View Full Version : General Q & A




  1. 525 EFI Guru's need help!
  2. plenum gasket
  3. Bizarre Carb issue
  4. Champion plugs
  5. LS6 Block
  6. Gil wet exhaust tubes getting hot
  7. 89 baja 320force
  8. Will big block CMI headers work on stock 496?
  9. 700sci Fuel Pump blowing fuses, WHY?
  10. 500 efi ATECO head kit
  11. Merc ignition help please.
  12. 350 mag carb version roller or not ?
  13. While my motor is out....
  14. Is this a Cigarette
  15. Need Gauge Wiring help!!
  16. blower guys
  17. Help! 07 496 no crank no start
  18. Problem with McLeod Bolster- no power
  19. 38 Donzi ZR Tired of losing blades off my propellers
  20. Chasing a 300-400 RPM drop issue in Port motor!!
  21. Monterey by Seabring
  22. Gaffrig gauges/ closed or open??
  23. Supercat engine questions and ideas
  24. Adjustable windscreen?
  25. Wind storm boat covers ?
  26. Strering Problem
  27. 496 replacement injectors
  28. Permatex
  29. Morse tilt steering knuckle
  30. HP 500 camshaft's Do they have a fuel pump lobe?
  31. Motor and 500efi injection question
  32. Mechanical indicator help
  33. Cleaning vinyl?
  34. 36' Apache trim tab cables???
  35. 500 efi issues
  36. EMI Thunder plumping problem
  37. Intake valve, severe cracks !?
  38. Prop wont go any faster.
  39. Computer/Thermostat Question
  40. steering
  41. Hearing whistle when secondary's open???
  42. Corsa exhaust issue. Has to be a simple fix??
  43. 575 sci fuel pressure
  44. Corsa Quick & Quite diverter valve solenoid
  45. 89 or 93 pump gas
  46. 502 efi's water pressure gauge's
  47. O2 Sensor bung installation CMI Etops
  48. steering actuator
  49. Does 93 octane leave chronic soot on the transom?
  50. 1989 scarab 21 excel motor ideas
  51. headbolts for 525 efi
  52. Pro charged 500HP, carb to EFI
  53. Switching from omc to merc, how hard is it?
  54. Starting Problems (Cranking Over)?
  55. Just can't catch a break
  56. Single engine/twin engine prop slip/speed
  57. Fountain shift/throttle-switch sides?
  58. Cobalt fuel pumps?
  59. what is a good qualit and resonably timing set and timing cover for a stock 1990 7.4?
  60. Boat handling issues
  61. looking for help, possible efi issue
  62. 525 cam sensor installation procedures
  63. 502 Mag MPI dies over 4000 rpm/full throttle
  64. Changing a fuel gauge?
  65. 350 Mag MPI WOT bog??
  66. What's the magic spot for a thru hull water depth gage transducer on stepped hull?
  67. Mississippi launches
  68. What do these Spark Plugs say??
  69. 502 EFI intermittently chokes and sputters, drops rpms at cruise speed, stalls
  70. Oil pressure sender 500 EFI
  71. Gauges
  72. Bravo 1 Drive
  73. Pulley slip on ribbed serpentine blower pulleys
  74. 522 missing, bog
  75. Ignition Module
  76. Hp500 EFI injector issue
  77. 496 Temporary Overheat?
  78. Dometic a/c question
  79. Charging diagram twin engine
  80. Replaced impeller 496 ho still no water pressure
  81. Potential Issues with 7.4 L Mercruiser (Year 2000) with Bravo I Drive
  82. Electrical question
  83. 502 quit on me
  84. Mercruiser serial number indentification
  85. What plug to run on a Gen 4 BBC 177 motor.
  86. Strainer cover won`t come off, wtf
  87. Yamaha 4.2 250hp
  88. apache scout motor height
  89. Gaffrig Gauge Questions??
  90. 454 Upgrades?
  91. Weird engine shut down last night 502 MPI
  92. Spinning hubs???
  93. 500 and 525 EFI Vacuum at Idle
  94. 496 Water Ingestion HELP
  95. SBC Valve Cover Clearance Issue with GLM Manifolds
  96. Small outboard question.
  97. Engine Oil Questions. What do you think i the best!
  98. Michigan Motorz Replacement Engine
  99. 300 Optimax parts
  100. inner transom plate
  101. Fuel system help
  102. drive oil in bilge...
  103. puke bucket on 583 ci
  104. drive off, vac and pressure test anything else?
