View Full Version : General Q & A




  1. 525 EFI H2O pressure?
  2. oil temp
  3. Merc 5.7 2bbl 1998 unique concerns.
  4. Replacing dipstick tube in 454
  5. Oil pressure problems!
  6. 454 to 502 repower suggestions
  7. PBM/Erson rods and cranks, comparable??
  8. 500efi overheating hot port header, help
  9. jet size
  10. Motor question for the Guru's...
  11. HP 500 carb fuel mech pumps
  12. Intake to head sealing issue question
  13. Collapsed lifter, bent pushrod
  14. anyone make hinge pin covers?
  15. Value 26 Prowler
  16. Ride quality older 38's which ones to look at
  17. need HEI DUI distributor info
  18. Hardin Marine - Hurricane Lite 525 Headers -- who's got 'em??
  19. solid or rubber prop hub???
  20. 525sc conversion
  21. 7.4 freshwater cooling
  22. Lower than I like Oil Pressure
  23. marine a/c units
  24. aftermarket mechanical fuel pump
  25. need help with code 42 on V6
  26. O2 guage
  27. Bravo 1 Vibration in forward drive not reverse??
  28. Dual trim pumps, one switch?
  29. Remote trim switches
  30. Reading Starts Me Thinking - More Power
  31. Water in fuel lean condition.
  32. Low oil pressure in brand new 502 efi
  33. Serpentine crossover kit
  34. power gone from my 8.2 mercuiser
  35. Moisture in valve covers with oil thermostat?
  36. Power steering leak
  37. 500HP carb- synthetic oil?
  38. oil spray from the front of a new 502 motor custom built
  39. Intake ?
  40. Swain Tech PC-9 Piston Skirt Coating
  41. 81 Formula, both alternators do not work?
  42. Water pump shaft seal
  43. Oil filled bilge - need advise please !
  44. how do you align an engine?
  45. efi vr carb
  46. Easiest way - converting 502 to EFI
  47. 502 mpi no inj. pulse on 1/2 the inj ?
  48. Fuel Injector Replace/Repair 805225A1
  49. Switch standard Bravo 1 to XR?
  50. has anyone ever powder coated blower pulleys
  51. PCM 555 codes
  52. 496 Mag HO front motor mount options?
  53. Camshaft sensor for 2001 496
  54. Murcury Racing HP500
  55. Old School HP500 water pump blown gasket (NOT SEA PUMP)
  56. Fuel tank level sender for formula needed
  57. Quietest thru transom exhaust setup
  58. Oil pressure gauge?
  59. Sloppy steering on bravo want to add hydraulic steering
  60. Which brand do you like?
  61. Merc 5.7 - 260hp
  62. Rapid beeping?
  63. Nordskog sending units?
  64. Autometer Gauge Connections
  65. prop slip?
  66. 781 heads best mods
  67. 38 Fountain fever wind deflecter /where to get one?
  68. How to tell the diffrence between a bravo 1 and 2
  69. any holley TBI experts here?
  70. Cam question
  71. Stupid cam shaft idea? Serious question
  72. Jetting starting point?
  73. drive position indicator - cable type
  74. gen 4 gen 5 question
  75. 1986 Wellcraft Nova III opinions please
  76. Oil sending unit and -----?
  77. 781 bbc heads from auto?
  78. Voltage regulator?
  79. 502 Mag Mpi Issue
  80. Measuring Compression Ratio
  81. Any good internet dynos??
  82. Raylar 496 HO upgrades
  83. 502 500hp efi sumble /stall
  84. Good oil pressure sending unit
  85. Stock 330 fuel pump question
  86. Long or short risers needed for this cam?
  87. Mark IV 502 Mag Hole In Piston And No Oil Pressure Help!
  88. 1000 Islands Poker Run Who is going?
  89. I need 1 set of Stainless Marine Exhaust for a SBC. Who's got the best price?
  90. Sea water/fuel pump questions. Leaking oil.
  91. PowerQuset Interior Lights - HELP NEEDED
  92. Could backfiring cause this?
  93. 454 Cam selection down sizing?
  94. if i had water in bravo one fluid...
  95. csm with vinylester
  96. Mercury efi to holley efi. How to get the correct throttle throw.
  97. electric circulating pump??
  98. Iac for 97 454 mag MPI's part number anyone know.
  99. Q-jet jetting help please
  100. Exhaust Riser gasket?
  101. guys I need help please 496 ho surges almost dies...
