View Full Version : General Q & A




  1. 496 Mag hesitation issues...
  2. Cigarette Draft
  3. 4500 vs 4150 on a 540
  4. gimbal bearing part number
  5. Scarab throttle/shifter?
  6. sea pump/fuel pump maintenance - how to?
  7. 900sc with Stainless Marine Gen III
  8. Alpha One Gimbal bearing seal question
  9. 454 Mag MPI Milkshake With Low Compression on 1 Cylinder
  10. Fuel pump question,
  11. Mercury racing 502 efi- head work- valve springs
  12. Mirage plus hub kit
  13. Marine (reputable) engine machine shop in the Southwest Indiana/Midwest area
  14. New gauges how to?
  15. Freshing up a pair of 420's gen4
  16. What ADD-ON hydraulic Steering is best to buy??
  17. Drive question
  18. New to boating. Looking at AT tantrum
  19. Best aluminum head?
  20. Steering turns lock to lock?
  21. What aluminum heads would be an upgrade from iron vortecs? Looking for more TQ and HP
  22. Intermittent 525 alarm at idle
  23. educate me
  24. No "fuel" issue & Mercruiser EFI 502 Info Needed
  25. sea water / fuel pump rebuild........help
  26. WHELP, time for a new motor/rebuild...Recommendations????
  27. Carburetor talk.
  28. Fountain Spitfire
  29. Pop Yachts to buy a boat? Whats the value in this?
  30. Internal Flappers
  31. 454 head
  32. 500HP Remote Oil Filter Adapter Leak
  33. 502 efi gen V running rich
  34. Stroking gen V's
  35. 502 Procharger fuel system setup problem
  36. Which header for my set up
  37. Oil temp question
  38. New Mercury 600 starting problems when hot
  39. Gev IV 454, modern fuel and timing
  40. Map sensor
  41. Question for the carburetor guys?
  42. Helping a friend - '97 Merc 5.7L LX Alpha - dead miss
  43. Question for those that have changed plugs on 496 MAG or MAG HO
  44. oil cooler flow direction
  45. 575SCI's, Thermostats and high temp alarm.
  46. 2000 502 mag mpi high oil temp????
  47. Engine Clearance Question.
  48. need advice on electric fuel pumps
  49. Crossover kit
  50. Engine stalls after returning to idle
  51. Got my engine idled down but now it is hard to start and has trouble staying running
  52. 496ho Losing Speed
  53. Oil pressure issue
  54. How to tell if transmission is going out
  55. Decipher beeps on Merc.
  56. Closed cooling for 800+hp
  57. Sea Water Pressure Sender Location?
  58. Hatch lens replacement help.
  59. Where are all the factory take outs??
  60. 502 MPI - Hot Boat Write Up
  61. What plugs to use on a aluminum head ?
  62. Boat floor repair or replace?
  63. Gill exhaust
  64. 502 Cast iron head and cam upgrade
  65. Speedmaster 2 outdrive will not mount back up
  66. MCM 5.7 Thunderbolt V.What Flywheel?
  67. (Carry On) A/C Options
  68. 2001 EFI 260 Mercs---- Thinking of procharging. Pros and Cons requested??
  69. 525EFI Steaming out exhaust after ITS install???
  70. 2000 Mercruiser 502 mag mpi engine scanner....where to get one?
