|
Diablo 3.0 Power Options
So I am on my way home with my new to me 1993 Diablo 180. I didn't sea trial her so my only real concern is how well does the 3.0 move her? Are there any little tricks to increase performance?
:) |
Re: Diablo 3.0 Power Options
Well , your looking at 135hp and around 40-44 mph at sea level. Not anything you can do to it except prop. You could do porting , overbore ,, etc. But if your going to spend that kinda money , repower with a 4.3LX(205hp) power package..
Good reliable motor , but it ain't no powerhouse. Just have fun with it and laugh at everybody filling up at the marina every day! :) You got you a fun and stable boat!! Larry |
Re: Diablo 3.0 Power Options
Quote:
|
Re: Diablo 3.0 Power Options
Where you at Gin? Elevation?
Larry |
Re: Diablo 3.0 Power Options
Quote:
|
Re: Diablo 3.0 Power Options
Sounds like a great setup for you. Just maintain her and you'll have no worries and lots of fun :)
Larry |
Re: Diablo 3.0 Power Options
I took her out today and was a little let down with WOT around 4900 RPM, according to the gauge, and 32 MPH, according to a very reliable Droid speedo ap. Would really like this to be more like 4700 and 42!!!!
|
Re: Diablo 3.0 Power Options
You need to look at what size prop you got Gin. You can probably pick up a little more with a prop that has another 2 in pitch. But , your gonna loose everything on the bottom end.
Check the ID on the outdrive. Make sure it is a 3.0 drive. Do a compression check on the motor. Did it make any weird noises when you had it out? Especially while turning? Something is fishy. She outta run 40 easy I would think. Larry |
Re: Diablo 3.0 Power Options
She sounded great. A few peculiar things did happen though. When I started her on land for the first time in two days she started up first try and ran strong. I filled up with fuel then launched her. Ran the blower for a minute and went to start it. She sounded like the battery was near dead. I turned the blower off and got more juice out of her and she eventually fired up. Then while under way I tried the blower and she immediately sarted to die so I turned it off and she recovered. No issues when I put the bilge pump on, just blower. Ran her for about 15 minutes around 3500 RPM w no problems. Took her to WOT for a minute or so, no problems. Ran around 4500 for another 5 mins or so, no problems. Then went to WOT and the temp gauge went from 160 to like 200 so I took her down to trolling speed. Noticed a little smoke in the bilge which looked to be coming from either the carb or manifold areas. She quickly recovered back to around 160 and we called it a day. Hummmmmmmmmmm
|
Re: Diablo 3.0 Power Options
SMOKE??? not good.... I wouldn't be too concerned with the temp getting high wen under that high level use for a while but smoke..... Never!
|
Re: Diablo 3.0 Power Options
Engine coupler toast maybe? Did it smell like rubber?
That is really strange! Larry |
Re: Diablo 3.0 Power Options
I have t0 take a closer look at the engine. She's been sitting for nearly two years on the hard uncovered. I wonder if there was some "crap" that found its way on top the manifold and when temps rose it caused a little smoke? I've been so focused on rubbing the paint out and making her perty that I have not spent the time I should have inspecting everything in the bilge. The purpose of the first trip out was just to get an overall idea of how she runs. Clearly I have some work to do.
|
Re: Diablo 3.0 Power Options
Quote:
|
Re: Diablo 3.0 Power Options
After searching and reading about engine couplers it sounds like you hit the nail right on the head. However I never experienced any of the symptoms other than the sudden increase in temperature, smell and some smoke. I never had the feeling of a free spinning prop of high RPMs and low speed. Everything operated as it should. But then again I backed her down and crawled back in at trolling speed once this happened. How can I tell if it is in fact the coupler while she's on the trailer in my driveway?
|
Re: Diablo 3.0 Power Options
Look on top of the back of the engine , you might have to use a mirror. At the very back of the bell housing towards the stern , you'll be able to see the the driveshaft running from the outdrive bell housing to the motor bell housing. It's like a inspection port.