  102. Helm joint replacement?
  103. Any A/C techs on Long Island?
  104. EMI Thunder Exhaust On Stock 6.2s
  105. Serpentine to v-belt
  106. Strange MPI problem....
  107. 525efi milk shake
  108. 350 mag miss HELP please
  109. engine fault code?
  110. What thermostat housing for closed cooling system??
  111. blowers
  112. Hard steering at speed..
  113. 502 mpi mods......
  114. Fuel Delivery Issues
  115. Need part # for seal on water pump.
  116. Another newbie prop question
  117. 1997 sv24 challenger boat
  118. MSD Distributor
  119. Help! Merc s/c seals & bushings
  120. Posting pictures with an I Pad
  121. Gen5 to gen 6 have had nothing but problems
  122. Need Torque specs for top two bolts on gimble
  123. 280 Tabs to 380 tabs
  124. Marine Machine Hardware
  125. Small water leak on a XR Drive
  126. Black hose water drain system 496 HO
  127. Solid Roller Cam Worth it??
  128. Weak Starting - Ground?
  129. HELP!! 1996 Baja 302 windshield broken!
  130. circulation pump failure???
  131. How much hp will this build produce
  132. Power steering not working replaced parts...?
  133. Motors marked "BRE 168" any ideas?
  134. square k planes
  135. Simple oil cooler upgrade
  136. Prob and drive height suggestions for Donzi 25zx w 625hp
  137. vacuum pump, blown big block
  138. Merc 502 efi code 23 iat censor
  139. 500 efi exhaust issues
  140. Aluminum Intake manifold + salt brackish water
  141. Mercruiser Automatic Transmission
  142. Where's oil thermostat on merc 525 please
  143. What's considered too much oil pressure?
  144. Melting exhaust boots but engine not running over 180!?!?
  145. milkshake clean up
  146. Spark Plug Gap
  147. Benefits of quad rotor
  148. Any Fast 22ft Stingrays maxims out there??
  149. Distributor housing oil boss
  150. Building a new trailer for a 87 Midnight express 37'. Need help!
  151. Cast crankshaft OK?
  152. Reversion possibility question on SBC with XM270HR cam
  153. Riser gaskets...which one?
  154. 502 MPI w/cool fuel return line fuel flow
  155. Best way to clean the outside of an engine covered in oil?
  156. Replacing MEFI1 with ?
  157. Mystery Piece of Stainless in my Exhaust Tip - please help identify
  158. 8.1 oil bypass valve
  159. Stainless vs brass sea pump
  160. Longevity MIG welder
  161. crane 741 cam and stock roller lifters
  162. 502 fuel injected spudders and dies randomly
  163. Mercrusier 350mag w/Bravo 1
  164. Silent Choice Exhaust not opening.
  165. 500 EFI Powersteering pump defect ???
  166. Pressure test headers question
  167. Trim Tab screws ...kinda came out ....?
  168. Cam recommendations for these heads?
  169. 525 vs 496HO
  170. 454 EFI making a sqealing sound
  171. Mini Starter
  172. Fuel level in cool fuel module 496 HO
  173. 38 Fountain Lightning Worth It or Not ?
  174. EGT ranges procharged carb 555
  175. Hydraulic Ram...Who makes this?
  176. Bad powersteering pump?
  177. Liquid filled water pressure gauge problem
  178. 496 HO in-line fuel filter
  179. Using A MSD Box With Stock Merc Distributor
  180. Engine cover help
  181. Engine trouble shooting help needed.
  182. Any feedback on Venture aluminum trailers? specifically the tandem 5k axle 8725
  183. crank choices
  184. What do you clean your boat with?
  185. Installing water pressure gauge
  186. Oil cooler suggestions for 468 bbc
  187. Value of a mark iv standard 454
  188. Billet serpentine pulley 502 MPI
  189. Mercury Zero Effort Throttle Wiring
  190. Power Steering issues
  191. Choosing an oil pump
  192. Screws for exhaust tips?
  193. Looking for an engine builder in South Florida...Who do you know?
  194. OX66 Outboard gages to Gaffrig
  195. 454 Mag MPI not revving.
  196. Heat issues help.
  197. Old merc 90 outboard question
  198. Replacement iron heads for Edelbrock RPM performer
  199. Trim Tab Cable Help
  200. Mercruiser 6.2 Upgrades
  201. 704ci Motor Help
  202. 137-9400 mayfair steering
  203. Carb help
  204. Heavy duty shift cable??
  205. Motor Shut Down Filter/Pump/Other
  206. intermittent nav lights and fuel gauge problem?