  71. Best way to attach Merc cables to a Demon Carb
  72. Talon wouldn't fire yesterday at the ramp
  73. CMI E-Tops to Corsa Silent Choice
  74. Fountain won't plane out all of sudden
  75. T Bolt 5 plug and harness
  76. 2006 Indmar 383 with SPN 66017 code
  77. 05 496 HO cutting out
  78. HELP! 7.4 Merc dies all of no where!
  79. Baja 320 with a trim pump that just clicks
  80. How to install oxygen sensor bungs.
  81. Adding oxgen sensor to Gil riser
  82. 525sc height
  83. One side of crossover hot other cold. No Temp
  84. Pick up location with a notched transom?
  85. 500hp question carb to efi
  86. Help! Engine wont build rpm
  87. 350 magnum Engine head and cam upgrade
  88. Oil temperature issue
  89. BAHA 340 Mach 1 Combo
  90. gil tail pipe question
  91. Blown Bravo, need advice...
  92. AN fuel line question.
  93. pre alpha transom assembly will alpha 1 drive bolt up
  94. intake manifold heigh
  95. weiand 177 on 454
  96. my brothers 525 sc . get to 3500 and just spit and spatter
  97. Going freshen up 420's
  98. Cause of lifted ring lands on pro charger motor
  99. Cause of lifted ring lands on pro charger motor
  100. LT1 MEFI 2 question
  101. 500efi alternater
  102. Mercury 496 Mag trouble, need help
  103. Best place to buy AGI box?
  104. What happened to the beeper
  105. Twin aluminum Small Blocks good idea, or a bad idea?
  106. Hours reading wrong....Ideas???? please help
  107. Power steering issues after installing single add-on ram
  108. Shift cable Questions ?
  109. Mercury Engine Code
  110. Mercury 700' consumption &constant use in salt water
  111. Carrier bearing flange
  112. Scarab Thunder fiberglass swim platform??
  113. 500 EFI water jackets possibly plugged with mud.
  114. Alpha gen 1 vs gen 2 & TBIV vs TBV
  115. Need Advice On Blower Pullies & Belt Size
  116. Trim Tab Pump worn out?
  117. Steering options for bravo with HP Gimbal for 20' used boat
  118. 2nd Power steering pump smoking and leaking.
  119. water in chamber
  120. EFI Fuel Plumbing - Best Practices
  121. 454 mag mpi 385 hp Gen V 1992
  122. Trim tab pumps
  123. help finding a rebuilt mercury 500 EFI for a fountain
  124. my fountain is officially for sale complete minus hust the engines ..
  125. Oil coming out of hp500/525
  126. 496 HO 2 beeps per...
  127. 540 ci bb chevy blower timing
  128. Most boost/reliable hp anyones made with a block without extra center bolts on heads
  129. Mando Alternator question, on 502 MPI
  130. Engine Knocking 4000 RPM
  131. Need a compact alternator - 496 manifolds on 454 Mag
  132. 572 Blower Motor Knock Sensor / Misfire Problem
  133. 525 EFI Replacement Spark Plug Wires Needed
  134. Baja 442
  135. 225 mariner 3.0 carb'ed issues
  136. bad prop slip on baja 240 sport
  137. Best afr gauge and O2 sensor
  138. what hp am I pushing out of this 540
  139. Power Steering Pulley
  140. Fuel delivery issue, I think?
  141. 572 Quadrotor Running Rich HELP!
  142. Bravo XR upper driveshaft yoke NEEDED
  143. Belt/pulley squeal when starting - 496 HO
  144. Am I just hallucinating or being paranoid??
  145. 454 block replacement
  146. BBC MAIN and ROD WEAR QUESTION
  147. Need help with Dana billit trim tabs
  148. oil galley plugs
  149. 496, switched to thru prop exhaust, hard to start when warm
  150. 468 Merlin blocks and heads
  151. 800sc question
  152. Mounting a tank in a stepped hull?
  153. Engine has trouble idling down
  154. What vintage
  155. water in motor
  156. 2010 Verado 300's
  157. Help My Please ! 500 EFI Mercruiser Backfire !
  158. Imco Thumper Power Exaust ?
  159. 502 efi overheating.
