View Full Version : General Q & A




  1. 525 intake manifold vs 502 Mag intake manifold
  2. Manifold question
  3. Cam question (Whipple 500efi)
  4. Solid roller lifters?
  5. DO cool fuel lines go bad? Got a kink in one of mine.
  6. Drive and Tab cable length for 81 Scarab s type.
  7. slop in throttles 81 Binnacle mount single lever twin throttle shifters
  8. Better option for Fuel Filter/Water Seperator?
  9. Stem Pocket Lines on 502 MPI Intake
  10. 6.2 mercruiser valve springs?
  11. Machine and weld exhaust
  12. Any 28' Powerplay or 29' Phantom experts??
  13. Silicone hose for exhaust?
  14. Compression ratio
  15. Hydraulic vs hydraulic roller.
  16. is there a gas grill website like oso ?
  17. SBC cooling question?
  18. 496 MAG ECM on a 496 MAG HO??
  19. Bravo 1 496 Mag Exhaust Riser Question
  20. Solid roller adjustments or check intervals?
  21. Hp3 GM racing 2005 525 motor
  22. Pro comp bbc intake min CSA vs 454r min CSA and minimum to maximum differences
  23. Valve cover differences
  24. best vinyl conditioner
  25. Bravo Drive oil cooler-Drew Marine Cool Swirl
  26. Thumping idle
  27. Swim platform for a Switzer 24SS
  28. 525sc Rebuild
  29. roll off work on...
  30. 525 Fei Crankshaft
  31. Ignition
  32. how much power can stainless marine take
  33. Where can I get a small piece of Corinthian riviera red carpet
  34. Rebuilt HP 500 carb motors
  35. Anyone know these shifters?
  36. Mercruiser 496 Fuel Pressure Regulator-2004 Cool Fuel
  37. Anybody had your fuel pressure guage pegged?
  38. Scorpion Rockers... good, bad?? ugly? long life??
  39. tranny cooler plate....how hard?
  40. Aluminum head valve seat material??
  41. Mercruiser cyclone 400 manual
  42. Dana marine exhuast
  43. Replacing cylinder heads on a 500efi?
  44. Tips for Pressure Testing Headers
  45. -12 bungs
  46. 28 daytona eliminator and procharger fitment
  47. Dart block oil temp
  48. Stainless marine exhaust Q
  49. Alpha Cutout Switch NOT Working
  50. NA pistons
  51. Low speed cavaition, what would it feel like ?
  52. Bravo III prop nut
  53. What's the difference between 35-16595Q and 35-16595 and WIX 51515R
  54. Why don't boats have multi-speed transmissions?
  55. Replacing valve body on steering arms at transom anyone done this job tips?
  56. Verado 350 rigging manual.
  57. Mayfair extension box
  58. Daytona Ignition data logging. Engine tuning.
  59. Hard start 540 whipplecharged
  60. Quick question
  61. Mercury 520 / 540 / 565 opinions
  62. milkshake on dipstick... what now?
  63. Too much Bow Lift.
  64. Do all Merc Racing oil filters have ADBV?
  65. Internal tie bar???
  66. Vinyl Wrap?
  67. Winterizing?
  68. Getting reversion and need some advise
  69. Corvette boat conversion...any info
  70. 3.0 L 250hp EFI Mercury outboard
  71. Are Sea Strainers Necessary In My Situation
  72. Freevalve Update - Camless Engine
  73. Sniper intake results?
  74. Oil level question
  75. Cam Specs
  76. teague pop up add
  77. idler pulley
  78. merc gear lube
  79. Hardin SS Exhaust Flappers......Alternative?
  80. Hydraulic Steering help.
  81. 500efi Saga Continues
  82. Timing question (setting initial/total)
  83. Roots blower top pulley not lined up with crank
  84. Merlin BB heads
  85. Engine builder wants $3000 more for Merlin block?
  86. Lets play the HP guessing game
  87. MSD Control Box wiring
  88. What are the chances of getting parts back from a engine builder
  89. Ilmor Oil Filter
  90. 502 harmonic balancer
  91. Any thoughts on how easy making power is?
  92. 572's with inter cooled 14-71's
  93. Compression numbers all over map on new , not yet broken in kongblock
  94. Marine Bluetooth 4.0 receiver
  95. 598 Engine Advise
  96. Valve springs
  97. Cylinder Head Volume: mercury 525 efi
  98. twin outboard V setup
  99. Is an air gap manifold needed?
  100. New 540 Combo
  101. Engine swap
  102. Anything to prevent where the outdrive "rubs" the gimbal ring
  103. Potential soft floor issue?
  104. Another Procharger needed ASAP!!!!
  105. 700 sci shift interrupt switch
  106. K plane sending units
  107. Valve seat materials
  108. 496 HO randomley turn off/on video
  109. Goodmorning from Italy!
  110. Clay Smith cams???
  111. What valves to use in EQ320 BBC heads?
  112. MEFI 4 to Nema
  113. 496HO problems looking for input.