Start the engine with your muffs on. Put it in forward gear use the mirror and see if you have any wobble. Here is a pic of it. http://i271.photobucket.com/albums/j...ment_image.gif If it is wobbling you probably have a issue with the coupler or alinment of the drive. Check out this site , it has lots of info! :) http://www.sterndrives.com/sitting_engine.html Larry |
Re: Diablo 3.0 Power Options
I didn't have a mirror but I did run it and check it out as closely as I could with the naked eye. The motor mounts are very solid and no movemebt of the engine or driveshaft from what I could tell. Didn't see any rubber shards anywhere. I did find that there was a purple wire, see pic, that was disconnected right where I noticed the little bit of smoke. I am researching what the wire is and if that could have been the issue.....
http://i998.photobucket.com/albums/a...A/IMAG1492.jpg http://i998.photobucket.com/albums/a...A/IMAG1498.jpg |
Re: Diablo 3.0 Power Options
Read that the solid purple is for ignition. Could it be that is was loose and came off when at WOT and exposed the contact at the manifold and got hot and smoked????
|
Re: Diablo 3.0 Power Options
Any thoughts? Looking to go out today and give her a try. Just don't want to get stuck out. I ran her for 5 minutes with muffs on and good temp, no smoke or smell. ???
|
Re: Diablo 3.0 Power Options
No guts ....No glory Gin! :)
Keep a close eye on gauges. I got to thinking about the smoke and the poor performance. Watch and see if your getting blowby from the valve cover breather hose. That could be where the smoke is originating from. If so , definately run a compression check on the motor. Heck , I would anyway. Good luck!! Larry |
Re: Diablo 3.0 Power Options
Thanks Larry. I went to do a compression test yesterday and the plugs although easy to access are deep in so I need to get a deep socket. Maybe I will do that this morning and do a compression check first. I guess I can have the admiral at the helm while I keep an eye on the engine to see how she is and if smoke starts where it's coming from. I am in the Coast Guard Auxiliary and can have my mates come get me should she die but would love to spare some major harassment if able. LoL
|
Re: Diablo 3.0 Power Options
I know the feeling :)
Just take the cover off the carb so you can watch the hose where it connects to the flame arrestor. If you have another stint of getting warm , pull the thermostat when you get her home and make sure it isn't sticking. Did you change the fuel filter yet? If not do it. Larry |
Re: Diablo 3.0 Power Options
I didn't change the fuel filter but I removed it and poured the gas from the filter into a container yesterday. Going to check it now.
|
Re: Diablo 3.0 Power Options
If you can't blow thru it easy it needs replaced.
Let us know how it goes! And above all else........enjoy the afternoon on the water Larry |
Re: Diablo 3.0 Power Options
|
Re: Diablo 3.0 Power Options
Well we didn't make it out today due to some bad storms rolling in so I continued my hull wet sanding just above the waterline. Uggg
Read through the Mercruiser owners manual and found out that the 3.0L is rated at 115HP. That could explain the lack of power. |
Re: Diablo 3.0 Power Options
I have a 180 Diablo with a 3.0 L engine. At 4600 RPM (highest recommend for the engine) it will get 38 MPH and at WOT (about 5100RPM) around 42 MPH with a 19 inch prop. With a 21 inch prop I would think the 40 -44 range is right. The engine is great on gas with a great range on a tankful. Things you can look at to improve your situation are: proper trim of the boat, 21 inch prop with loss of power on the low end, use mid range gas and add an additive to offset the ethanol. Consider changing fuel filters, spark plugs, distributor cap and a carb rebuild may be necessary if not done in many years. As for the heat problem I would look at a new impeller. The normal operating temp should be 150 for all speed ranges.
|
Re: Diablo 3.0 Power Options
Here are my latest findings. Did a compression test for 3 of the 4 cylanders (need an extension to get to the fourth). Test read 140, 150, 155. I found where the smoke was coming from.... the carb. Looks like the yellow tube which I believe is the blow back used to deliver fuel to the carb rather than the boat??? was clogged as well as where it attached to the fuel pump. I think this means the fuel pump is bad? Only weird thing is I didn't have any hesitation while opening her up.
|
Re: Diablo 3.0 Power Options
Can you shoot us a pic of that Gin?