  160. 454 Starters Driving Me Mad
  161. Bellhousing and coupler for 454 and bravo
  162. really could use your guys knowlwdge
  163. What is too low for water pressure?
  164. Merc 496HO High Exhaust Temp @ Idle
  165. Dropping RPM over 3K – almost like starving for fuel – opinions?
  166. Port manifolds&risers not getting enough water.
  167. Labor cost estimate alpha to bravo swap
  168. dyers superchargers
  169. How to identify motor with serial number.
  170. Engine developed "chirping" sound from stbd side exhaust
  171. Long row back
  172. MEFI 1 350 losing RPM
  173. Teflon Tape on EMI Exhaust Manifold Fittings?
  174. 496 Oil Cooler Upgrade Question
  175. Hatch Hinges
  176. Audible beeps
  177. Trim Tabs causing engine to stall, low voltage
  178. Water Pickup Location !!!
  179. Lost oil pressure AGAIN FN FREAKING OUT
  180. Help identify this boat please !!
  181. Steering Issues....
  182. Help me understand this?
  183. Volvo prop ?
  184. Anyone add hydraulic bleeder tees?
  185. 33 outlaw, 4 Batteries, 2 switches 10 cables????
  186. Transom mount water pickup
  187. Looking at a 383 crate
  188. Repowering..
  189. Water pressure Line question
  190. Need Expert Mechanic on Mercruiser 496HO Fuel Injection System
  191. 1990,s 800sc motor?
  192. Can I run a 496 PS pump dry as an idler?
  193. Yearly Alternator Dying
  194. Thunderbolt IV V-6 Module
  195. Wide band O 2 a sensor placement
  196. Water Flow Issue
  197. Timing procedure for Volvo Penta 5.7 GS
  198. Trim Tabs Flat Or angled ???
  199. Repower
  200. When to rebuild/re-fresh Blown 540s?
  201. Holley 4150 tuning
  202. Does this motor look rebuilt
  203. Parker fuel valve solenoid replacement/substitute
  204. food for thought, fresh water cooling
  205. extra idler to get more belt wrap on procharger drive belt?
  206. Need press in hub for mirage prop
  207. spark plugs for Dart 1-014-2 heads
  208. Mercruiser 502 magnum efi/mp gen VI
  209. Hello from New Hampshire
  210. Mercury Smartcraft alarm going off
  211. 502 running rich on one side
  212. Oil change interval for 525?
  213. IMCO extended drive shaft
  214. Anyone know where the new shop will be?
  215. Working on a boat deal, but have some technical exhaust upgrade questions
  216. Big Block Actual Dimensions
  217. Mechanical fuel pump
  218. Need help, no oil to rockers on 5.7 sbc - long description!!!! sorry!
  219. 502 carb 550hp - Blower vs NA
  220. 91-2013 fountain 29 help
  221. Boy my top gun. Certainly ain't my little rocket ship
  222. Any problems unhooking speedometer hose from B1
  223. ok who got some info on scorpian motors out of livornia mi
  224. Fuel Consumption -- a justification
  225. HP500 Valve Covers Won't Fit W/Stud Girdles
  226. n/a piston to wall clearance.
  227. Possible oil pump gears binding with a Melling 10778? Has is happened to other?
  228. Bravo XR trim leak, help..
  229. Bravo 1 steering actuator
  230. Does an OMC King Cobra setup have any value?
  231. dominator tuning
  232. Burning smell at high RPMs?
  233. HP500 Built to 540
  234. Bravo 1 steering problems
  235. Bravo 1 steering locked up
  236. Another oil pressure issue
  237. exhaust leak need gaskets
  238. Hardin Marine
  239. Anyone ever heard of or tried making vent tubes for a bravo drive like #6's
  240. Random alarm at speed
  241. 350 MPI issue and possible options
  242. Cleaner/wax ect best stuff is???
  243. 502 vst problem
  244. corsa captains call solenoid?