  207. Baja 260 with 454.... Has mufflers and would like to remove them.....
  208. Gen IV 502 No Oil Pressure..... Help
  209. Timing question..502..
  210. 525 SC fuel problems
  211. hesitation, intermittent backfire etc
  212. When will thes 525s require work?
  213. Running hot according to the gauge.....454
  214. Prop slip calculator
  215. wiring help
  216. Need VDO Temp Sender
  217. New engine in Formula, more problems then a math book!
  218. 502 mpi v-belts part numbers..
  219. TRS transmission problems
  220. Impeller problems
  221. 496 mag help
  222. Size of harmonic balancer pulley bbc?
  223. How fast is an 88 scarab 1 with an efi 502????
  224. Mercruiser 5.7 efi fuel pressure kit from Autozone
  225. 502 mag MPI starts then stalls after replacing cap, rotor, wires and exhaust!
  226. Just got a noise ticket tonight - need options
  227. Broken dip stick tube on my 260 Merc
  228. 454 oil burn... questions on what to check first
  229. Throttle / Shift Controller - Sea Star or Mercruiser
  230. Thru hull tip internal flapper broke
  231. 496 8.1 Timing cover and gear question
  232. LED Gauge Upgrade
  233. 29' baja is shift cable longer with an imco extension box on the drive
  234. ignition troubleshooting ??? help please
  235. External voltage regulator wiring question
  236. 525sc upgrades for more hp
  237. HP 500 intake grommet??
  238. water in oil on fresh rebuilt 468 with m1 procharger intercooled.
  239. power steering pump question..
  240. 502 Catastrophic Failure!!! Why does this happen?
  241. trs to speedmaster
  242. Screw in fuel sending unit
  243. 496HO manifold over heating
  244. K-Planes Bolt Length
  245. Leakdown Test vs Compression Test? Help with a used boat.
  246. Circulating Pumps on 600sc (Convert to X-Overs)
  247. A/C questions
  248. 525 EFI Oil Pressure to High at Idle
  249. Rough idle?
  250. Fuel pump and delivery
  251. Hairline crackin one blade of stainless four blade prop
  252. power steering only works at speed
  253. 1 merc. 700 keeps vaporlocking
  254. New Mallory Ignition, no spark
  255. best replacement trim tab cables for merc k=planes?
  256. 32 fever with small blocks
  257. Feather throttle to keep running until reaching operating temp
  258. Air Fuel ratio
  259. How much HP? on my 454
  260. Comzilla intercoms
  261. Part # for 500 EFI impeller
  262. If you had a choice which one
  263. 1998 Mercury 250 EFI Factory Shop Manual
  264. B&M Blowers 174 type. timing issue?
  265. help! info on powerquest
  266. manifolds length
  267. Dumping cooling water, lightning headers.
  268. silent choice, issue or something else
  269. I.M.P Viper 310 help
  270. Formula 233
  271. I think I stuck a valve
  272. plug gap
  273. Question about GMPP 502ho crate engine.
  274. Shop Labor times to Pull a motor
  275. Hyd steering hose??
  276. 525 Oil Temp Sensor
  277. Carburetor Help
  278. Mefi 3 ??
  279. 502 dies at wot
  280. Help Please!!!! 88 Four Winns Liberator 211 is SLOW!!
  281. Oil Temp Issues
  282. Another 525 Header Issue
  283. 496HO: would IAC cause this? 1 engine lagging intermittently lagging 100-400 RPM
  284. 525sc idling at 180* rising to 210*
  285. New GM 502 Vibration above 1500 RPM
  286. Whats TO HOT FOR OIL TEMP
  287. Right thrust washer? Hub?
  288. Firepower control box
  289. Gen 4, 5 and 6 GM heads same plug reach?
  290. over cam'd motor or pump problem?
  291. Need help with Kohler 5ECD Generator...
  292. Russel Performance AN swivel fitting leaking
  293. Mercruiser BBC front engine mounts 79550
  294. A/c unit help
  295. 350 mag mpi won't turn off???
  296. is this a sign that the hull was rotten?
  297. 2 Alternators to choose from
  298. blower size help
  299. Replacing stock thermostat housing with Stainless,,,,,
  300. Mercruiser silent choice
  301. How often to clean the air intake 7.4 mpi
  302. Mercruiser Rev Limit Ignition by Firepower
  303. 496 whipple boost
  304. Cigarette 24 info
  305. Led Cockpit lights
  306. Exhaust Problems
  307. Cobra outdrive not pumping water
  308. Trim not moving evenly
  309. 502 water reversion
  310. Ultimate Warlock 24' Euro
  311. Alpha hit something no forward or reverse
  312. FAST Programmable EFI
  313. Oil foaming out of lower unit trim pump reservoir only while trimming lower unit.
  314. Loose/missing exh flapper
  315. Engine won't get boat on plane - ignition issue?
  316. blown 900 ate a distributor gear over the weekend, what now......
