View Full Version : General Q & A




  1. How much reversion is too much??
  2. Gen1 Stainless MArine limitations??
  3. Four Winns Liberator 211
  4. Sc scoripion. Lots of questions
  5. Using freshwater flush port to winterize
  6. MEFI 4B CD or Download Needed
  7. 496 HO Question - What are these and how should they be adjusted?
  8. Give this 502/509 Combo Some Thought
  9. What Carbs would you buy
  10. Fighting a miss under load
  11. The curse continues... Brand new coupler slipping?
  12. Best Carb Spacer 4 hole or Open?
  13. Merc Smartcraft mpg... U.S. or Imperial?
  14. Water in hydraulic trim system
  15. Go badgers.
  16. US gasoline power beginner questions
  17. Heads/Cam or Supercharger?
  18. Water Traps in the Fuel Tank?
  19. best hole shot Trim tab position
  20. AFR numbers what's good and what's bad ..
  21. Bmax drives input
  22. gaffrig silencers
  23. 525 Edelbrock head
  24. 502 oil issue
  25. Setting the base timing on rebuilt 500 EFIs???
  26. 6.2 MPi
  27. Engine Air Temp
  28. Looking for engine builder in ct area
  29. Mercury 600SCI - Engine Fault - IAC Output
  30. Stainless marine exhaust converted to dry? Gains?
  31. Dyno... Marine trim VS Dyno (race) trim
  32. Upgrading fuel lines due to age and upgraded engine
  33. Repower/ long lock opinions
  34. Mercury 520 Performance upgrades
  35. 454 suddenly stopped, abruptly, would not even turn over. Took plugs out and
  36. Boat plugs out with pipe dope
  37. Boat plugs out with pipe dope
  38. Powerquest razor 22
  39. Aluminum heads
  40. Cam and valvetrain longevity....??? low duration high lift...
  41. Mercruiser 470 stalls after it has been warmed up. Wont idle under 2000 rpm
  42. Going from 5.0 to 5.7 or 6,2 SBC
  43. Opinions on rewiring engines
  44. Fluctuating engine temperature in my 2000 7.4 mpi Mercruiser Bravo 3
  45. 1075 sc cam in a 565 NA build
  46. How to clean oil coolers
  47. Need a boat brought to Florida from the NH area.....
  48. Mercruiser 7.4 LX MPI Intermittent Overheat
  49. Driving thru chine walk
  50. recommends on engine oil
  51. Lightning or GiL
  52. Alternator only charging one battery while running - Scarab 33 AVS???????
  53. Wow I heard of msd issues. But dam.
  54. How fast can I go
  55. 500EFI Help!
  56. Horsepower VS Torque
  57. What are you guys using for water PSI and vacuum line?
  58. Acceleration and efficiency
  59. Bravo 1 outdrive sagging help
  60. Spun Drive coupler (or whatever the proper name is)?
  61. Larson Senza Spectre
  62. 496 HO sounds much louder when cranking
  63. Anybody know where I can get a 500 EFI Rubber seal for Throttle Postion Sensor?
  64. Need Help finding Power Steering Pulley
  65. Typical places oil leaks occur in the port side rear of the engine
  66. smartcraft alarm question
  67. MEFIBURN tuning help
  68. Slight poping sound out exhaust. Comes n goes. See first post. Spellcheck
  69. Cause has developed slight piping ish sound.
  70. Faria gauges on early merc smartcraft
  71. SBC hydro locked, water in #1 cylinder
  72. 600SCi 5 beep alarm
  73. faria tach setting
  74. Loading up at idle
  75. water hose to helmut connection
  76. 500 efi dipstick loose
  77. 500efi help
  78. Water in oil.
  79. Turbulators for Gil exhaust
  80. AFR 325 flow sheets.... anyone ever flow these heads?
  81. Anyone run 108 LSA cams in boat before? 700 HP DYNO proven combos welcome...
  82. Worlds fastest boats
  83. late '01 496 HO poor idle/occasional stall in nuetral at idle only
  84. 350 Mag engine wake up
  85. 525 hp
  86. 32 fever steering cables
  87. Baja 232 Voltage Issue
  88. oil cooler with built in thermostat
  89. 2002 Baja 29 Outlaw Fuel Vent Question
  90. Header tube discolouring, what should I do?
  91. Wierd sea water hose problem
  92. How much timing advance should I run?
  93. Stainless Marine manifolds SBC power steering line in the way
  94. Loosing fuel pressure
  95. I'm cursed!
  96. Cams size
  97. shipping a outdrive
  98. 500 HP Intermiten Idle Issue
  99. show me your Fountain speaker locations
  100. 575 sci
  101. Older 575hp 540ci merc bulldog engine knocking
  102. 1995 502mpi won't start when hot
  103. New style and old style 525
  104. Bravo 3
  105. Detonated piston & blew head gasket. Now what?
  106. frictional losses of 4.25 stroke motor vs 4.0 stroke
  107. efi for supercharger.