  105. Another starter, this time ring gear also... advice while engine/drive are out?
  106. Standard bravo one sweptback serial number needed
  107. 1995 Formula SR1 has low compression - South Jersey
  108. Supercharged 350 tech advice needed!
  109. Power steering pump
  110. corsa exhaust max rpm
  111. High hour 502mpi mags still running good ??
  112. Oil Level Mystery
  113. Engine issues in my 98 Fountain... Please help!
  114. Anybody here a Dodge mechanic? have questions about a Journey in the fleet...
  115. holley jet sizing for my mild 355 merc ?
  116. Opinions on triples
  117. adjusting valves in 350 sbc
  118. ARP rod bolt question-resizing?
  119. First start up on my new big block :)
  120. 500 EFI Saltwater Questions
  121. 1997 STD 454 carb rev limiter?
  122. Quadrajet carb choke issue
  123. can only turn 4000 RPMS on a 500 EFI, rebuilt drop in
  124. Any experience with Raylar 103 Cams and/or Rockers?
  125. oil additive needed with mobil 1?
  126. 350 Mag Q-jet flooding through primary boosters
  127. Yes another 496 issue. possibly injectors
  128. Crank Driven Water Pump
  129. 2000 47 Lightning upgrading to 525efi motors... connecting to smartcraft? Help!!
  130. MercMonitor, Smartcraft, Vessel View...HELP!
  131. 1999 merc 7.4 mpi vi altinator output post bolt wearing hole in coolant hose???
  132. Too much pressure !!!
  133. Engine and prop set up
  134. Engine water and oil temps too cold
  135. what are the chance
  136. Distributor/ignition issues, need help diagnosing
  137. Hi Tek exhaust manifolds
  138. 525 efi intakes
  139. Video lcd Monitor Info
  140. Re-power with triples? Stagger twins? OR Twins with a larger cockpit??
  141. 1990 7.4L bravo 1 carb replacement
  142. BBC circulating pump
  143. adjusting flat tappet valves
  144. water temp sending unit
  145. Iac controller 496 ho & diacom test
  146. Carb Spacers and Jetting
  147. Help please, possible gas leak?
  148. Dennis Moore's Book
  149. Exhaust question
  150. 088 vs AFR 265 dyno comparison
  151. Need a new 502 BBC rear crank seal. Mine blew out this weekend. Who's is the best??
  152. Insurance company info need for boat Insurance
  153. Air Fuel Ratio Meters...who makes a cheap one that works well?
  154. 496 sportstube headers??
  155. Replacement headers for 525 EFI - Which ones?
  156. 502 mpi mag change to carb help!
  157. 6.2 MPI problems
  158. oil bypass valve question on gen VI engine
  159. Stuck valve on Mercury 525 EFI - cause ??
  160. Thinking about replacing the dash and gauges on my 35' Fountain Lightning
  161. RH vs LH prop??
  162. 496HO missing at 3,000 rpms on take-off after warmed up
  163. High hour 496 loosing power
  164. How underrated are INBOARD engines? Twisting 5600 with the stock props 32 fever
  165. Broke starter and ring gear
  166. 496 CMI twin engine install ?s
  167. 496 Mag filling bilge with water
  168. Looking to upgrade alternator on a 496 mag
  169. 502 Idling/throttle-up Issue
  170. Teague rockers cracking has anyone seen this...
  171. Scarab overheat issue new rebuild
  172. 2007 525 efi
  173. KAMMA boots
  174. Broken Pushrod ball
  175. NXT1 Transmission problem, Advice, Service Repair Manual?
  176. Going crazy on my Mercruiser 496, need Help!
  177. Valve adjustment procedure
  178. Flywheel On 496 Stroker
  179. Wrapping my 47 Fountain? Who in Florida provides a decent wrap and how much $$?
  180. 496 Coolant in Bilge
  181. Shop crane help
  182. starboard runing cold!
  183. need cam expert help
  184. Baja not charging acting funny!!!! Quick question think I fixed want thoughts
  185. Broken Pushrod
  186. upgrading cam on 454 mag crossram efi
  187. 496HO issues, help and feedback needed!