Larry |
Re: Diablo 3.0 Power Options
Yes sir:
http://i998.photobucket.com/albums/a...A/IMAG1510.jpg Notice where I have the long screw. That port was totally clogged through to where the fuel comes in from the pump. I cleaned as much rust and orangey gunk out as I could with a screwdriver and that screw. I am not sure if WD40 is a good fit to clean more and remove rust and lube the spring. I would guess not since it is flammable and inside of a fuel pump, is, well..... Fuel delivery to the carb was fine. Can I clean out this pump and re-use? |
Re: Diablo 3.0 Power Options
At this point I think I have hi-jacked this thread. ,) Sorry. Perhaps a moderator can move this to the projects section under the title "Gin Time Diablo Resto"?????
|
Re: Diablo 3.0 Power Options
Larry,
Are you playing wth your trim? When WOT, start trimming up small amounts at a time. You'll should notice and feel a difference. Find a happy medium on the trim by watching your speedo. When it starts getting to high, you'll definitely see it on the speedo / feel it. I have no problem w/42 mph - 44 mph w/my 3.0, depending on conditions. -Brad |
Re: Diablo 3.0 Power Options
Check over the diaphram good for any signs of cracks or warpage. If none clean it up and give it a shot. Do a preasure test on it. Don't hold me to it but I think it should be around the 6-8lb reading.
Larry |
Re: Diablo 3.0 Power Options
sterlib ,
I take it your talking to Gin? Larry |
Re: Diablo 3.0 Power Options
Larry,
Yeah, sorry. Looked at wrong name.... |
Re: Diablo 3.0 Power Options
I've decided to clean up the fuel pump and keep it as a spare. A brand new one from Sierra is just $110. Small price to pay for piece of mind knowing I have a solid fuel system. New one gets picked up today so fingers crossed.
|
Re: Diablo 3.0 Power Options
Excellent idea. Just remember to change out the filter too. That yellow line running to the carb is part of the USCG approved pump. It deverts the fuel from a blown out diaphram in the pump to the carb. Keeps it from dumping fuel into the bilge.
IE: gas leak , fumes , boat go KABOOM!! Larry |
Re: Diablo 3.0 Power Options
I took her out yesterday in about 1-2 foot seas and a good 10-12 knot wind. WOT @4800-4900 RPM was 36 with just me onboard and trimming the drive up. No smoke or smell. Responded very well and ran what I consider normal. The new fuel pump definitely cured her woes. I think taking her out with water like glass and no wind she will run at 40 no problem. I also changed the Racor 5510 fuel water filter and added a bunch of Sea Foam to help clean up the fuel and tank. I am sure there is bad fuel in there and perhaps some crud at the bottom of the tank. I plan on running her a lot over the next few days to try and burn through the tank. I got 3 extra filers so I will be changing them as I go as well.
I have a 19 inch prop now and she is running high RPMs at around 4900 @ WOT. I am considering going up to a 21 pitch prop to reduce RPMs and increase WOT. No problems sacrificing some low end torque for an increase in WOT. |
Re: Diablo 3.0 Power Options
Good to hear Gin!!
Keep playing with her and she'll get better and better. Probably wouldn't hurt to change the oil again after you run thru maybe 3 tanks of fuel. I am glad to hear that you are getting happier with her! :) Larry |
Re: Diablo 3.0 Power Options
Thanks Larry. We're going out for the day on the boat tomorrow. So psyched. Installing new switches in the am before we go out. I plan on doing at least two oil changes this summer. I am considering Amsoil or Royal Purple just to make sure I have some good quality oil protecting the engine.
|
Re: Diablo 3.0 Power Options
That's funny!!
I've been running Royal Purple in the motor and drive of the last 2 boats I have owned , plus the Diablo I now have. I love the stuff even if it is a little pricey. Have fun!!!! :) :) Larry |
| All times are GMT. The time now is 04:52 PM. |