  245. 240 baja undriveable at speed
  246. Rotors
  247. ended up buying cig top gun . so im thinking selling my hull no motors or drives
  248. Water in drive, oil in bilge.
  249. Bravo 1 s/n identification help please
  250. Help Please - re-jet 454 merc carb
  251. Toasted the bearings. Anyone Know why?
  252. Traverse city, Mi - POKER RUN "need ride"
  253. Power trim pump was running under water, replace motor or complete unit??
  254. Baja water in fuel??? Help.
  255. Crane Gold poly lock failure
  256. Need help getting on plane
  257. Bds blower, what should I torque the bolts to?
  258. Gauge upgrade help
  259. Wiring Harness
  260. What size lifter gallery screens to use
  261. Can I use Power Steering fluid for Trim Tabs
  262. please explain the basics of hydraulic trim tabs to a newbie
  263. oil pressure sender - suitable location?
  264. stainless marine exhaust
  265. Raylar 496 IAC valve.
  266. How many engine builders like to use zero gap rings?
  267. 900sc What jet sizes are stock for the carburetors
  268. motor not making the power it should be
  269. 525 SC Good, Bad, and The Ugly Truth???
  270. 7.4mpi with cmi headers which gaskets
  271. Merc smartcraft showing engine malfunction
  272. Carb question. Is this suppossed to be open?
  273. Going to dyno my Procharger head unit, any guesses on how much hp it takes?
  274. 30' cat single hp500 WOT 3500 no more? Need help
  275. Fountain boats Weight increase from 2006 to 2007
  276. Engine flooding
  277. Water Pressure Line
  278. MSD ready to run limiters issues??? anyone?
  279. Milky blowby from valve covers
  280. 496ho misfire and intermittently stalls when starting up
  281. Wideband location ...
  282. Mystery motor please help identify bbc
  283. Water pressure Mercury Racing 525 EFI
  284. MerCruiser Gil exhaust manifolds What motors did these come on?
  285. Harness
  286. Add on hydraulic steering only turning right?
  287. Small block EFI build
  288. Tube pulling duty - best to prop down?
  289. Daytona Sensors question
  290. Which is better Sarasota or marathon races?
  291. 632 CI 815 hp.... 12,000.00?? come on....
  292. Intense marine
  293. Exhaust Question
  294. 6.2 rebuild
  295. Imploded Scarab 29 - Lake Conroe Texas
  296. 377 oil pump
  297. IMCO -3 shorty - water pick up slot
  298. Pilot Buhing
  299. Stalling 502 mag mpi
  300. Why no intank fuel pumps?
  301. Just Confirming - Cometic Head Gasket Reusable??
  302. looking for a 502 crankshaft
  303. 07 38 Top Gun new power, need props?
  304. Help finding Part # for rear main seal SLEEVE for GEN 6 502
  305. Power steering quits working at high trim?
  306. 1979 thunder craft shift problem
  307. Mercury trim pump wiring (diagram), is this right?
  308. Mercruiser 5.7 engine swap, flywheel/coupler question.
  309. Turbos and centrifugals
  310. 7.4 L mercruiser 4 barrel won't kick in
  311. Trim tabs indicator cable lengths..
  312. hi perf merc efi; ever used in a motor vehicle? OEM?
  313. Q-Jet to Hollry Carb Swap Question.
  314. Are fuel pump pushrods supposed to rotate?
  315. Merc theromostat housing gasket ?
  316. mercrury 1075's oil pressure
  317. Huber 925 info request??
  318. 1075sci
  319. Marine Fuel in Southern Michigan - Jones Michigan
  320. For sale
  321. breaking up after 75 % throttle
  322. Exhaust Bolt holes blind?
  323. Installing external hydraulic steering questions
  324. Anyone on here have a 30' cobra terminator cat
  325. Morel vs Johnson lifters. Info needed
  326. 454 has major stumble/flat spot at 3/4 throttle but runs great at WOT - diagnosis?