  114. 454 oval port build results
  115. 2000 500EFI - Fuel Issues - need expert advice if possible
  116. Mrercury 700 dropping boost
  117. Converting from crossover to circulating pump.
  118. 4.3 Gl volvo ignition problem
  119. Afrs vs temp
  120. 38 ft mates cat. Aka cat scratch fever
  121. Dayton, Ohio
  122. Winterize with Super Chillers
  123. Jumping power hatch switch
  124. Motor Issue WOT 4000RPM
  125. 588 Idle Question
  126. New engine issue
  127. Alignment question with off shore mounts
  128. Waterjet system at transom of the ship hull
  129. SBC oil bypass question , reuse ok and orientation ?
  130. Rear Anchor
  131. Raylar 540 cu Short Block 496 upgrade ??
  132. holley throttle cable bracket
  133. What should a healthy vacuum reading be on 525 EFI?
  134. Exhaust manifold choice
  135. Couple videos for you guys
  136. I do believe I got bit by my purchase...
  137. Oil bypass question
  138. 496 Exhaust Risers on 6.2MPI's?
  139. Electric Hatch Actuator, Solenoid?
  140. What to do With My MK Cams
  141. DIY Winterization
  142. quick fuel carbs
  143. Drive setup on 30' Advantage
  144. Livorsi oil pressure gauge problems
  145. Some carb / intake info
  146. 509 MPI Starter
  147. Sonic Vendetta
  148. Help picking out a cam...
  149. Boat preparation for hurricane?
  150. Solid cam VS hydraulic VS short travel hydraulic?
  151. 4500 series intake that also has 4150 bolt pattern?
  152. facebook powerboat swap shop
  153. 2.3 on a 502
  154. Suggestions for a 35-38 cc under 300k?
  155. bell housing bushings
  156. Sealant / adhesive for sealing foam gimble gasket to transom
  157. Cleaning White Upholstery?
  158. Best Gel-Coat Repair
  159. Phone borescope...kinda cool!!
  160. Hardin Seaward 525 replacement exhaust
  161. Replacing Water distribution valve.
  162. Winterizing - battery maintenance
  163. 32 maelstrom
  164. Custom cam thread
  165. Fram XG5 502 MAG MPI & 20W50
  166. Would you rebuild those 500 efi with those readings?
  167. Merc Gen 3 cool fuel filter
  168. Need some help - Port motor not running
  169. Hydraulic steering
  170. How much reversion is too much??
  171. Gen1 Stainless MArine limitations??
  172. Four Winns Liberator 211
  173. Sc scoripion. Lots of questions
  174. Using freshwater flush port to winterize
  175. MEFI 4B CD or Download Needed
  176. 496 HO Question - What are these and how should they be adjusted?
  177. Give this 502/509 Combo Some Thought
  178. What Carbs would you buy
  179. Fighting a miss under load
  180. The curse continues... Brand new coupler slipping?
  181. Best Carb Spacer 4 hole or Open?
  182. Merc Smartcraft mpg... U.S. or Imperial?
  183. Water in hydraulic trim system
  184. Go badgers.
  185. US gasoline power beginner questions
  186. Heads/Cam or Supercharger?
  187. Water Traps in the Fuel Tank?
  188. best hole shot Trim tab position
  189. AFR numbers what's good and what's bad ..
  190. Bmax drives input
  191. gaffrig silencers
  192. 525 Edelbrock head
  193. 502 oil issue
  194. Setting the base timing on rebuilt 500 EFIs???
  195. 6.2 MPi
  196. Engine Air Temp
  197. Looking for engine builder in ct area
  198. Mercury 600SCI - Engine Fault - IAC Output
  199. Stainless marine exhaust converted to dry? Gains?
  200. Dyno... Marine trim VS Dyno (race) trim
  201. Upgrading fuel lines due to age and upgraded engine
  202. Repower/ long lock opinions
  203. Mercury 520 Performance upgrades
  204. 454 suddenly stopped, abruptly, would not even turn over. Took plugs out and