  108. Reoccurung water pump failures...
  109. Mag efi
  110. Mercury 525 Rocker arm replacement
  111. Oil pressure flutter at higher rpms.
  112. Do anti-reversion dams work?
  113. Replacement steering Verado 400R
  114. Hydraulic Hatch Actuator
  115. Oil Pressure Bypass Valve Question
  116. slip %
  117. Pre-Filter Oil Filter Screen - YEA or NEY ?
  118. Power steering pump fitting Aeroquip?
  119. Catalyst elimination for "test purposes"
  120. whats the torq spec for bravo transom plate?
  121. Msd total timing procedure when locked out
  122. A little more Tinkering
  123. 502 MPI intermitant no start when hot.... not fuel prob
  124. Fuel Coming out exhaust
  125. Hammer knocking noise when in gear over 3000 rpm
  126. Will MSD digital 6 work with thunderbolt distributor?
  127. Holley Commander 950 mpfi won't fire!
  128. Thunderbolt V ignition, will big block module work on a small block?
  129. need part # for hose transom to sea water pump
  130. GM Fastburn heads, any experience with these?
  131. Weber carburetor
  132. new 540 water in oil
  133. Vessl View & DTS
  134. Push rod retainers.
  135. 5.7 timing with comp 270 cam
  136. CMI headers. Are they fixable?
  137. EFI Systems
  138. Impeller
  139. Chaparral Villian SLV Speed Capability
  140. Motor Issues
  141. procharged 454 Mag rebuild upgrades ????
  142. Heat exchanger help
  143. Rosella Oil
  144. converting my 350 cid merc. 320 efi's to carbs. what jet sizes?
  145. Plug for ?
  146. 500 efi 50lb fuel injector
  147. 502 mag loads up under load.
  148. Outdrive line help
  149. drive swap alpha 1 gen 2 to bravo one
  150. Blind mounting swim ladder? - 89 Baja 226 Islander
  151. Advantage 27' rear seat removal
  152. Where to get gaskets 5.7 mag gen +?
  153. Imco riser gaskets
  154. 502 build
  155. External steering on a B1 vs XR
  156. 496 intake manifold gasket
  157. RPM Lug
  158. Dominator on 4150 sniper jr with spacer?
  159. 2005 Mercury Racing motors one is low on power
  160. 496 Rockers
  161. More HP in 7.4 MPI's?
  162. Bad Vibration, need help troubleshooting
  163. Hours vs mileage.
  164. Gear oil bottles
  165. Tuning 350 Vortec w/ LT4 Hot Cam & Holley 750 Double Pumper
  166. Anyone have oem MEFI1-4 tunes for 502MPI?
  167. Rpm issue ideas.... I'm lost....
  168. Any recomendations for a Surveyor near Gainsville Ga?
  169. Pontoon steering help
  170. 7.4 MPI low power
  171. Need help with block serial numbers
  172. Sea Strainer question Bravo Hose size?
  173. Stuck cabin door.....
  174. Loss of oil pressure after rough ride
  175. 32 fever sealing
  176. Supercharger Questions
  177. Mercruiser Alternator Upgrade?
  178. WTH is going on with my oil temp
  179. What is fuel pressure spec on 2001 7.4 454 mpi Mag?
  180. 540 NA MEFI 3 Intake Vacuum Question
  181. Help with prop
  182. Opinions on 1989 575hp bulldog 540ci and ssm 3 drives?
  183. 2003 496 HO dreaded two beep alarm
  184. 502 MPI Low Fuel Pressure
  185. 300xs ECU
  186. Strange noise... please help!
  187. How can I tell if my motor is inter or ext balanced
  188. Need a trim actuator clap
  189. 1987 454 merc main harness
  190. Newb, sure its not the first time.
  191. what transom work is needed to convert TRS to SSMIII drives?
  192. 600 sci
  193. lunati cam 20010666
  194. lunati cam 20010666
  195. Flush OMC 460 King Cobra - raw water pump in lower unit.
  196. draining the block - easier way? 1/4" valves?