  327. Operating Temps n/a 540's
  328. Who make the hatch actuator for Advantage in 06
  329. Engine break in oil change
  330. Help with Flywheel or Ring Gear decision
  331. HELP! New 8.2L with CATs has sand in air valves?
  332. 5.0MPI motor pull and oil pan
  333. A/f 540ci n/a
  334. Fuel pressure @ wot
  335. Afr meters
  336. Holley/Edelbrock/Clay Smith 6-valve rebuild kits still available?
  337. Engine Stumbles with Tach Jumping......
  338. Yay ... Fun with wires
  339. Which torque wrench do you use?
  340. Sputtering at WOT
  341. Stupid question: What's the stock Mercruiser 7.4L throttle cable bracket look like?
  342. Depth Sounder and GPS
  343. Help with 502 Mag
  344. Anodized cleaner for painted aluminum
  345. Help with a newly rebuilt HP 500
  346. Engine torque specs 575sci
  347. 525 EFI Oil Pump Drive Sensor
  348. Quick Rinda mercruiser question 555 adaptor
  349. wiring diagram
  350. slight miss when i hit the Trim ?
  351. 2004 496. Differences ?
  352. Fresh Water Flush Kit - operation
  353. Mercruiser 5.0 EFI - Not firing.
  354. Alpha drive tear down and install problem
  355. Power In Power Out
  356. Depth sounder problems
  357. Raw water pump issue 496HO
  358. Dry - To - Tip Thru Transom Exhaust Help
  359. Safe RPM for Merc 420hp
  360. Using my 454 mpi intake on a bored 502
  361. Merc 496 HO / Bravo 1 steering issues
  362. E-Z Tow Trailers.
  363. feedback
  364. Merc Fuel filter, part numbers
  365. Remote start and alarms for boats
  366. Rev limit problem 8,1 inboard Mercruiser (496 Mag)
  367. 496 ho iac not responding
  368. Yamaha base timing mode???
  369. External flap
  370. Bravo One Tie Bar issue
  371. 97 Baja Boss Hammer
  372. Throttle Adjustment - how difficult
  373. What all is different between the 502MPI's "97" and "98" ???????????
  374. Question on new A/C units Dometic vs Webasco vs Mermaid
  375. Emi exhaust still reverting
  376. 7.4 motor runs then it don't
  377. bravo 1 to Bravo xr price difference
  378. How to tell the difference ?
  379. Bravo dual water pick ups
  380. CMI header overheating
  381. Best Spark Plug To Use
  382. Mercruiser 5.7 EFI - knock or ping under heavy load
  383. 575sci what hyd rollercam to use
  384. Do I need water pressure gauges?
  385. well its official fourhoaresman did my tranny in
  386. Hesitation / Bog under acceleration
  387. 454 MAG vs 502 Mag fuel curves
  388. Thunderbolt IV question/ issue
  389. Water Pressure Gauges
  390. 6.2 mpi intermittent stall
  391. k&n oil filter on billet aluminum mount.Almost impossible to get off. Anyone else.
  392. Extension box - external steering
  393. 500 Bulldogs
  394. only one company that makes headers ??
  395. Looking for a good 350 Vortec setup.
  396. quickfuel carbs
  397. shift cable adjustment tool/ plate for a OMC Cobra (1986) drawing or CAD file?
