The big old 80's 340 owners thread

Does anyone happen to know the oil (Merc 7.4) and tranny fluid (V Drive) capacities?
Headed down to do the work tonight after work and for got the service manual at home
 
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Hi Laurie and Mike,
I have same problem on mine. Where to get replacement parts?
 
Any one ever have this panel in the transom door out?
What is this and why is it there? Asking for no other reason than curiosity....

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it is a knee cushion to avoid hitting yourslf opening or closing the door. By the way...The innards of the door are one of those places that have wood framing the fiberglass that tends to rot. Replaced the wood with pvc pipe that fit perfectly, while still providing a base to screw the outer panel into. Engineer friend came up with the idea. Will last forever.
 
Hi,
I am looking to replace the hinge covers on the wing windows.
Also need new window seals.
 
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Hi,
I am looking to replace the hinge covers on the wing windows.
Also need new window seals.
Taylor has the parts. Have to order thru your local Searay dealer. If Dealer cant find part numbers Ive found the best way to communicate with Taylor is to mail the old parts to them and ask for parts numbers. That always seems to work.
 
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Hi everyone,
I want to install a pot puller and a downrigger on my 340 Sun dancer. My question is should I wire direct to battery or use open breaker for ACCY on power panel? Running 8 ga. to both. Thanks for any info.

Having problems typing on site.
 
You can come off the battery but use a inline fuse for the max amperage the wire's rated for or size the fuse to the device you are going to feed to protect it.
 
You can come off the battery but use a inline fuse for the max amperage the wire's rated for or size the fuse to the device you are going to feed to protect it.

Thanks, haven't been online for a bit, been playing with the boat. Going to hang out on boat over holiday weekend and see if I can get my list of "to do's" done.
 
OH-IO!

Oh ya boat stuff....

Cruise for me is about 3100 RPM and that is wolfing down about 26 gph at about 24 mph shown on the gps

(BTW: hell of a game by the feisty little weasels - good to see that program back with force)
 
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Your fuel consumption isn't really that bad for a 340 DA. A 4hr cruise trip costs little more than 100g gas, done in approx 4 hrs. Very reasonable IMHO.

I wonder the comparable a on the EC which is what I'm really interested in.

Thank you!
 
I cruise my 340 DA at around 2800 rpm and 18 to 20 MPH. I burn about 14 to 16 Gal an hour. I just made a trip to lake Huron and back and that was my average even fighting the current up stream. At that speed I do have to go full tabs but I usually do anyway to keep the bow down. Id say the #'s will be slightly better in the EC because the engines are further forward and you don't have the bow rise as significantly as the DA.
 
I cruise my 340 DA at around 2800 rpm and 18 to 20 MPH. I burn about 14 to 16 Gal an hour. I just made a trip to lake Huron and back and that was my average even fighting the current up stream. At that speed I do have to go full tabs but I usually do anyway to keep the bow down. Id say the #'s will be slightly better in the EC because the engines are further forward and you don't have the bow rise as significantly as the DA.


Thanks. Is there any validity to the claim that vDrives are less efficient and drive at lower speeds and higher fuel consumption vs straight inboards?

early reading averaging 22-24mph @3000-3200 rpm cruise and 24-28 gph. WOT 34-38 mph @ 4000 rpm and 36-40 gph.
 
Thanks. Is there any validity to the claim that vDrives are less efficient and drive at lower speeds and higher fuel consumption vs straight inboards?

early reading averaging 22-24mph @3000-3200 rpm cruise and 24-28 gph. WOT 34-38 mph @ 4000 rpm and 36-40 gph.

ABSOLUTELY! There is torque lost do the the change in direction, friction, and the like. Also having all the weight in the a$$ end the boat is not exactly "balanced" and is less efficient. This imbalance can be overcome with the use of the tabs but this also induces more drag... so less tourque and more drag leads to a slight difference in efficiency.

Jason
 
So here's my question about fuel. I have an '88 349 Sundancer...and my normal trip is a 20 minute idle down a river to lake Erie then a 15 mile run out to where we anchor for the day/weekend, then the return trip. In term of MPG (or NMPG) ...not GPH...is it more efficient running up on a plane (an ya I need full tabs to keep the nose down too) or at about 1500 rpm...just before the stern drops and start plowing? I have looked at test results for smaller boats and the results for both speeds are almost identical, if not slightly better at cruising speed.
I have only owned this boat for 1 full season and unfortunately I haven't made that run enough times to figure it out. I think Garmin GPS and GFS10's might be in my future to see the actual fuel consumption. (ps: anyone interested in a working LC70 setup?..PM me)
We would like to make some longer trips around the lake this year but I would like to try to plan my fuel stops and financing of the fuel in advance.
I have scoured the forums for this answer but can find nothing comparing the two running speeds. If it's been answered then please point me to the post.
 
At 1500rpm it'll take you a long while to get where you're going, but that will yield you over 1.0 MPG (not nautical MPG, statutory). On plane maybe probably btwn 0.7 and 0.8mpg. I had same engines as you on my last boat ('89 340 sedan bridge) and it was equipped with FloScan gauges. At cruising speed (around 3300rpm) I made about 0.7mpg with a wider and heavier boat.
 
so has anyone replaced thier switch and guage panels on the helm ??
all 3 of mine have the corners broken off beside the screws.
any sources ??
I purchased a set from Flounder pounder aka Searay Parts dot com. 300.00 I think.
 

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