  205. Boat plugs out with pipe dope
  206. Boat plugs out with pipe dope
  207. Powerquest razor 22
  208. Aluminum heads
  209. Cam and valvetrain longevity....??? low duration high lift...
  210. Mercruiser 470 stalls after it has been warmed up. Wont idle under 2000 rpm
  211. Going from 5.0 to 5.7 or 6,2 SBC
  212. Opinions on rewiring engines
  213. Fluctuating engine temperature in my 2000 7.4 mpi Mercruiser Bravo 3
  214. 1075 sc cam in a 565 NA build
  215. How to clean oil coolers
  216. Need a boat brought to Florida from the NH area.....
  217. Mercruiser 7.4 LX MPI Intermittent Overheat
  218. Driving thru chine walk
  219. recommends on engine oil
  220. Lightning or GiL
  221. Alternator only charging one battery while running - Scarab 33 AVS???????
  222. Wow I heard of msd issues. But dam.
  223. How fast can I go
  224. 500EFI Help!
  225. Horsepower VS Torque
  226. What are you guys using for water PSI and vacuum line?
  227. Acceleration and efficiency
  228. Bravo 1 outdrive sagging help
  229. Spun Drive coupler (or whatever the proper name is)?
  230. Larson Senza Spectre
  231. 496 HO sounds much louder when cranking
  232. Anybody know where I can get a 500 EFI Rubber seal for Throttle Postion Sensor?
  233. Need Help finding Power Steering Pulley
  234. Typical places oil leaks occur in the port side rear of the engine
  235. smartcraft alarm question
  236. MEFIBURN tuning help
  237. Slight poping sound out exhaust. Comes n goes. See first post. Spellcheck
  238. Cause has developed slight piping ish sound.
  239. Faria gauges on early merc smartcraft
  240. SBC hydro locked, water in #1 cylinder
  241. 600SCi 5 beep alarm
  242. faria tach setting
  243. Loading up at idle
  244. water hose to helmut connection
  245. 500 efi dipstick loose
  246. 500efi help
  247. Water in oil.
  248. Turbulators for Gil exhaust
  249. AFR 325 flow sheets.... anyone ever flow these heads?
  250. Anyone run 108 LSA cams in boat before? 700 HP DYNO proven combos welcome...
  251. Worlds fastest boats
  252. late '01 496 HO poor idle/occasional stall in nuetral at idle only
  253. 350 Mag engine wake up
  254. 525 hp
  255. 32 fever steering cables
  256. Baja 232 Voltage Issue
  257. oil cooler with built in thermostat
  258. 2002 Baja 29 Outlaw Fuel Vent Question
  259. Header tube discolouring, what should I do?
  260. Wierd sea water hose problem
  261. How much timing advance should I run?
  262. Stainless Marine manifolds SBC power steering line in the way
  263. Loosing fuel pressure
  264. I'm cursed!
  265. Cams size
  266. shipping a outdrive
  267. 500 HP Intermiten Idle Issue
  268. show me your Fountain speaker locations
  269. 575 sci
  270. Older 575hp 540ci merc bulldog engine knocking
  271. 1995 502mpi won't start when hot
  272. New style and old style 525
  273. Bravo 3
  274. Detonated piston & blew head gasket. Now what?
  275. frictional losses of 4.25 stroke motor vs 4.0 stroke
  276. efi for supercharger.
  277. Reoccurung water pump failures...
  278. Mag efi
  279. Mercury 525 Rocker arm replacement
  280. Oil pressure flutter at higher rpms.
  281. Do anti-reversion dams work?
  282. Replacement steering Verado 400R
  283. Hydraulic Hatch Actuator
  284. Oil Pressure Bypass Valve Question
  285. slip %
  286. Pre-Filter Oil Filter Screen - YEA or NEY ?
  287. Power steering pump fitting Aeroquip?
  288. Catalyst elimination for "test purposes"
  289. whats the torq spec for bravo transom plate?
  290. Msd total timing procedure when locked out
  291. A little more Tinkering
  292. 502 MPI intermitant no start when hot.... not fuel prob
  293. Fuel Coming out exhaust
  294. Hammer knocking noise when in gear over 3000 rpm
  295. Will MSD digital 6 work with thunderbolt distributor?
  296. Holley Commander 950 mpfi won't fire!
  297. Thunderbolt V ignition, will big block module work on a small block?
  298. need part # for hose transom to sea water pump
  299. GM Fastburn heads, any experience with these?
  300. Weber carburetor
  301. new 540 water in oil
  302. Vessl View & DTS
  303. Push rod retainers.
  304. 5.7 timing with comp 270 cam
  305. CMI headers. Are they fixable?
  306. EFI Systems
  307. Impeller
  308. Chaparral Villian SLV Speed Capability
  309. Motor Issues
  310. procharged 454 Mag rebuild upgrades ????