  197. Water Restrictors
  198. need help replacing a harmonic balancer
  199. gen VI 525SC pistons
  200. Identifying 502's
  201. Suction hose
  202. speed gain
  203. Bell housing mounted starter
  204. Russell Check Valve VS. Anti-Siphon Valve
  205. 500efi with blower shop 250s
  206. Dyno sheet
  207. Anybody use Anthony's Marine Engines in St Pete?
  208. Sonic with a 496 engine noise
  209. Help! 502 efi keeps stalling
  210. 502 efi temperature sending unit?
  211. Please, need help w/ mefi1 502 mpi code 21 and 42
  212. Rebuilding 502's
  213. 540ci 700hp build recipe
  214. 496 Ho question - fuel leak?
  215. 8.2 EFI fuel pump question
  216. Distributor info
  217. 496 Mag HO - slight miss, poor mileage, loss in rpm
  218. Quadrajet flame arrestor
  219. bomar hatch latched pulled off glass
  220. Which is easier?
  221. Plumbing water hull pickup or drive pickup?
  222. Replacing exhaust tips
  223. Main Bearings ?? Mercury Racing
  224. B&M 250/420 Idler Question
  225. Target Air Fuel ration N/A engines.?
  226. 871 Blower experts CHECK IN
  227. Mercury 500 Sea water pump
  228. Water pump direction 500HP vs 502 MPI
  229. 600SCI engine water Flow Issue
  230. So many threads on milky oil, but heres a bit of a spin
  231. Replacement MEFI 1 -- Any one know what my options are?
  232. Thunder powerboats
  233. HP500 Ignition Issues with Marine MSD Setup
  234. Cant trim under power??
  235. flywheel material and type
  236. Wiring the drive trim switch on the gaffrig throttle...is a fuse needed?
  237. 502 MPI build help
  238. Water Jacketed vs Water Injected
  239. Rinda Scanner Adapter Won't Fit 525 Diagnostic Conn.
  240. Dyno tuning technic
  241. Small block ignition
  242. 575 sci piston
  243. Smartcraft gauge options
  244. repairing acrylic wind screen?
  245. 28 Nordic, 29 Warlock, 288 Sunsation
  246. Low budget 7.4 rebuild
  247. Oil pressure...
  248. Air into engine is 130-150 deg
  249. Afr
  250. Engine Starving for air?
  251. Looking for help with one of my motors
  252. Bravo 1 upper gear set clutch timing question??
  253. oil temp pick up location
  254. Need your help! Engine bogging while accelerating
  255. What height should K planes be above the running surface. Pro and con for dif heights
  256. Offshore Mounts
  257. 07 496ho swap. Tach does not work. Need HELP!!
  258. Ball park how much does a pair of 350 hour Mercruiser 575 SCi go for?
  259. 1993 454 Magnum - Proper Engine Temp?
  260. Oil psi sender Question
  261. Exhaust Tips
  262. 1992 Fountain 32 Fever
  263. Identify these sea strainers
  264. pressure treated wood
  265. 1998 baja 272 502mpi top rpms
  266. Value of 525 log block
  267. How to cannect throttle shift cables To zero effort morse controls
  268. Hardin Marine exhaust
  269. Trouble Starting
  270. What do these tail pipes belong to?
  271. Gauge pointer oops!
  272. 2003 496 HO Fuel Pressure Issue
  273. Sea Strainers
  274. Lexan thickness
  275. 525 efi rebuild cost
  276. Batteries
  277. 496Mag pinging/detonating
  278. Carbed hp500 fuel pump
  279. Does when in forward but not reverse
  280. Anything I should do before rebuilding bw 71c 1:1 powered by 454 efi mag?
  281. Codes 42 and 43 on 502 MAG MPI. 1995 SN OF764XXX
  282. Pfm inercooler's
  283. 2006 Seadoo GTI 4-Tec
  284. Mercury Racing 600sci oil pressure problem
  285. Fuel pick-up setups
  286. TRS to Bravo Flywheel help
  287. 2004 Merc 575 warning siren won't go away
  288. lowrance 3500 depth finder?
  289. 502 MPI 415 HP cam upgrade
  290. Mercury 525efi wont rev over 4000rpm
  291. 502 MPI stumbles/dies at idle
  292. Pair of 500 hour 1999 502's needing(i think) new manifolds
  293. Timing On 1996 350 MAG GEN+ 300HP
  294. Dominator old vs new
  295. Jetting, Power Valves, AFRs --------
  296. Engine Sound "management"
  297. Dash Switches Replacement
  298. Dominator Carb tuning
  299. rapidly fluctuating temp gauge - SBC
  300. What is a good GPS app for my Android?
  301. Mercruiser 496 HO Alarm beep
  302. 350 MAG upgrade
  303. USCG - friendly fuel pump setups--- EFI into carbed boat
  304. Volvo penta 4.3 gxi
  305. Honest Motor Rebuilders
  306. tether clip, where do you get these?