  317. Cost to rig a new hull?
  318. Outdrive Control Box
  319. 502 ss trying to get a hold of u bro ??
  320. Morse Controls
  321. Mercruiser Head Gasket Sealing
  322. Why no oil cooler 350 mag MPI
  323. Go Fast needed for a wedding
  324. Noise at Higher RPM's..... Details inside
  325. Rooster tail fittings on Normal drives - What and where?
  326. Removing compass
  327. Another water in oil milkshake thread
  328. Water in motor..need help fast!!
  329. Head Gaskets...head bolts..
  330. Baja 252 motor help
  331. When started, EFI motor will not idle below 3000 rpm
  332. Smart craft trim limit switch
  333. steering question
  334. Serp belt tension
  335. Lubricant for silicone exhaust hose?
  336. Painted boats hull cleaner?
  337. Scratched CMI polished Sport Tubes
  338. corsa solenoids ratling when diverted to prop
  339. wiring questions
  340. timing chain question
  341. transom assembley help
  342. Pondering the thought of doing a LS motor.......
  343. Any wlders in the house?
  344. Junk VST Electric Fuel Pump
  345. Hardin Gen 7 Sea Pump Install
  346. Motion actuator for power bolster seat, I need one from a Fountain or other boat!
  347. New engine ready to fire but WONT! Expierenced techs Please Help!!!
  348. Steering leak at the helm
  349. Boost referencing carbs
  350. recommended manifolds for 540 tall decks 600hp innovation marine
  351. twin engine fuel burn from side to side.
  352. Drain plug adapter
  353. 496 ho
  354. 03 496 ho double beep
  355. Horrible Idle on a holley 800..
  356. Smallbock oil adapter
  357. WTF,, does anyone make a tall life or ski vest for guys 6'-6'+
  358. 900 low oil pressure and cold filter after oil change???
  359. Recommended GPS with depth capabilities ?
  360. more HP for 502 mpi
  361. Lake Texoma Eating
  362. Running rough at low RPM after warmed up
  363. HP500/ BBC short water pump part#
  364. 502 MPI Surging over 4200 RPM
  365. New Oil Coolers? Yes or No?
  366. Gaffrig oil pressure sender
  367. Merc 7.4 Gen V clicking noise
  368. FAST Air Fuel Meter??
  369. RPM Drop in 1 Engine
  370. 12V DC Air Conditioner - Anyone have any experience with them?
  371. 496 with Whipple
  372. Gen IV Heads On Gen V Block Coolant Port ?
  373. Ethanol resistant fuel line?
  374. motor swap, now gauges dont work
  375. flame arrestor
  376. Bore notching 4.310 bore
  377. kiekhaefer trim tab manual or information needed...
  378. Throttle response.
  379. Anyone noticed slower speeds with the higher air temperatures?
  380. Heat Alarm wire..
  381. 1999 Donzi 26ZX performance results with new 502
  382. 600sci Impeller DIY?
  383. Replacing trim and drive indicator cables on Bluewater Performance panel HELP!
  384. Who designs custom dashes for older boats?
  385. Seeking a brochure for a 20 foot Cigarette
  386. Cast Iron manifold -> Stainless exhaust pipe
  387. Valve cover removal with exhaust on?
  388. Mando alternator wiring....
  389. Merc Racing 525EFI. SAE or Metric fasteners?
  390. Dana Exhust
  391. Replacing 502 with 496s
  392. Replacing 555 on 496 with MEFI Controller
  393. Exh manifold leak test w/acetone
  394. single 4150 fuel feed recomendations
  395. running hard with or without Silent Choice open
  396. This pizzes me off! Who is CP performance trying to kid
  397. Size of hose on speed master 3
  398. Swapping to a sea pump on sbc...
  399. anyone have 500efi valve cover baffle pics?
