Info on 165hp 250ci in line 6 cyl.

[gofastsandman]

The 292 is a long stroke engine and a 250 is more square which is what I would
want in a marine application.

Snort snort Delorean used a sohc head on the PMD sprint 250 motah which had a belt driven hot cam and a quadrajet carb.

The engine gained a reputation as a good performer at 250 hp, but the belts didn't last
and many failed at under 60 k miles.

As for your engine, I would take out the plugs and fill the cylinders with kerosene and ATF.
Let it soak for a week and turn it over to get the liguid out. Then spin it with an impact driver. Change the fluids and light her off. Then do a compression test. It may be in good shape.

Many engines sit for decades and can be brought back to good health.
If this is the case, I would then pop the heads off and check the extent of corrosion
in the jackets. The valve stem seals may also be dry rotted but that is a cheap fix.

[pelican]

Originally Posted by gofastsandman

The 292 is a long stroke engine and a 250 is more square which is what I would
want in a marine application.

Snort snort Delorean used a sohc head on the PMD sprint 250 motah which had a belt driven hot cam and a quadrajet carb.

The engine gained a reputation as a good performer at 250 hp, but the belts didn't last
and many failed at under 60 k miles.

As for your engine, I would take out the plugs and fill the cylinders with kerosene and ATF.
Let it soak for a week and turn it over to get the liguid out. Then spin it with an impact driver. Change the fluids and light her off. Then do a compression test. It may be in good shape.

Many engines sit for decades and can be brought back to good health.
If this is the case, I would then pop the heads off and check the extent of corrosion
in the jackets. The valve stem seals may also be dry rotted but that is a cheap fix.

if cylinders are rusted,valves are rusted - filling it with that cocktail is going to do what ?

you are aware that cylinder and pistons have a clearance spec ? also,no surface defects should be present on either area,yes ? notice we haven't touched on the valve train quite yet ?

spin it with an impact wrench ?

pop heads off ?


perhaps a better move would be to see if it actually spins over,with the plugs out - we'll skip the impact gun for this and substitute a breaker bar instead....turn it over a few times and see what happens


"step up" is claiming the motor's free:
"The 6 that is in the boat turns but has sat for many years so a total rebuild is a must. Ty for the info "


overhaul on that motor is going to be cheap - the "hang ons are the $ exhaust manifold,carb,electrical - I would count in as all hangon parts needing replacement...



are you not the same gentleman that was attempting to rebuild a 24 topaz a few years ago ?

[pelican]

Originally Posted by Step Up

So I have this 1974 20 foot Sceptre it has the original 6 in it. I want this boat for a run about only. So I was thinking pull the 6 and go 5.7 or 5.0 but then I was thinking why. I am not building a race boat. But I would like to spruce it up the 6 a bit. Have any of you beefed up a 6 before? As well any one know the average WOT of a 20 I/o with the 6

no need to "beef" anything up
an inline 6 cylinder will NEVER wear out - no torsional vibration

lots of torque



but.....


smart play :

try and find a used 4.3v6 with a newer alpha gen II drive and transom plate - the space available in the motor box will be nice and parts are readily available for those 4.3's


way too many variables in an old power set up that's been sitting for years - read that as $

no need for 5.0 0r 5.7 motors in that rig...lots of big boats just sitting around - lower end "cock tail cruisers",like maxxum's,bayliners.rinkers - that were powered by 4.3 merc's - you can often pick these "donors" up for pennies
often times,these "cruisers" were fitted with the more desirable "bravo" drives - usually the bravo II drives - these drives are pretty much bulletproof....

might be a good avenue for you to explore....

[gofastsandman]

Originally Posted by pelican

if cylinders are rusted,valves are rusted - filling it with that cocktail is going to do what ?

you are aware that cylinder and pistons have a clearance spec ? also,no surface defects should be present on either area,yes ? notice we haven't touched on the valve train quite yet ?

spin it with an impact wrench ?

pop heads off ?


perhaps a better move would be to see if it actually spins over,with the plugs out - we'll skip the impact gun for this and substitute a breaker bar instead....turn it over a few times and see what happens


"step up" is claiming the motor's free:
"The 6 that is in the boat turns but has sat for many years so a total rebuild is a must. Ty for the info "


overhaul on that motor is going to be cheap - the "hang ons are the $ exhaust manifold,carb,electrical - I would count in as all hangon parts needing replacement...



are you not the same gentleman that was attempting to rebuild a 24 topaz a few years ago ?

I prefer a 1/2 ratchet for the first turns.
Said she turns.
Never owned a Topaz.