  307. Plug question on 906/062 SB Vortex heads
  308. 5.7 Tuning Help!
  309. Hp 500 EFI Timeing How Much Is To Much?
  310. 525 SC spark issues
  311. Maiden voyage.
  312. Better cam
  313. Rough HP / Torque Estimate?
  314. '96 Mercruiser 7.4 LX (FI) Water Pressure Gauge, Info. Request
  315. 871 blower rebuilt spec
  316. cougar mtr 27 1988
  317. Mercruiser 502 mpi mag rich idle low vacuum new rebuild
  318. Liquid speedometer
  319. What kind of exhaust do I have, and what are options for silencers?
  320. Do all 496's have water pressure sensors ?
  321. Drives not even height, bravo 1 adjustment
  322. Need help...engine hesitation while accelerating
  323. New 502 engine shuts off in Base Timing Mode
  324. overdriven vs underdriven blower jetting
  325. Mounting remote PS reservoir
  326. Head gasket?
  327. 2 beeps every 2 minutes on Mercruiser 5.7 mag
  328. oil thermostat opening temperature is appropriate?
  329. Ignition Boxes
  330. Procharger problems
  331. 496HO Double Beep Alarm
  332. 525 EFI rebuild
  333. 525 efi bore
  334. Help finding a used Thunderbolt IV V8 V24 module and wire harnes.
  335. Is my 500 efi done for the year? Got hot and now hard to start.
  336. 5.7 spark plug recommendations
  337. Michigan wheel ballistic xhs 4 blade any good?
  338. Looking for help on my 502
  339. Painting or protecting Mercruiser Gil risers
  340. 454 fresh water cooling
  341. Rock inside the lower ?
  342. Water pressure dumps location in plumbing
  343. 600sci/700sci Crank Position Sensor Code
  344. -2 Sports Master Lower with 1.36 gear ratio
  345. Timing settings
  346. bad motor?
  347. Pachanga 22 exhaust question
  348. Pachanga 22 exhaust question
  349. Anyone ever heard of an omega
  350. TRS Mercury-Mercruiser 62782A4 UNIVERSAL JOINT
  351. 850 sci - 1075 sci cam specs
  352. Water circulation with stainless marine manifolds
  353. Water in LH bank/manifod from no flapper, what to check?
  354. procharger vs tbs250
  355. Milky oil
  356. Another day of great fun... maybe not so much. WTH?!
  357. starter fuse
  358. MSD distributor
  359. Pachanga 22 Build.. Help?!
  360. Audio warning system
  361. Using Thunderbolt V with 502 Gen 6 and Procharger M1-SC in the Land Down Under
  362. Any diagrams around on how the water plumbing goes for the engine and chiller?
  363. Where can I find this plastic fitting that goes in valve cover to flame arrestor.
  364. bad 525 EFI heat exchanger ?
  365. Engine Rebuild -- What's Actually Involved
  366. What fuel line can I use?
  367. Oil Temps
  368. anyone ever have a sound like this ?
  369. weighed the boat today
  370. Engines shut down at 4300-4500 rpm
  371. Blown coupler or spun hub .... Before I bring to the shop
  372. Jetting question. Primaries larger than secondaries
  373. Thunderbolt 5 replacement - MSD ?
  374. Repair bad ECU V6 MPI PCM 555
  375. Taylor Made Fenders/Bouy Warranty
  376. PCV Hose question
  377. Where's the best place to buy SB Vortex 906 heads?
  378. Dart or Chevrolet Performance??
  379. I need a IAC part number
  380. I have a merc 525 engine miss at 4800
  381. water pressure drop with rpm increase?
