Am I Crazy???

[aweimer]

True.. Updated link..

http://www.marineenginesales.com/marine_engines.php

$1200 standard rotation, $1300 counter rotation, not too bad. I might need to keep this handy, my starboard engine is origional. Port was a long block replacment 2 seasons ago.

[jddens]

Any of you Florida guys heard of Daddyo.s marine? They have a lot of motors on ebay, brand new and remand ...........

[k9th]

I have been thinking about your problem with the zero oil pressure at idle when warm.

Your oil level in the pan by the pickup should be at its highest when at idle since you theoretically have less oil being pumped at low RPM and less oil in the upper part of the engine waiting to drain back down to the pan. At higher RPM your oil level in the pan by the pickup is probably at its relative lowest since you are pumping more oil at higher RPM and a larger quantity is in the upper part of the engine.

The fact that you have pressure at idle when it is first started is not surprising since the viscosity is much higher when the oil is cold than when it is warm.

Most engine oil pumps that I am aware of are gear pumps and it sounds as if your gear teeth in the pump may be worn past the point of usefulness. When the gear teeth are severely worn, the clearances are very excessive and will not build pressure at low RPM with low viscosity liquids. The higher viscosity fluids fill the clearance gaps and allow the pump to build pressure. Under no circumstances would I run the engine for more than about a minute with zero pressure.

Just some thoughts.

[jddens]

This oil pressure problem developed immediately after a short high speed run....lots of bearing material in the oil and filter pleats.....ate some bearings for some reason........time to rebuild.........John

[jddens]

Well after many hours considering/researching all options I have decided that maybe I am crazy........that is crazy to replace two engines when I can most likely get by fine rebuilding one and doing some maintenance on the other. Last week I warmed both motors up and did another compression check.......I was surprised to fine excellent compression in all 16 cylinders......all read 160-170 !! My previous compression test showed problems on both motors, I don't remember for sure but think that test was done on cold motors. My current plan is to put new bearings in the starboard engine with low oil pressure, or troubleshoot the problem after pulling the engine and oil pan.....I am going to do a full tune up on both, replace the high pressure fuel pump on the port engine (making a lot of noise) , replace manifolds and risers and impellers.......I am also going to have everything aligned to eliminate a slight vibration in the drive trains.......I hope to start this project after the first of the year..........Hope you all have a Merry Christmas..........John

[prowlersfish]

Wise move , not surprised by the compression readings , If a engine is cold and sitting ( like a boat will do) you can get false low readings as things "stick" run them and things free up and all is well .

[jddens]

UPDATE.......Well I am finally making progress on the new motor. I had the mechanic aboard yesterday to survey the the situation and make plans. The boat needs to go on the hard for motor removal. While it's out I will have the bottom done and buff her out nice. I am having the mechanic pull and strip the engine, then the long block it will go to a local highly regarded machinist for rebuild, then back to the mechanic for assembly and re-installation. This process will give me a 2 year warranty so if there are any problems, someone else will own them. While the boat is out both impellers will be replaced, trans serviced, through hulls will be checked and re-bedded, if necessary and bilge cleaned up......I will then do a complete tune up on the port motor and should be good to go..............hoping to take her in next week to get started, just waiting on the estimate but have a good idea what it will be...........I plan on taking some pics of the process. I know we like pics so if I can figure out how to post some I will.......that's it for now..............John

[rossjo]

Sounds like a great plan - those engines should give you many year sof good service, as you sound like a guy who takes care of his gear!

[Allen Sr]

Here is an option. 4 bolt main, base 350, 290hp.

http://www.summitracing.com/parts/NAL-12568758/

Good price.

From their site.

Notes This engine is designed as a stock replacement for 1987-1995 C/K-Series TBI trucks with 7,200 GVW (or lower) and VIN code K. This engine is not designed, nor intended to be used in any marine applications. Engines installed in vehicles registered and normally operated outside of the United States carry no warranty.

I bought that very engine from summit and put it in my chris craft. Word of warning: DON'T DO IT!! You will be so dissapointed, I hand to tear mine down and change the cam to marine spec's to get it to perform right.

[jddens]

OK, got the estimate and made appt. to take the boat in tomorrow. Starboard engine will be pulled and rebuilt...She will be going on the hard tomorrow and probably be there 4-6 weeks.......while she's out I'm having the bottom done, through hulls re-bedded and new zincs.......and I'll buff her out. I've been waiting a long time for this and now that I've pulled the trigger I'm anxious to get started............I'll post some pics soon.....John

I know this has been discussed at length but any recommendation for wax?? Last time I used 3m restorer and wax. It seemed to work good but always looking for something better and/or easier............

[prowlersfish]

Good luck hope it goes well . I also like the 3m restorer and wax

[Captain Blast Off]

Just read this entire thread... I have to say you guys considered it all and then some but it sounds like you made the right choice fixing one engine is better and cheaper then trashing them both and starting over TBI is not that scary.

Who's doing your haul out and work?

Steve

[jddens]

Works being done at Bethel Harbor Marina on Bethel Island.......I have looked for 2 years for a decent mechanic that will at least communicate with me and they are the best so far. Several boats in my marina have had work done there including engine replacements and all seem happy with the work............time will tell..........taking her in about an hour.............John