  311. Heat exchanger help
  312. Rosella Oil
  313. converting my 350 cid merc. 320 efi's to carbs. what jet sizes?
  314. Plug for ?
  315. 500 efi 50lb fuel injector
  316. 502 mag loads up under load.
  317. Outdrive line help
  318. drive swap alpha 1 gen 2 to bravo one
  319. Blind mounting swim ladder? - 89 Baja 226 Islander
  320. Advantage 27' rear seat removal
  321. Where to get gaskets 5.7 mag gen +?
  322. Imco riser gaskets
  323. 502 build
  324. External steering on a B1 vs XR
  325. 496 intake manifold gasket
  326. RPM Lug
  327. Dominator on 4150 sniper jr with spacer?
  328. 2005 Mercury Racing motors one is low on power
  329. 496 Rockers
  330. More HP in 7.4 MPI's?
  331. Bad Vibration, need help troubleshooting
  332. Hours vs mileage.
  333. Gear oil bottles
  334. Tuning 350 Vortec w/ LT4 Hot Cam & Holley 750 Double Pumper
  335. Anyone have oem MEFI1-4 tunes for 502MPI?
  336. Rpm issue ideas.... I'm lost....
  337. Any recomendations for a Surveyor near Gainsville Ga?
  338. Pontoon steering help
  339. 7.4 MPI low power
  340. Need help with block serial numbers
  341. Sea Strainer question Bravo Hose size?
  342. Stuck cabin door.....
  343. Loss of oil pressure after rough ride
  344. 32 fever sealing
  345. Supercharger Questions
  346. Mercruiser Alternator Upgrade?
  347. WTH is going on with my oil temp
  348. What is fuel pressure spec on 2001 7.4 454 mpi Mag?
  349. 540 NA MEFI 3 Intake Vacuum Question
  350. Help with prop
  351. Opinions on 1989 575hp bulldog 540ci and ssm 3 drives?
  352. 2003 496 HO dreaded two beep alarm
  353. 502 MPI Low Fuel Pressure
  354. 300xs ECU
  355. Strange noise... please help!
  356. How can I tell if my motor is inter or ext balanced
  357. Need a trim actuator clap
  358. 1987 454 merc main harness
  359. Newb, sure its not the first time.
  360. what transom work is needed to convert TRS to SSMIII drives?
  361. 600 sci
  362. lunati cam 20010666
  363. lunati cam 20010666
  364. Flush OMC 460 King Cobra - raw water pump in lower unit.
  365. draining the block - easier way? 1/4" valves?
  366. Water Restrictors
  367. need help replacing a harmonic balancer
  368. gen VI 525SC pistons
  369. Identifying 502's
  370. Suction hose
  371. speed gain
  372. Bell housing mounted starter
  373. Russell Check Valve VS. Anti-Siphon Valve
  374. 500efi with blower shop 250s
  375. Dyno sheet
  376. Anybody use Anthony's Marine Engines in St Pete?
  377. 500efi installing blowers
  378. Sonic with a 496 engine noise
  379. Help! 502 efi keeps stalling
  380. 502 efi temperature sending unit?
  381. Please, need help w/ mefi1 502 mpi code 21 and 42
  382. Rebuilding 502's
  383. 540ci 700hp build recipe
  384. 496 Ho question - fuel leak?
  385. 8.2 EFI fuel pump question
  386. Distributor info
  387. 496 Mag HO - slight miss, poor mileage, loss in rpm
  388. Quadrajet flame arrestor
  389. bomar hatch latched pulled off glass
  390. Which is easier?
  391. Plumbing water hull pickup or drive pickup?
  392. Replacing exhaust tips
  393. Main Bearings ?? Mercury Racing
  394. B&M 250/420 Idler Question
  395. Target Air Fuel ration N/A engines.?
  396. 871 Blower experts CHECK IN
  397. Mercury 500 Sea water pump
  398. Water pump direction 500HP vs 502 MPI
  399. 600SCI engine water Flow Issue
  400. So many threads on milky oil, but heres a bit of a spin
  401. Replacement MEFI 1 -- Any one know what my options are?
  402. Thunder powerboats
  403. HP500 Ignition Issues with Marine MSD Setup
  404. Cant trim under power??
  405. flywheel material and type
  406. Wiring the drive trim switch on the gaffrig throttle...is a fuse needed?
  407. 502 MPI build help
  408. Water Jacketed vs Water Injected
  409. Rinda Scanner Adapter Won't Fit 525 Diagnostic Conn.
  410. Dyno tuning technic
  411. Small block ignition
  412. 575 sci piston
  413. Smartcraft gauge options
  414. repairing acrylic wind screen?