  382. HOLLEY EFI - THIS is real wierd
  383. Engine OIl Prelube Plumbing
  384. Hydraulic Roller Lifter Lash Settings with Shaft Mount Mockers?
  385. Fume sensor possible error
  386. Merc 496 Electrical Issue - Ignition
  387. 454 Mag Leak/Compression numbers
  388. Thread lubricant, sealents and gasket tack for upper end assembly
  389. machine marine steering ram disassembly
  390. Valve "stuck" in 525
  391. are top mount starter flywheels different
  392. 2000 Fountain Fever Bilge pump
  393. 871 rear bearing plate sealant
  394. High Oil Temp - Chasing a ghost/sender?
  395. Titanium Intake valves $$$$
  396. MLS Headgasket measurement VS Bore size and availability
  397. mercruiser computer reprogram
  398. Looking for more horsepower input
  399. Another 525 water pressure question
  400. Blew a trs today
  401. Rattle from back of motor????
  402. Was having a good day until...
  403. Do tall decks have raised Camshafts?
  404. 525 header getting hot
  405. Intake air temperatures with blowers.
  406. Thermostats in a blown application?
  407. procharger innercooler problems
  408. Off the shelf Cam- Dyno results
  409. Will Ported 308 Dart Iron Eagles work on a 565CI or even 582Ci motor?
  410. Testing fuel tank
  411. Will Ported 308 Iron Eagle Dart heads work on a 565?
  412. Bravo x to Bravo XR exchange?
  413. Help with trim tab installation (correct angle)
  414. Need prop selection HELP 99 Python.
  415. mercruiser power steering issue bravo
  416. Identifying a cam
  417. Electrical help!
  418. Bleeding Air from my hydraulic steering
  419. TPS Voltage for idle on a 525 efi?
  420. Sierra oilpan?
  421. Let's talk ignition
  422. new to owning a boat got a boat that needs love coming
  423. NA 555 build CR
  424. 496 starter bolts?
  425. clearence issues with 20.5 sport skier 496 need help
  426. Trim tab angle question (how high is high enough?)
  427. Water pressure issues!
  428. Boat stalls out around 3000 Rpm
  429. HELP! 87 wellcraft nova wiring schematic needed
  430. sierra extreme lower shift cable - know issues? mine broke
  431. Trim solenoid question????
  432. Jesel Belt Drive, Crank turns Cam and Belt Stationary
  433. 502 Dead Stalls above 2400 RPM - Need Help!
  434. Jesel cam belt drive in a marine/endurance application.
  435. 2005 525 starting issue
  436. Strange drive noise
  437. Holley 800 DP running rich at idle - causes?
  438. Which one?
  439. Proper cam choice. What does it mean?
  440. Spark plug gap confusion, 502MPI
  441. 575SCi
  442. Has anyone used Ethanol Shield?
  443. Add on steering issue. Please help!
  444. Have I been Hoodwinked?
  445. Need Help with Location of Thermostats in 500 EFI
  446. Lazy RPM on 396 stroker chevy
  447. carpet
  448. Trim pump fluid?
  449. looking for piece that goes on back of m3 procharger
  450. 496 ho surging/rough idle
  451. need mechanic, cape canaveral area
  452. 1997 2.5 260 EFI idle and start issues
  453. Filling gear lube reservoir
  454. Brand new quick fuel carbs engines won't run
  455. Need help identifying a motor - 572 or 454?
  456. clear (dry or glazed) plug fouling??? Stumped....
  457. Steering cable and helm upgrade, has anyone used the HPS or EXTREME (seestar teleflex
  458. What are symtoms of power steering pump going and/or not working well??
  459. Mysterious oil leak. Gen VI 502 crate motor
  460. West Coast Offshore - Anyone know anything about them?
  461. Any speedo tube fixes
  462. Bravo Rattle - Alignment Woes
  463. 502 injectors
  464. Stainless marine Water pressure test pressure?! Help!!'
  465. Installing a dual relay assembly to speed up my actuator (confused on switch wiring)
  466. 500 efi noise re-visited
  467. Is there a special alignment tool for this coupler?
  468. Working on solving water pressure problem
  469. Ignition issues 420 merc
  470. How do you stop reversion?
  471. 3k RPM+ Bogging Issue '96 7.4LX MPI
  472. Stanless Steel Welding- in Northern Indiana
  473. 2007 Suzuki DF250 milkshake
  474. Comp Cams - Issues with rocker arms, premature failure.
  475. smoking gun clear youre messages
  476. Question on aftermarket exhaust and risers
  477. 525 upgrade question
  478. Exhaust water flow question?
  479. water pressure problem
  480. any jet ski tech's here
  481. sunpad hinge
  482. 496 manifolds on a carbed 454
  483. New Gen 7 540 forged shortblock offering!
  484. Drones in Zaks bay NY
  485. NGK 5673-7 or -8?
  486. 496 HO coolant?
  487. O2 sensors dead after short use???
  488. Dual helm steering problems
  489. Fuel presure on 496 ho
  490. Drive wouldnt lower or raise
  491. Aeromotive Fuel Pump - Losing pressure
  492. Performance problems
  493. 496 HO won't run above 4100 rpm
  494. Need Starter Advise gm572
  495. 500 efi will not rev beyond 4300 rpm
  496. 575sci running rough
  497. Another 496 alarm thread!!!!!
  498. Whipped charger
  499. Marine grade wiring?
  500. taking mild thunders advice