1991 wellcraft 196xl eclipse 4,000 rpms at wot

[theblob]

Re: 1991 wellcraft 196xl eclipse 4,000 rpms at wot

4,000 Rpm's might be good may make engine last a long time as long as well maintained.dont really run full throttle all the time anyways.hours wise about how many can you achieve out of a 305.i know counter says 345hours,but motor been rebuilt recently so motor might only have 150 hours.can you get 3,000 hours out of a motor with all that stress and high rpm's when cars usally around 2,000 rpm's normal speeds?

 

[achris]

Re: 1991 wellcraft 196xl eclipse 4,000 rpms at wot

4,000 Rpm's might be good may make engine last a long time as long as well maintained.dont really run full throttle all the time anyways.hours wise about how many can you achieve out of a 305.i know counter says 345hours,but motor been rebuilt recently so motor might only have 150 hours.can you get 3,000 hours out of a motor with all that stress and high rpm's when cars usally around 2,000 rpm's normal speeds?

Quite the opposite. If you run a propeller with too much pitch you put a much increased load on the engine, over the whole engine speed range, not just wide open. Much better to run a lower pitch prop and control the revs with the throttle.

Chris.....

 

[theblob]

Re: 1991 wellcraft 196xl eclipse 4,000 rpms at wot

I see what your saying less stress but more rpm's.im figuring around 4300 rpms,because its close right now.i hit 4100.not forsure if carb is even opening all the way up,but ill check that.i just like to get some ideas before tinkering.its got new prop just like the original one.i really want to put a 1.50 gear drive on it,but probly would be too much stress and only lower the rpms.i see them drives alot used for around 200.if it needs u-joints may be easier just to slide new drive in take a chance on one,put new impeller ofcoause.i hope i didnt mess the new gimble up jacking motor up again without pulling drive.it was only like 2inches doing freeze plug on this side.it doesnt make any noises in water.sure was fun.run about 40gals gas in 3 days.i cant believe all the gages work.most around 91 gages usally messed up.i need to gps speed but dont know where to go on phone to do it.

 

[achris]

Re: 1991 wellcraft 196xl eclipse 4,000 rpms at wot

For GPS on a phone you need to load an App... I use GPSTest.

As for swapping a drive just for a uni... WHY???? Just replace the uni. It's not difficult, or expensive. And if you get 1.5:1, more load! (and a drive of unknown condition)

You didn't say what size prop you're running now... Can we ask? (or is that a bit like asking for a serial number? :facepalm: )

4300, in my opinion is still too low. If you get the next prop smaller, it should lift the WOT revs to about 4700. That means much LESS stress on the engine. My engine will run to about 5100 (spec is 4400-4800) if I let it. Most of the time I am running about 3000, and the engine is just purring. If I put the next size prop bigger (gives me 4600 WOT), then run at the same boat speed, the revs are lower, but I can hear the engine working that much harder to maintain the speed. Within reason, it's not excess revs that will kill the engine, it's excess load, and that's created by having a prop with too much pitch....

Chris.....

 

[theblob]

Re: 1991 wellcraft 196xl eclipse 4,000 rpms at wot

Can i replace the u-joints without having to pull the axil out of the unit using some kind vise or do i have to pull it too.i really dont want to pull it out of unit sounds difficult in book.i dont want to hammer them out messing that bearing up.heard can use clamp,but if you get a hard one.any tips be helpfull,because will do this winter while detailing boat.

 

[theblob]

Re: 1991 wellcraft 196xl eclipse 4,000 rpms at wot

See the boats at my dads,and i probly do need to get all the info on whole boat.im the worker,but get to enjoy the boat rides too.whatever the boat came out with is what the prop is.the guy that had it before ordered all original stuff,but i will check prop.the old prop dont look bad just chipped.illl probly file it down,and save for a spare.i know after chips and filing prop probly be a 1in smaller.ive got spare starter,carb,prop,gaskets.altanator.this guy was putting all new making sure it would be good.nice to have spares.

 

[achris]

Re: 1991 wellcraft 196xl eclipse 4,000 rpms at wot

Replacing a uni with the 'axle' as you call it, in the drive shaft housing it quite simple. Removing the 'axle' from the drive shaft housing is also not difficult, but does require the special tool, and a torque wrench.

In the housing does require the judicious use of a hammer, but you should be holding the uni in your hand when hitting the coupling, so the impact on the bearing pack is nil.

You could also use a clamp as a hand-held press and get them apart like that too...

Many options... Just choice the one you feel most comfortable with.

Chris........

If you have the stern-drive service manual, it's in there, all laid out nice and simple...

 

[achris]

Re: 1991 wellcraft 196xl eclipse 4,000 rpms at wot

....whatever the boat came out with is what the prop is.....

Boats don't come out with a 'standard' prop. The prop is selected by the guy installing the engine and drive to best suit the engine, boat size and weight and the boats' application...

The way it's done (or should be done) is for the installer to go to the water with the boat and a handful of different props. Test run the boat with the different props until the engine reaches the right revs at WOT... That is the right prop for that boat.

Example... I should be running a 19" on my boat, and it's a 20' cabin. Another 20' cabin cruiser running that engine might have a different hull shape, or weight, therefore will need a different prop. I do in fact, have a friend with exactly the same engine, and it's in a 20' cabin cruiser, and he needs a 17" prop...

You need to get to the water, with engine running correctly, and the carburetor opening up properly, and the timing right and an ACCURATE tacho (not the one in the dash, just not accurate enough), a full tank of fuel and the usual load you have on board, and run the boat at WOT and see what you're getting.

Accurate hand-held tachos are not that expensive... This one looks really nice, and it has all the other electric functions you'd ever need.

New 1999 Auto Range Digital Engine Analyzer MS6231 Dwell Car Diagnostic Tach TEM | eBay

Chris.....

 

[theblob]

Re: 1991 wellcraft 196xl eclipse 4,000 rpms at wot

Yeah ill definetly do that after tuneup.i need to find a timming light too.once running it will start up with just touch of key so timing probly right,but better off to know its right.thanks for all the help.im just learning.my dads been working on car engines since a kid.just cant do the work.i like learning,and this site sure a good place to learn.