Not everyone has an open checkbook.

Is hangon a word in Jersey?

Put a brick on the gas pedal of Snowman`s 68 350 skylark with the wheel locked over.
Had one of the worst rod knocks I have ever heard.
Took 20 minnows to throw a rod.

Head bolt torque spec and pattern is 7th grade.
Pop Pop.

I am not an aerospace machinist and neither are you.

How do you file your rings?

[pelican]

Originally Posted by gofastsandman

I prefer a 1/2 ratchet for the first turns.
Said she turns.
Never owned a Topaz.

Not everyone has an open checkbook.

Is hangon a word in Jersey?

Put a brick on the gas pedal of Snowman`s 68 350 skylark with the wheel locked over.
Had one of the worst rod knocks I have ever heard.
Took 20 minnows to throw a rod.

Head bolt torque spec and pattern is 7th grade.
Pop Pop.

I am not an aerospace machinist and neither are you.

How do you file your rings?

"step up" - he owned a topaz



"hang on" - hang on parts,as I described them...


open check book ?? there's things that work and things that don't....a motor that's locked up,pouring a cocktail in it and attempting to "free it up" with an impact gun isn't the best approach - would you agree ??

could you point out where I made the "aerospace machinist " claim ?

one doesn't need to be an aerospace machinist to know a motor that's locked up from sitting,is going to need more than a "cocktail" of kerosene and ATF to make it useable...those areas of rust and corrosion,along with the left over debris - tell me,where does it go ? tell me,if the cylinder walls are pitted,from corrosion,what happens to rings as they grind against these areas ? tell me,if a valve stem rusts into an internal valve guide,what happens to that valve and guide ?

most often,these "backyard" "fixes" aren't the best approach....

that in line 6,it has one cylinder head....


above was said with a grin,watching Hillary take a beating ,sweating like a hooker in church...should I have said "hookah" ?

[cc]

I have a 1965 bow rider with a 230 ci 6 cylinder and mercruiser. Dad bought it new from Mr. Mosley, and I got it in 1975. I have put over 1500 hours on it, and it still runs very well. It is bullet proof. I put a freshwater kit on it in 1976, so that helped. With a 19 inch prop (large ears) it runs about 42 mph. I figure 6 or 7 miles to a gallon. That is with full fuel (28 gallons), and two of us (over 240 each). It has a type 1c merc out drive, which needs to be replaced. This is very similar to an alpha. I have a v6 with alpha Gen 2 I was going to put in it, but the engine cover would not fit without modification. You can buy manifold, breaker less ignition and most anything you need cheap. Hard to beat the iron duke!

[gofastsandman]

Originally Posted by pelican

"step up" - he owned a topaz



"hang on" - hang on parts,as I described them...


open check book ?? there's things that work and things that don't....a motor that's locked up,pouring a cocktail in it and attempting to "free it up" with an impact gun isn't the best approach - would you agree ??

could you point out where I made the "aerospace machinist " claim ?

one doesn't need to be an aerospace machinist to know a motor that's locked up from sitting,is going to need more than a "cocktail" of kerosene and ATF to make it useable...those areas of rust and corrosion,along with the left over debris - tell me,where does it go ? tell me,if the cylinder walls are pitted,from corrosion,what happens to rings as they grind against these areas ? tell me,if a valve stem rusts into an internal valve guide,what happens to that valve and guide ?

most often,these "backyard" "fixes" aren't the best approach....

that in line 6,it has one cylinder head....


above was said with a grin,watching Hillary take a beating ,sweating like a hooker in church...should I have said "hookah" ?

Try reading post 11 again. Reading comprehension is clearly not your strong suit.

OP stated in post 5 the engine turns.

A straight 4, 6, or 8 only has one head?
You don't say. My head just exploded.

They say the best thing coming outta south Florida is 95 north.
Maybe you and Chris can carpool to Ft. Lee.



Mmm, hookahs.
Mmm, scallops.

`Tis best to dive when the grass is standing at slack tide.

[pelican]

Originally Posted by gofastsandman

Try reading post 11 again. Reading comprehension is clearly not your strong suit.

my comprehension is just fine

my strong suit is repairing

not so sure about your's

let it go....

[gofastsandman]

Originally Posted by pelican

my comprehension is just fine

my strong suit is repairing

not so sure about your's

let it go....

Poof.

This site is and has been about everything we love.

[Islandtrader]

Boys-Boys-Boys....now behave or I will have to take your keyboard away from "y'all . LOL