  188. Has anyone used AUTOTEC pistons?
  189. Teage Marine Camshafts
  190. Electrical Question for Wellcraft NOVA III
  191. Cam advise
  192. Goto guy for tuffest bravos?
  193. 500efi problem
  194. Power Steering Pump Issue
  195. Gen v 7.4 belt diagram
  196. Mod my 420 intakes or buy 8:71's??
  197. Too much water pressure
  198. Header Temps ?
  199. 502 Mag cooling system problem
  200. Lost forward/ reverse. Help!!!!
  201. Mild 350 cams
  202. tranny making grinding noise
  203. Need add on steering help ASAP so I can boat tomorrow
  204. Any dyno in central Pa./ ne Maryland
  205. Port engine still weak, advice needed. 2005 496 ho's
  206. Grease points on Bravo?
  207. Whats up with Revolution Marine?
  208. Mirage 202 with a 492?
  209. 496 ho question
  210. Stock 525sc's
  211. Steering
  212. 502 MPI Nightmare!!!
  213. I am thinking about freshening my blown 454 mags after the season
  214. 496 seawater pump
  215. Any pointers for rebuilding Borg Warner 72c transmissions?
  216. thunderbolt ignition
  217. Engines won't turn more than 4200 RPM
  218. Name this part off of BBC whipple charged engine
  219. Mercruiser 454 MAG MPI weak!! help!
  220. 454 mag carbed timing??
  221. dominator carb question
  222. High idle trouble. Lookin for help
  223. Engine Stalling Issue
  224. Mercury Racing Motor Mounts
  225. 525 sc what lifters to use non roller
  226. Words to the wise from the not so wise regarding ignition pickup module or icm...
  227. Best Gen. For a 496 Stroker Gen 4 or Gen 6
  228. 7.4 mpi 2000 model had gaskets replaced the price good???
  229. Need Part Numbers for Gen V/VI 454 flywheel - cast crank versus forged
  230. 385HP 454 Rod knock
  231. 496 stroker jetting questions
  232. NMEA 2000 actuators?
  233. Figured out rpm surge but need some advice
  234. Can someone please tell me what boat this is?
  235. what is this amplifier/rectifier looking thing?
  236. 525efi 600sci and 700sci Heads... are they all the same???
  237. Snap on timing gun on 502 mag??
  238. Fuel pump fitting size 525sc
  239. 454 to 502 engine swap reused TB5 from 454 and im having ignition problems...i think
  240. problem with dual ram tab
  241. Merc 525 header bolt torque??
  242. BBC 540 performance upgrade ?'s
  243. Gaffrig Tachs/Smartcraft acting up
  244. Mechanical fuel pump on a fuel injected 454ci?
  245. ecm relocation
  246. 496 Oil Cooler, where to buy!
  247. Whipple VS Procharger
  248. Is GM Vortec 454 essentially the same thing as the 300-HP L29 7.4L?
  249. I.T.S. and imco stand off boxs question
  250. optima batterys
  251. How easy to go dual hydraulic steering from single?
  252. Bimini top suggestions
  253. Mercury 800 SC's has no boost,Why?
  254. Through hull water pickup help
  255. AFR 290 VS DART Pro 1 head
  256. Ridiculous marine pricing on IAC valve
  257. Stock valve covers with AFR heads and full roller rockers
  258. Mr Gadgets, Dick tryce
  259. Reistering boat with USCG (In Illinois)
  260. leaking imco risers
  261. what should the sea water pump pressure sensor read on a 496
  262. Gen VI oil pressure reliefs/bypass
  263. Exhaust leak
  264. tailpipe wall thickness?
  265. Wet Exhaust/Steam
  266. 502 mag dumping fuel out exhaust..
  267. Towing 11,500 LB Donzi FL to MI - Tips
  268. 502 MPI engine stalling
  269. Bravo XR Trim Indicator Help Needed
  270. buttons for the out drive trim
  271. 496 fault codes help
  272. Corsa captains call power question
  273. 496 mag, double beep alarm every 60 seconds. Code 37 sea pump pressure low.
  274. Drive showers
  275. Want to put in a electric fuel pump..have questions..
  276. steering ram leaking
  277. 300vx flush kit
  278. header fitment
  279. Water leaking from exhaust y-pipe coupler?
  280. What not to do with exhaust.
  281. Need help! Raw sea water pump
  282. presssure testing exhaust ?
  283. sealer for cockpit floor ?
  284. Correct values map sensor 496 ho ?
  285. Mercruiser 496 MPI running borderline hot....
  286. Exhaust manifold and risers ok? 454 MAG MPI's
  287. Water pressure gage input
  288. 1999 502 Mag Stumble and Back Fire After Long Run Time
  289. SAT Radio Antenna Wire Question
  290. Chris Craft Cooling
  291. Repairing Gimbal Rings
  292. exhaust temperature on 525
  293. circulating pump
  294. Saltwater Flushing
  295. Procharging 454mags ??
  296. Alternatives to Procharger intercooler
  297. Boat not sitting on all trailer bunks?
  298. Old School 425 hp Coupler Question
  299. 350 Mag cooling issues HELP
  300. What fluid for trim?
  301. Please help with spark plug question on 572's
  302. Would like some input from the pro's on Carb jetting for 489 with AFR's
  303. Wiring diagram for starter lugs and slave solenoid?
  304. 350 SBC Carb Size questions
  305. 496 HO intermittently not starting back up after running it.