  400. fuel/water separating filters
  401. Pump size nozzle on a stock HP500 holley 850..
  402. Sierrs f/w sapartor
  403. Temp problems with 27' Advantage Victory
  404. Mefi 1 ecm bad, ideas??
  405. Need some help guys! Just bought a new boat.
  406. Dual Carb Adapter Gasket On Blower ?
  407. Skag repair on Sportmater lowers
  408. 1997 Gen VI MPI
  409. L-29 heads question?
  410. 7.4 MPI Vapor Lock and "jip joint gas"
  411. Oil cooler location and funny story
  412. exhaust manifold
  413. Oil Cooler Line Diameter
  414. 454 massive carbon build up on spark plugs back of the boat is covered in suit
  415. best prop for 26 Daytona
  416. 7.4 330 oil leak under power?
  417. Baffled by apparent reversion issues with Lightning headers and mild cam
  418. Changing oil with engs out
  419. Motec display with smartcraft?
  420. 525sc died at 70 mph no spark
  421. Bravo one trimming noise!
  422. Holley power valve sizing.
  423. ( A/F ) air fuel ratio for NA 350 vortex
  424. 330hp to 350hp vortec 454
  425. Engine Weight ?
  426. Fuel leaking out of vent ??
  427. Engine Oil Overfull (Due to extended high RPM runs)
  428. Intake Manifold Oil Leak?
  429. 4 Blade vs 6 Blade.
  430. Geico, Seaworthy Ins, Any Horror Stories?
  431. auto technician needed
  432. trouble with 525 sc
  433. looking for two pair of 4.5 flapprs for myexaust p
  434. 2004 47 fountain oil pressure sending unit
  435. Need opinions/suggestions 12volt battery system
  436. 525EFI water pump
  437. Gil Oil coolers
  438. Turbo question! Advice needed
  439. Dyno Day! Question for engine builders - A/F correction factor for dry dyno headers?
  440. 496 HO 2004 - Shutting down when throttling down
  441. anyone running a 5 blade with 525 efi?
  442. Corsa switchable exhaust swap.... Baja 272
  443. What are they worth?
  444. Ocean Marine AC unit reading HPF???
  445. Recommended oil for my 7.4
  446. Need advice about sea strainer on a superboat
  447. U joint shaft bravo2X
  448. 01 38 fountain lightning gen iv bbc what couplers and housings
  449. Anyone bought a new oil cooler that had something rattle in it?
  450. Power Steering Pump Pressure for Ram
  451. Where can I find a eddie marine part that is no longer made....
  452. Fuel Gauge...
  453. 525 Mercury Racing Engine pulling back once it hits 4200 rpm
  454. lying to your insurance company? ??
  455. TB IV and V ign info
  456. Where to place AFR sendor Or Stanless Marine Exhaust
  457. Backfire through exhaust on initial startup
  458. Hardin marine ?
  459. Spun Prop What Else to Look For
  460. EMI risers, cracked one
  461. 99 formula twin 7.4 mpi bIII vibration/hesitation help
  462. motion 30 vs spectre 30 ??
  463. how to I.D a 454 Magnum
  464. How reliable / durable is the Merc 6.2?
  465. Lost oil pressure
  466. Engine rotation
  467. Comp cams 212 Timing cover
  468. Drying out cabin carpet ??
  469. 502 mpi thoughts on pitching injection and going with the carburetor
  470. WPM Steering
  471. 144 blower on stock 350
  472. Oil Temp Question
  473. Here we go! blew up a blower motor
  474. Owners manual, 1991 Sonic 31'???
  475. Overheating problem-more challenging than usual
  476. Corsa quick and quiet exhaust mufflers
  477. gages
  478. Why jetting so staggered with a single plane?
  479. Anyone want a 2012 38' Powerquest? Looks like an auction for unfinished boat
  480. Carbureted 502 MAG Timing And Fuel Help Please!!
  481. Hardwall water hose
  482. Fuel pressure on carb 454
  483. MLS or Performance head gasket
  484. Dyed vinyl question
  485. 6.2 engine torque?
  486. Compression Test
  487. Finding Taco vinyl rubrail insert
  488. Stainless Braided Trim lines and Kplane line extending
  489. Problem !! Electric gremlin I think.. Help..
  490. Correct Flywheel??
  491. 496 Mag HO Rev Limiter ?
  492. Help with Warlock Performace Machine steering ram
  493. 7.4l 330 hp needs a new carb what do you guys suggest
  494. Replace silent choice on my scarab? or keep replacing seals?
  495. ethanol fuel messing up Gas Tank sending unit???
  496. Fuse or not to fuse "That is the question"
  497. Looking for Some Insight on Merc 500 EFI
  498. Where can I get exhaust block off plate
  499. 496 vs 540
  500. O2 sensor without drilling and welding Lightning headers