment?? I thought the purpose of the metric system(other than simplicity of tens) was to keep units of weight and units of volume separate....whereas the English systems struggles with that....hence "fluid ounces" versus the weight of an ounce.
"Solids be weight" of That Trinidad is 84%. Now whether all of those solids are copper, I do not know. But something tells me that is the case.
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Old 04-14-2020, 07:57 PM   #83
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The beauty of the metric system is ease of use.
764 g/litre is pretty much 76.4%
Us Americans don't need no stinkin' metric system.

We resisted and fought off the metric system in the 70's only to have it sneaked into our lives slowly.
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Old 04-14-2020, 11:12 PM   #84
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Us Americans don't need no stinkin' metric system.

We resisted and fought off the metric system in the 70's only to have it sneaked into our lives slowly.
100 cents to a US dollar - that's pretty metricish
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Old 04-14-2020, 11:28 PM   #85
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100 cents to a US dollar - that's pretty metricish
Sneaky SOB's
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Old 04-19-2020, 07:25 PM   #86
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7 days for us to Wash/buff/wax/fix exhaust pipe leaks, fab and install new swim step brackets. Strip one side and the aft, prime and 3 coats of paint. Maiden shake down run was from Everett-Seattle and back so about 110 NM and 75 gallons of fuel doing a solid 17kt each way. And today was about another 35 miles from Everett to Honeymoon bay and back. But we took it slow at 12kt and only 35 gallons.
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Old 04-19-2020, 07:56 PM   #87
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Few more
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Old 04-19-2020, 08:01 PM   #88
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Nice looking Egg Harbor.

I always liked the lines on East Coast boats like Egg Harbor, Pacemaker and lobster boats like Wilburs.
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Old 04-19-2020, 08:07 PM   #89
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You started bottom painting at the wrong end this time! Reverse direction is always slower in a boat!!
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Old 04-19-2020, 08:44 PM   #90
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7 days for us to Wash/buff/wax/fix exhaust pipe leaks, fab and install new swim step brackets. Strip one side and the aft, prime and 3 coats of paint. Maiden shake down run was from Everett-Seattle and back so about 110 NM and 75 gallons of fuel doing a solid 17kt each way. And today was about another 35 miles from Everett to Honeymoon bay and back. But we took it slow at 12kt and only 35 gallons.
Are you sure your fuel consumption figures are correct. 110 NM at 75 gallons equals 1.46 NM/gallon doing 17 knots. Doing 12 knots you only got 1 NM/gallon. Is that correct?

BTW, the boat looks great!
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Old 04-19-2020, 08:56 PM   #91
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35 miles and back....
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Old 04-19-2020, 09:01 PM   #92
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Are you sure your fuel consumption figures are correct. 110 NM at 75 gallons equals 1.46 NM/gallon doing 17 knots. Doing 12 knots you only got 1 NM/gallon. Is that correct?

BTW, the boat looks great!
It wouldn't shock me if he's nicely on plane at 17 kts and plowing at 12.
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Old 04-19-2020, 09:06 PM   #93
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It could be and it also could be that the second trip was 70 NM, then the fuel consumption would look better. I just took it as it was 35 NM there and back total.
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Old 04-19-2020, 10:13 PM   #94
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It could be and it also could be that the second trip was 70 NM, then the fuel consumption would look better. I just took it as it was 35 NM there and back total.
A quick look at the chart helps. There and back should be close to 70nm.
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Old 04-20-2020, 10:53 PM   #95
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Ron,

Check the yard where you are planning to have the boat pulled. The yard where I have the work done charged me about $1,400 total including tax, taping, paint, cleaning the bottom, pulling and splashing the boat and lay days. During that time I was able to do some other projects such as changing zincs. Personally unless you are into it the difference in cost wasn't worth it for me to do it unless I was able to get the boat pulled and there was no charge for lay days.
What yard is that? We are next to Anacortes Marine Services and I think they are more than that.
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Old 04-21-2020, 06:37 AM   #96
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Nice work Ron,
Here’s a random question for you (right of of left field). “Bottom paint”, do it yourself or hire a pro ?
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Old 04-21-2020, 09:15 AM   #97
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Nice work Ron,
Here’s a random question for you (right of of left field). “Bottom paint”, do it yourself or hire a pro ?
If your able, do it yourself. If your not, hire it out.
I saved a fair chuck of cash doing it myself, but we are also in one of the most costly areas to hire work out.
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Old 04-21-2020, 09:36 AM   #98
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Are you sure your fuel consumption figures are correct. 110 NM at 75 gallons equals 1.46 NM/gallon doing 17 knots. Doing 12 knots you only got 1 NM/gallon. Is that correct?

BTW, the boat looks great!
Thank you


Pervious info is wrong, I wrote it down, but did not bring the info home with me.