  306. 502EFI excessive advance
  307. Coolant temp sensor question?
  308. 496 ho bottem end strength
  309. How can you tell the diff in a bravo and an XR bravo ?
  310. IMCO Hydraulic Steering Bushings
  311. 454 carb thunderbolt IV... timing all over??
  312. 454 7.4 mpi sea pump picture what do you think???
  313. Northstar muffler rebuild kits
  314. new baja owner, blown motor , need advice please.
  315. CMI E-Top Install on 496 Mag
  316. Cuting off problem
  317. MSD ready to run distributrs? good or bad???
  318. 496 w/Whipple rebuild specs & clearances
  319. 525 help
  320. Planning to repower my 292 Fastech
  321. 454 mag mpi inboard stalling when put in neutral intermittently
  322. Stainless Marine Exh Manifolds, will they work with 700 hp engine build?
  323. Water pressure at idle?
  324. Cavitation & Overheating - Possibly related ?
  325. K Plane Parts
  326. 454 7.4 mpi l VI sea pump back flush question and help please
  327. 502 mag lack of power
  328. 525's Running Hot
  329. Has anyone seen Jerry Haney lately? Having trouble getting ahold of him.
  330. 525efi high idle after wot blasts
  331. Carb help
  332. Boat leans to port side when running..
  333. Gauges pegged?
  334. Broken sterndrive continuity screw.
  335. Strainers Leak - How to fix? (how to seal)
  336. New Add-on hydraulic steering issue
  337. Carb and 250 Blower VS Fuel Injection and Procharger
  338. merc raw water pump, 350 v8 engine driven. Water head height?
  339. 454 mpi merc oil cleaner when doing oil change??
  340. CMI E-Tops
  341. Kenwood Wired Remote Installation
  342. Need help figuring out intermittent starter issue after engine swap
  343. Possibly Selling The Boat ???'s
  344. Raptor performance & replacement engines
  345. 454 base timing
  346. Question on books for SBC marine builds
  347. Engine harness complete??
  348. Exhaust / cam question
  349. Tach flickering key on not running.... 454 carb
  350. Another Help on Cam Choice Thread
  351. Hotspots on engine
  352. Running hot vs cold plug under boost?
  353. Basset Header ?
  354. HELP! Questions on which Thermostat housing to use with EMI exhaust?
  355. Steering Issue on Checkmate 253
  356. What boat is this?
  357. ZZ502 few questions???
  358. KE 2 piece valve covers LEAK!
  359. imco powerflow exhaust revrsion
  360. Loose steering on a Formula
  361. Bent/broke push rod or broken valve spring or??? also carb issue stock 454
  362. Engine bogging after jumping waves
  363. need pro carb setting info
  364. 496 ho IAC problems what now?
  365. Who's running fuel press regulators with carbs?
  366. potential dangerous issue / fuel tank snding unit
  367. Oil and Water leaking on 496 MAG?
  368. 496HO missing at high RPM
  369. timing chain?
  370. What would cause my hydro lock???
  371. Solid roller lash check
  372. sea water pump hose connection
  373. Changing Supercharger Oil
  374. 2005 496HO MAX 4000 RPMs
  375. Adding a fuel press regulator
  376. Water Pressure/525 EFI with a Whipple
  377. Want to add an Hour Meter
  378. Marine Upholstery
  379. HP500 Small Gear Reduction Starters
  380. 1991 eliminator daytona fells like i am draging something at low speeds
  381. Wierd ignition issue....454 Thunderbolt IV
  382. 1995 502 will not go above 1800 rpms
  383. Power steering Hose thread dimensions
  384. Prop blowing out!
  385. fountain 10 meter oil temp please help
  386. Suction From Fuel Water Separating Filter
  387. New XR drives lower water pickups plugged with paint?
  388. Kill laynard....
  389. replaced engine now Alternator wont charge
  390. Any tips on removeing water from oil?
  391. Bravo XR props haft
  392. Fuel Rail?
  393. Gimbal bearing driver Alpha 1
  394. IAC for Whipple 2.3
  395. comparison, Eliminator vs Bryant
  396. Pistons.......... Not even JE can help.
  397. What is this hose that broke off my Bravo 1 gimbal? (pic)
  398. prop / engine question
  399. Elec and mechanical fuel pumps
  400. Stock Weber Carb changes for Engine upgrades ?
  401. ME3 alarm sensors broken
  402. Exhaust riser gasket
  403. Boat performance changes?!
  404. 496 ho with boost? reliable?