  415. 28 Nordic, 29 Warlock, 288 Sunsation
  416. Low budget 7.4 rebuild
  417. Oil pressure...
  418. Air into engine is 130-150 deg
  419. Afr
  420. Engine Starving for air?
  421. Looking for help with one of my motors
  422. Bravo 1 upper gear set clutch timing question??
  423. oil temp pick up location
  424. Need your help! Engine bogging while accelerating
  425. What height should K planes be above the running surface. Pro and con for dif heights
  426. Offshore Mounts
  427. 07 496ho swap. Tach does not work. Need HELP!!
  428. Ball park how much does a pair of 350 hour Mercruiser 575 SCi go for?
  429. 1993 454 Magnum - Proper Engine Temp?
  430. Oil psi sender Question
  431. Exhaust Tips
  432. 1992 Fountain 32 Fever
  433. Identify these sea strainers
  434. pressure treated wood
  435. 1998 baja 272 502mpi top rpms
  436. Value of 525 log block
  437. How to cannect throttle shift cables To zero effort morse controls
  438. Hardin Marine exhaust
  439. Trouble Starting
  440. What do these tail pipes belong to?
  441. Gauge pointer oops!
  442. 2003 496 HO Fuel Pressure Issue
  443. Sea Strainers
  444. Lexan thickness
  445. 525 efi rebuild cost
  446. Batteries
  447. 496Mag pinging/detonating
  448. Carbed hp500 fuel pump
  449. Does when in forward but not reverse
  450. Anything I should do before rebuilding bw 71c 1:1 powered by 454 efi mag?
  451. Codes 42 and 43 on 502 MAG MPI. 1995 SN OF764XXX
  452. Pfm inercooler's
  453. 2006 Seadoo GTI 4-Tec
  454. Mercury Racing 600sci oil pressure problem
  455. Fuel pick-up setups
  456. TRS to Bravo Flywheel help
  457. 2004 Merc 575 warning siren won't go away
  458. lowrance 3500 depth finder?
  459. 502 MPI 415 HP cam upgrade
  460. Mercury 525efi wont rev over 4000rpm
  461. 502 MPI stumbles/dies at idle
  462. Pair of 500 hour 1999 502's needing(i think) new manifolds
  463. Timing On 1996 350 MAG GEN+ 300HP
  464. Dominator old vs new
  465. Jetting, Power Valves, AFRs --------
  466. Engine Sound "management"
  467. Dash Switches Replacement
  468. Dominator Carb tuning
  469. rapidly fluctuating temp gauge - SBC
  470. What is a good GPS app for my Android?
  471. Mercruiser 496 HO Alarm beep
  472. 350 MAG upgrade
  473. USCG - friendly fuel pump setups--- EFI into carbed boat
  474. Volvo penta 4.3 gxi
  475. Honest Motor Rebuilders
  476. tether clip, where do you get these?
  477. Plug question on 906/062 SB Vortex heads
  478. 5.7 Tuning Help!
  479. Hp 500 EFI Timeing How Much Is To Much?
  480. 525 SC spark issues
  481. Maiden voyage.
  482. Better cam
  483. Rough HP / Torque Estimate?
  484. '96 Mercruiser 7.4 LX (FI) Water Pressure Gauge, Info. Request
  485. 871 blower rebuilt spec
  486. cougar mtr 27 1988
  487. Mercruiser 502 mpi mag rich idle low vacuum new rebuild
  488. Liquid speedometer
  489. What kind of exhaust do I have, and what are options for silencers?
  490. Do all 496's have water pressure sensors ?
  491. Drives not even height, bravo 1 adjustment
  492. Need help...engine hesitation while accelerating
  493. New 502 engine shuts off in Base Timing Mode
  494. overdriven vs underdriven blower jetting
  495. Mounting remote PS reservoir
  496. Head gasket?
  497. 2 beeps every 2 minutes on Mercruiser 5.7 mag
  498. oil thermostat opening temperature is appropriate?
  499. Ignition Boxes
  500. Procharger problems