  398. Triple 500 HPs to twin 575 SCIs
  399. Question about B1 transom assemblies
  400. What cam button???
  401. Exhaust port deposits
  402. Walmart oil prices.....
  403. mpi running rich at idle
  404. Freeze plus Chevy
  405. 500efi intake gasket
  406. What Temp Sender is This?
  407. Older 110s kplane
  408. Mercury 1100 Valve Lash
  409. T-stat housing plunbing
  410. 489 Temp weird temp issue
  411. What Engine Oil for Superchaged Engine?
  412. Installing thru hull tips
  413. Questions about big power
  414. 548 or 572 BBC N/A Build Assitance/Advise
  415. Alternative to Rubber Exhaust Flappers??
  416. Deutsch or Weatherpack or Metripack?
  417. Water pressure too high?
  418. Sierra vs. Mercury / Quicksilver
  419. Gen V marine 502
  420. catamaran planning issues. 30' Chris craft
  421. Replacement 5.7 350 engine
  422. Holley EFI/DIS Conversion
  423. 2003 fountain 29 cabin door gas assist cylinder for top flip up door
  424. 500efi head gasket
  425. 496 ho drive coupler question
  426. Speedo hook up?
  427. Tachs not getting signal from smartcraft
  428. Engine swap question
  429. 454 blower update.
  430. Help - Merc 454 can only get to 3900 rpm wot
  431. weird distributor problems...
  432. 454 Mag MPI: Strange cold idle….almost sounds like a 330hp for a few minutes
  433. Wiring question on an engine swap
  434. Thermostat Questions - Notched Gasket?
  435. HaxbySpeed
  436. after market exhaust 350 mag mpi
  437. Need Someone Smarter Than Me
  438. Thru hull exhaust question
  439. What's the purpose of the shift bracket?
  440. 496 Position Sensors (Cam & Crank) Question
  441. oil pan related question
  442. installing transom assembly
  443. Questions on Engine Modification xm270hr cam
  444. B/W Tranny dipstick plug help
  445. well do i have the start of a trans prob
  446. Dry sump tanks
  447. What type are these switchable exhaust tips?
  448. Marine Machine steering cylinder seals
  449. 500 efi ECM and harness question
  450. Trim pump not sounding very good, Bravo 1 drive
  451. Tach acting strange??
  452. Thru Through Hull Transom Low Raw Water Engine Intercooler Pickup Grooves Channels
  453. how to convert to dry exhaust???
  454. Looking for performance increase in 454 magnum EFI and prop advice.
  455. Loose steering
  456. How much to fill antifreeze container in a 525?
  457. 496 HO Burning Pistons
  458. Flame Arrestor / Filter Elements
  459. Another fuel system setup question - fuel / water filter before or after mech pump?
  460. Let the guessing game begin as what broke in 502 mag EFI
  461. 3" vs. 4" thru hull exhaust
  462. Bilge Pump Question
  463. 98 502mag mpi surging
  464. cover bled hint of color onto white vinyl how to get out
  465. HP500 oil filter mount question
  466. Anyone used ggb inserts in dry tails.
  467. Cam intensity question
  468. 525efi Tach reading high
  469. How to get a little heat with crossovers...?
  470. Boat with shorties question
  471. Who has had issues with afr heads??
  472. Running two different styles of pickups on Bravo drives
  473. Fast ez-efi, holley terminator ?????
  474. Cobalt 342 motor troubles
  475. 525 EFI alarm 2800rpms
  476. How do I set timing with no marks on crank?
  477. 525 efi power loss
  478. Setting X dimension
  479. 525 EFI Too Much Water Pressure
  480. 7.4 lx efi falls on its face and hesitates
  481. Windshield Wiper wrist bayonet connector?
  482. 4 blade prop question
  483. 502 mag mpi?
  484. chicken or the egg, ECm or guage
  485. One for the gear heads.... or maybe a stupid question...
  486. Timing a delco voyager distributor
  487. adjusting valves with intake manifold installed?
  488. Both trim tab switches and drive trim switches not working
  489. Motor does not run right at low RPM
  490. Rudder Spacing From the Hull ??
  491. Flushing with thermostats (with holes drilled)
  492. K Plane hydraulic fitting available lengths? Part numbers? suppliers?
  493. 96' 502 mpi, low fuel pressure
  494. Stupid mistake - have I done any damage
  495. Testing an ignition module
  496. looking for drive shaft housing & bearings
  497. Water pressure question, Before I put it back together?
  498. Rochester question
  499. 525 EFI refresh lifter issue!!!
  500. Carburetor to EFI conversions