  405. Difference in HP500 Ignition Modules by year...???
  406. Muffler Recommendations
  407. ProCharged 502 Checkmate Prop
  408. Add on hydraulic steering issue
  409. no spark
  410. Oil Pick Up Part # for 454 gen IV mag (have the melling oil pump already) Thx
  411. Whats the deal who is who..?
  412. nos on a boat?
  413. Canton offshore pan, what's the bracket for?
  414. k planes and hyd. steering
  415. help with deciding on a new boat
  416. Thinking of making the bulkhead between the cockpit and the engines removable....
  417. transom u bolts
  418. Better to make more power from 3K - 5K, or 4K - 5500?
  419. Engine harness adapter 10-14pin
  420. Starter bolt holes
  421. I need some prop advice after doubleing horse power.
  422. Part identification
  423. 496 won't start
  424. Top mounting starter for a bravo one?
  425. 502 MAG MPI lacking power
  426. Transducer question
  427. Formula 302 LS Repower Questions
  428. B&m 250 efi mercruiser supercharger no power/limp mode?
  429. What sealing procedure to use for ARP head studs in water jackets?
  430. Starter solenoid
  431. Bad Lifter?
  432. livorsi gps speedo ?
  433. 496 ho sea pump
  434. Fuel pressure sensors
  435. Dry exhaust
  436. Torque spec for Gen VI oil filter adapter?
  437. Merc trim Tab Ram removal.
  438. hydraulic lines
  439. High oil temperature ?
  440. Who has red underwater LEDs and / or red LED interior lights?
  441. Water temp issue (help)
  442. Valvetrain noise in new engines
  443. How to tell what cam and lifters are in my 502
  444. starter bolt torque
  445. Cool Fuel consumption ap for Mercury engines
  446. New engine disaster need engine guru help!
  447. XR DWP vs LWP
  448. Looking for advice on 454 or 502
  449. motor knocking after tune up
  450. Remove baffles fromthru hull
  451. OK...i got shocked by my throttles today.....HELP!!
  452. Adding Silent Choice
  453. SS Bow Protector
  454. 454 mag mpi blew out spark plug and now has top end taping!!
  455. mercruiser engine alarm buzzer
  456. Need Help, Electrical mystery.
  457. Blower carbs???
  458. carb jeting question
  459. 502 Dies
  460. Octane questions
  461. Mercruiser 496 plug wires???
  462. Quick 383 build question
  463. Anybody tried to drill and tap brass inserts?
  464. TRS Anodes
  465. 2000 Formula Fastech Blows shore GFI when main boat AC breaker is flipped on - HELP!
  466. Question on Bravo lower
  467. Anyone have a pic of a merc throttle cable converted to a work on a Holley carb?
  468. Aluminum 496 manifolds - bolt hardware
  469. Best prop for carrying loads?
  470. Remote power steering reservoir pump cap for old style pump?
  471. Engine Help
  472. trying to understand what exhaust is needed and why
  473. Tach jumps all over
  474. CNY Repair Shops??
  475. We need a after market performance engine section.
  476. 0 oil pressure
  477. Water Pressure/Volume Problem.. .Help
  478. Good cleaner and protector ?
  479. DId I do something wrong?
  480. GAffrig gauge senders?
  481. looking for a 502 mag. short block or long block
  482. Bravo One Lower Unit question
  483. Best top mount starter
  484. No Power to dash or engine
  485. Boat dies when put into gear... Need help!
  486. Air /fuel ratio in super charged 540
  487. WTF is wrong that I cant post
  488. What's up with DONZIDICECT.COM??
  489. Boat engine hatch stitching coming apart
  490. 1999 502 Mag Runs at 100* Need some help...
  491. new blower motor shuts off after being run at speed
  492. Corsa Switchable opeation
  493. Volvo Dual Prop Alignment
  494. hydraulic engine hatch lift cylinder question
  495. gen VI oil filter sandwich adapter
  496. Anyone ever had a crack or weap hole in a new set of World iron heads?
  497. Water in #7? and milky oil. Need Ideas
  498. edelbrock victor jr heads leaking water
  499. Rollmaster gen 6 timing set no fit??
  500. DIACOM Marine question