Page 1 of 3
TROJAN F 25 (PROP)
Posted: Mon Mar 01, 2010 4:42 pm
by cclark75006
Hello to all: I just bought a 1974 Trojan F25 with Hardtop. Last Saturday, first time to the water, she ran well (but slow) At 2000 rpm, GPS said we were doing 10 to 11 mph. Full trottle she would only do 15 mph at around 2500 rpm. She ran smooth at 2000 rpm, just slow. Is this normal for this boat with 225 HP (Merc ford)
I dont know what prop is on her, I will need to pull her out of the water to tell, but does anyone know what size prop should be on the boat?
Any information would be greatly appreciated.
Curtis
Re: TROJAN F 25 (PROP)
Posted: Mon Mar 01, 2010 5:01 pm
by Paul - SW Ontario
cclark75006 wrote:Hello to all: I just bought a 1974 Trojan F25 with Hardtop. Last Saturday, first time to the water, she ran well (but slow) At 2000 rpm, GPS said we were doing 10 to 11 mph. Full trottle she would only do 15 mph at around 2500 rpm. She ran smooth at 2000 rpm, just slow. Is this normal for this boat with 225 HP (Merc ford)
I dont know what prop is on her, I will need to pull her out of the water to tell, but does anyone know what size prop should be on the boat?
Any information would be greatly appreciated.
Curtis
Should have a 14" x 10 pitch - cupped, or close to.
Should get around 16-17 mph at 2500rpm...23mph at 3000rpm or so.
Not sure what WOT should give you rpm wise, with the Ford.
Posted: Mon Mar 01, 2010 5:14 pm
by vabeach1234
Does it have trim tabs and make sure they are the working properly.
Posted: Mon Mar 01, 2010 5:17 pm
by cclark75006
Hi: Yes, there are trim tabs and they are functioning ok. I would trim the bow down as she was building up speed, so I think that was working fine.
Curtis
Posted: Mon Mar 01, 2010 5:19 pm
by Rodman
I am not sure bout the speed of these boats , I am sure there not speed demons. They were built to cruise not go fast. How fast should one these F26 run?
Posted: Mon Mar 01, 2010 5:21 pm
by cclark75006
OK, should be a 14 x 10, understand. at full throttle she was going 2500 rpm at 15mph. clean bottom, full of fuel and 25 gal of water and 3 big adults. Seems a bit slow.
Posted: Mon Mar 01, 2010 5:26 pm
by prowlersfish
Sounds like the bottom and runing gear need cleaning
Posted: Mon Mar 01, 2010 5:49 pm
by 9rock
prowlersfish wrote:Sounds like the bottom and runing gear need cleaning
that would be my guess first , either way I would pull it if I just bought it and make sure it is clean and propped rite ,
9
Posted: Mon Mar 01, 2010 5:54 pm
by Rodman
How fast does the F26 run at a cursing speed?
Posted: Mon Mar 01, 2010 7:09 pm
by vabeach1234
Rodman,
You and I pretty much have the same boat minus a year, but I have a Chrysler 318. I cruise at around 16 mph and top speed is around 21 to 22 mph.
Posted: Mon Mar 01, 2010 7:09 pm
by MattSC
At 3000 rpm you should be somewhere in the neighborhood of 15kts (17mph) top speed should be in the neighborhood of 24-25 at WOT. Make sure that your throttle cable is adjusted properly and is opening all the way, if it is I would check the prop size. Paul is right on, it should be a 14x10
Posted: Mon Mar 01, 2010 8:05 pm
by foofer b
They aren't fast boats, but built well to last.
Posted: Mon Mar 01, 2010 9:12 pm
by MattSC
When I was repropping , I hit just over 31 knots, which is just a tick over 35mph. It gets a little squirrelly over 25kts as it will start to chine walk a bit. It is a very comfortable and econmical cruise at 17kts which is where I run most of the time.
Posted: Sun Mar 14, 2010 9:14 pm
by braymond
Matt, what size prop did you get when you repropped? What brand did you buy?
I've noticed that mine is always a bit squirrely in a following sea.
Posted: Sun Mar 14, 2010 9:27 pm
by Danny Bailey
A good layer of barnacles on props, shafts and rudders will cut most inboard boats speed by half. Barnacles on the hull will further degrade speed.