Two separate trips, first trip was 75 gallons of gas running around 17 kt for an average in a light chop. Total trip per the gps was 66.8 miles so what 1.12 gallons per mile?

Second trip was 63 gallons at 33 miles so 1.9 and yes we were doing going between 9-12kt and it plows at that speed, water was nice and flat! But we were just going for a nice slow ride.

I'm still playing with the trim tabs and trying to find the sweet spot of comfort/speed/economy. The boat's trim tabs never worked before, so this is all new to me. If I push the bow about 1/2 down it picks up speed on-step and the engine rpm goes up about 300-500rpm without touching anything. If I push it down all the way the boat slows down about 2kt and we spay up over the bow and its difficult to keep on track as it wonders p/s easy and takes a lot of effort to keep on track. If I am on-step and retract the tabs all the way the bow rides up about 4' and we lose speed for a given rpm.


Right now to reach on-step fast I push the trim tabs all the way down, bring the engines to 3000rpm and once it gets up out of the water I back the tabs down 1/2 way and bring the rpm's back down to 3000 as once its up the rpm's will go to 3300-3500.

I would also like to know hull speed and plan a trip at that speed to see what kind of range I can obtain. I'm thinking 7-8? 33'x about 12'


The boat will plain at 12.5 but it takes a lot of power to stay at that speed, if I bring it up to 13.5 I can back down on the gas.

Looks like 14-15kt will be the sweet spot, up ontop of the water but still under 3k rpm ( about 2750rpm). Boat weighs about 17,000 dry (according to the yard travel lift). We then added 200 gallons of gas and 35 gallons of water + a family of 4.
33' long and powered by two chev 350's that have about 425 hours each on the clock since new, has velvet drives that were also rebuilt at the same time as the engines were replaced. The stock props are on the shelf at home, I think the PO added larger props but the lock nuts cover the stamping. The only reason I say this is my max rpm is 4000, some other egg owners claim they can get to 4500 rpm but we end up doing about the same top speed.

The boat has dual fuel scans but I am unsure of how they work, most often they are reading 1.5-2 (2000-3000 rpm), but the total gallons never adds up to what I use. For instance it says for our two trips combined I used 35 gallons.
I think this reads gallons per hour, not gallons per mile. If I floor it and run it up to 4,000 rpm's the fuel scans will read 10 per engine. All I know is I don't trust them at this point and need to find more info on them. As at 3000 rpms and 17kt I think its close to 22 gallons per hour.
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Old 04-21-2020, 09:46 AM   #99
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How big are your trim tabs? Going by the pictures, I'm going to guess they're either 24x9 or 30x9, so maybe a hair small, but nothing terrible. Going to wider span (covers more of the transom) tabs will let you run with them dropped to a smaller angle which gives less drag for a given amount of lift and will save you a little bit of fuel.

For my slightly stern heavy boat with big (48x12) tabs, I usually guesstimate (by time pressing buttons) the tabs to about where they'd need to be while on plane (about 1/3 of the way down or a hair less). Then throttle up and she climbs up on plane nice and smoothly. Once the boat stops accelerating, tweak the tabs to find best speed unless sea conditions require otherwise (trim down further in a head sea, up further in a following sea for ride comfort and handling at the expense of speed). I've never found a reason to drop the tabs all the way.

For an efficient slow speed cruise, you probably don't want to exceed 6.5 kts (estimating based on a 30-ish foot waterline length). With a 33.5 foot waterline length, I consider my slow cruise to be around 6.5 - 6.8 kts. I can push it to a little over 7 easily enough, but fuel burn and wake production definitely start to climb at that point.

Propped to turn 4000 at WOT, assuming you have Quadrajets or other vac secondary 4 barrels on your 350s, most efficient cruise will probably be somewhere in the 2900 - 3200 range. Re-propping to get WOT up to 4200 - 4400 may save you a little fuel up on plane, as it'll be easier to get to a speed where you're fully up on plane without getting into the secondaries.

Based on what you've said, it sounds like your fuel flow meters are either malfunctioning or just way out of calibration.

With small blocks, as a safe estimate based on the numbers you've given, I'd expect (for planning purposes) somewhere around 0.7 - 0.9 nmpg on plane, probably around 1.5 - 1.6 nmpg at low speed, maybe closer to 2 nmpg if you're lucky. With my fuel sucking big blocks in a somewhat bigger, heavier boat, I figure 0.5 - 0.6 nmpg on plane, about 1.2 at 6.5 - 7 kts.
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Old 04-21-2020, 09:47 AM   #100
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This is the first time in about 5 years this boat has gone this far. I started out with new fuel filters, but think it would be wise to swap them out now that I have ran a fair bit of fuel through them.
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