pair of 502's 590 hp 15k
 

I have a pair of recently gone thru 502's not yet installed built by bob at thunder boats dyno time only had 590 hp with very conservative tune come carb to pan with oil coolers and ignition text for pics and i can put you in touch with bob for any questions if you are a serious buyer need to get 15k for the pair or 8000 for 1 Gene 617 957 1832 my fountain they were going in is sold

cast iron world heads on these

I've used this engine builder with good results. I am also familiar with this set of engines, as they were built just before my set. Impressive but conservative, reliable packages!

If you need reliable strong torque, I would not hesitate to buy these! Price is also very fair!

thanks for the kind words

here is what i was told was done to them
HUNDERBOLT ENGINES
Mercruiser 502 -500hp– 575+ hp engine package
1-502 gen 5 block , std bore , 4 bolt mains ,one pc rear main , honed , ck aline bore , cleaned, prepped , new cam bearings
2- steel crankshaft, 4.00 stroke , polished , balanced with assemble .one pc rear main ,cleveite 77 bearings
3- 7/16 dimple connecting rods , performance rod bolts, cleveite 77 performance bearings
4-forged std 502 performance pistons , performance wrist pins , mahl plasma rings , 9;1 compression , 93 + octane
5- crane marine performance hyd roller cam, mhp 300, hyd roller lifters , cloyes timing chain, crane roller rockers , 3/8 pushrods .080 , timing cover , degreed + 4
6-World/merlin after market performance heads , grump model, ss valves , performance valve job, valve springs , harden retainers , port clean up , surface , proper spring psi for hyd roller cam. alum valve covers
7-team G alum intake , spacer, throttle plate , 830 Holley carb , flame arrestor, fuel lines , fuel filter bracket
8- 8-Qt oil pan, hv oil pump, remote oil system , hoses, hd oil cooler , race oil and race filter
9- mercruiser thunder bolt ignition system , dist, brain box, new cap, rotor, spark plugs
32 degree total advance
10- water pump , with pulley,
11- harmonic balancer , lower pulley, alt bracket, mis adjusting brackets , engine wiring harness, alternator , ,bravo flywheel,
12- mercruiser sea pump with fuel pump , new impeller kit ,
13- Build up on engine, assemble, blue print , set clearances, degree cam, set lifter per loads,
14- dyno engine , break in, oil change , load test , performance test , air fuel adjustment , set timing . change oil with VR-1 20-50 racing oil
15-dress engine with marine hardware , paint engine ,
16- hp starter , with spec bolts ,

ttt

ttt

motors are sitting on stands on pallets i will also build boxes for them out of plywood and drop at local shipper no charge

looking to repower?

to the top for a nice pair of motors built by a pro

sunday bump

ttt

would make a great Christmas gift :thankyouthankyou:

would make a great Christmas gift :thankyouthankyou:

Does that mean you are planning on giving them to me for Christmas? lol.. Wish I had some extra $$ right now. These are powered for what I'm looking for eventually

how about you give me 15k for christmas and i give you 2 well built 502s sound fair?

Tried messaging you, said your box was full. Please pm me.

ttt merry christmas

ttt

Pming you

Guys, I know the builder of these, he built me a set just like them right before this pair. Trust worthy builder with 40yrs experience, including full blown race motors. I only have good things to say about the builder!

This is a good deal for a turn key, completely fresh, fully dressed pair!

Hi are they set up for bravo or trs..

these are set up for bravo no bell housings included though just flywheel

could you email some [email protected] are the located,,boston ?
Thanks
Leif

merry christmas!!!!

Merry Christmas Gene.
I've been trying to reach you in the last couple weeks about the motors. If they are still available, could you please contact me 4439751808?
Cheers
Will

Are these still available?

sorry have not been on for a while they are still available fresh and ready to go Gene 617 957 1832

what CAM? Thanks

builder used crane cam not sure of the specs but i was told you need dry to the tip exhaust

ttt

ttt

looks like they are sold pending payment thank you oso

still have not come to terms with potential buyer so I am going to leave these up for sale !! great motors at a great price

Gene have a guy in CT with interest for his gun.

tell him give me a call 617 957 1832

Gene if you want you can call me also. Take care of him on them. Good guy to deal with.

The MHP300 cam listed is the stock cam for the HP500 carb engines

Are these still for sale?

Is one of the motors reverse rotation?

Im the buyer on these and only getting around to commenting on it now because it took awhile for Dave at MDG to get around to working on them, then i was overseas by the time the picture became really clear and only back last week. The motors have not been fired up yet, the good news is that the leak down test numbers were good (all around 10%). The bad news was that all the accessories appear to be original (gen 5 blocks so 92-95?) and the verdict is that i'll need to replace all of it along with missing bracketry pricing out to around 9k (for Mercury stuff) if i expect them to run at all reliably. Dave's recommended replacing everything: Oil coolers & rigging, water temp senders, flywheel has broken teeth, ignition, wiring harness looks dodgy and missing brackets. One fuel pump actually came with a tag hanging off which says "Tested weak low PSI at RPM needs to be replaced". The seller Genob claims that he never saw that large tag which is unmissable, but in a phone call he acknowledges that he planned to scrap all the accessories and swap them over from his previous engines. Well Gene, ya think maybe you should have honestly disclosed all that in your ad when we discussed how great these would replace my worn out motors and set me up for reliable boating with rebuilt engines?

He's offered me a couple hundred for one new fuel pump and beyond that i can go pound sand. This surprise along with some other unforeseen developments means my summer on the water may be over before it began. A disappointing and hard lesson learned.
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