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Questions about 318 by new owner

D

dbatopsecret

New member
"I just bought a '77 Troja

"I just bought a '77 Trojan 30 with twin chrysler 318's. On the sea trial, we got a max of 2200 rpm, on both engines, with a top speed of 9.5 to 10 kts. All else with the craft was acceptable, price considered, so I bought it. Original props. I have read this forum quite a bit in the 3 weeks since I bought it. My question is, when you start the motors, how long should you wait to see water flow in the exhaust. I am afraid of waiting too long and damaging motors. Also, when checking timing advance, should this be done under load?"
 
"those motors should spin up t

"those motors should spin up to at least 4000 rpm with a speed in excess of 30 mph, as for the water from the exhaust?, you should see some within 30 seconds, depending on what kind of mufflers the boat has you might hear the exhaust note change, mine take a few seconds to fill with water then the exhaust gets a little quieter, timing is best done with a light with advance adjustment, can be done at the dock, you need to make sure your getting the full distributor advance"
 
"Was that boat in the water al

"Was that boat in the water all summer? If so, it could have a bottom and props coated with slime and barnacles. Way too slow.

Frankly, I wouldn't have touched it unless it could at least plane off and make 3,000 rpms.
You might have bought trouble, there, pardner.

Jeff"
 
"Kent congrats on the new purc

"Kent congrats on the new purchase. I have 32' Trojan 1978. I have had good luck with my twin 318's. I agree with Jeff alittle slow, I'd have a look underneath her. As far as the water. I agree with Peter, mines the same way after a few seconds water should be out the exhaust. It will change also when more water enters, for ex when the thermos open up. Mine even sounds better then.318's are tuff just rem liquids, liquids liquids..... they needs that. Enjoy when you do get her in
Vernon"
 
"Thanks Gentlemen, For the pri

"Thanks Gentlemen, For the price, if she never left the dock, she's a fine floating cabin!! She had a new bottom job, cleaned props, and a hull survey this past July. Also had new interior upholstry, headliner, floors, etc this summer. A/C is new this summer, nice and cold. I've replaced a few bulbs and corroded elec. connections. }I'm gonna tweak the motors, new plugs, wires, filters, timing, etc. and see what I come up with. I may repower her, if needed... I'll still be good on the overall cost."
 
"Okay. From what you said, I&#

"Okay. From what you said, I'm convinced that your distributors are not advancing the spark. You can check this with a timing light: Buzz the motors to 3,000 rpms and see if the mark moves. It should move dramatically, then RETURN to the initial 5' BTDC position. If (when) it doesn't, do this:

1. Remove the distributor cap and rotor.

2. Put a few drops of light oil right below the rotor, followed bu a squirt of penetrating oil.

3. Reinstall the rotor, then put a song on the radio.

4. Exercise the the rotor by moving it back and forth, back and forth, back and forth until the entire song has ended. Don't cheat! Do it for several minutes.

5. Reinstall the cap and fire her up.

It's common for the advance mechanism of these engines to stick over time--mine did it over one winter. The Fastjeff Repair Method should cure it.

Jeff"
 
"Sweet,,,,, Thanks for that Je

"Sweet,,,,, Thanks for that Jeff. I will be trying that this weekend. Mine will not go over 3K. If that fixes my motors I will mail you a beer. But only one !!"
 
"I am AMAZED that y'all do

"I am AMAZED that y'all don't charge for this. Thanks Jeff. I'm probably gonna check this out tonite. I think a gentleman earlier mentioned using a certian timing lite with advance?

I still have a fear about water flow. How much water should you see from the exhaust? Like a gurgle splash, or a stream? My exhaust pipes are about 1/2 below the waterline.

Is the only impeller right at the water pump on the motor? Or is there another impeller before there? I'm tempted to replace just for better sleep at nite. I put water PRESSURE gauges on the outboards on my fishing boat, and felt alot better about that. My new purchase only has water TEMP gauges.}}"
 
"David: Let me know how you m

"David: Let me know how you make out.

Top: With the exhaust half buried like that you can't expect to see much flow. Mine are not and I see a stream about an inch in diameter.

After frying a motor years ago when the water flow got cut off, I designed and installed low water pressure alarms (sound familar?) for both motors. Now, I never plane off without first clicking the sweitches on and listening to the beep! go away as the rpms rise above 2,000.

Jeff

PS: I have details if anyone is interested."
 
"Here's a video link:

[

"Here's a video link:

http://s23.photobucket.com/albums/b393/Fastjeff/?action=view&current=LWPAlarm-SlipTest.flv

And here's schematic:

295118.jpg


Jeff"
 
"Well, Jeff, I cozied up to my

"Well, Jeff, I cozied up to my 318's with a timing lite and new plugs and wires this afternoon. I found the indicator bar for timing to be rusted off both motors. The line was visible on one flywheel (port) and the other wheel (stbd) was quite rusted. I didn't turn it to find the line.

I'll be thinking towards repowering and will start a new thread. I think this has been a great thread, thanks for all y'alls input!!"
 
..."I found the indicator

..."I found the indicator bar for timing to be rusted off both motors"

Did you look for the other timing pointer at the flywheel (below a rubber flap held by a 1/4 inch bolt)?

Jeff
 
""And here's schematic

""And here's schematic:"

Jeff,

I'm interested in your switch setup, however I think that I'd prefer a gauge as well as the audible. What is the pressure range? Low psi, or inches of H2O?

By the way, your enginges sound sa-weeeet!

Thanks, Noel."
 
"Thanks. 0 to 15 psi will han

"Thanks. 0 to 15 psi will handle the water pressure.

Jeff

PS: Since one of my engines (raw water cooled) destroyed itself in under 30 seconds when the water was cut of (reason never determined), this is why you need an audible alarm. Even me--annal as I am at eyeballing the gages--could miss it."
 
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