black max 150 trouble - Page 4

phester · #31 08-25-2005, 12:52 AM

good luck willy

reelapeelin · #32 08-25-2005, 08:16 AM

Yeah, Willy...if it's water in the tank, no use payin' a tech to clear that up...dependin' on HOW MUCH water, the H2o BUSTER (Starbrite, OMC and others make it) is mostly isopropyl alcohol and will negate the water's bad effects on the motor...on the other ahd, if there's too much water, you'll have to get most out, then add the treatment...MOST importantly, find out hoe it got inthere to begin with and correct that... ;) :P...

Blue_Runner · #33 08-25-2005, 03:19 PM

Willy,

I'm surprised I haven't heard anybody mention this but, have you checked the spark plugs?

My Yamaha 150 was fouling spark plugs right before I repowered with a new motor. Sounds awful similar to your problem. If you take the plugs out you should be able to tell which ones are causing the problem.

Another thing, once a plug was fouled, it would sometimes un-foul (if that's a word). In other words, I could go along just fine, then the plug would foul and I couldn't get over say 2500 RPMs. Then it would kick back in and run normal for a while. Sometimes more than one plug would foul and I couldn't even get to 2000 RPM. It was easy to tell what was happening cause after installing new plugs it ran great. Plus after pulling the plugs you could tell which ones were fouled.

Seems like a simple thing to check if you haven't already.

Good luck!

willy · #34 08-25-2005, 07:29 PM

THANKS BR BUT IT LOOKS LIKE I HAVE A DIFFRENT PROBLEM I CALLED THE MECHANIC TODAY, HE SAYS HAD MOTOR ON TEST EQUIPMENT GOOD SPARK ALL ELECTRONICS RIGHT ON THE MONEY. HAD MOTOR RUNNING IN SHOP AND RUNNING GREAT, COMPRESSION IS GOOD ALL SIX. HE STARTED CHECKING CARBS AND FUEL. SAID HE PULLED WATER SEPERATOR FILTER AND IT HAD A WHITISH GEL LIKE CRAP THAT HE THINKS COMES FROM SEA WATER IN THE TANK SOMEHOW. I TOLD HIM TO LEAVE IT ALONE AT THIS POINT SINCE IT IS NOT CARBS OR ELECTRONIC I'M GOING TO PICK IT UP TOMMOROW AND BRING A PORTABLE TANK AND SPLASH BOAT AND SEE IF PROBLEM GOES AWAY. IF I AM GETTING SEA WATER IN TANK THRU VENT WHICH IS THE ONLY PLACE I REALLY CAN BE ON MY BOAT HOW DO I EMPTY THE 25 GALLONS I GOT IN THERE AND FLUSH OR CLEAN THAT TANK ??? ??? ??? I'VE NEVER DONE ANYTHING LIKE THAT BEFORE TECH SAYS CARBS ARE RUNNING GREAT DON'T NEED TO BE REBUILT HE SAID IF I CLEAN TANK AND LINES AND FILTERS ETC. TO PUT A PRODUCT HE HAS THERE FOR ME IN THE GAS AND IT WILL CLEAN THE CQARBS OF ANY OF THAT RESIDUE IF IT IS IN THERE

reelapeelin · #35 08-26-2005, 12:30 AM

Willy, you gotta remove the deck over your tank and remove the sending unit...that will leave an opening in the top of the tank you can work thru...just remember that IS gasoline you're smellin'...get RID of all in the tank...ain't gonna be fun or easy, but result will be SMOOTH runnin' V20...does your local dump have facility for used motor oil...if so, take small quantities at a time there to dump...PLEASE DON'T dump it on the ground or down a storm sewer... :P...good luck...it'll be several steps in the process of gettin' your tank cleaned out...don't POOF yourself!...

Bet your vent hose or maybe even the fill hose has opening somewhere...might as well replace both while open...don't forget to put back that GROUND WIRE from filler to tank...es mui importante!...

Skools Out · #36 08-26-2005, 01:14 AM

you can run gas line out the back of the boat down to the ground which would be lower than your tank and squeeze the primer bulb to get the gas flowing and let it drain on it's own. Then use compressed air and blow through the vent and that will force whats left out the pick up tube.

reelapeelin · #37 08-26-2005, 01:31 AM

Skool...how much compressed air can he use?...plus, I'm thinkin' w/the white stuff the tech mentioned, he may need access for cleanin'... ;)...

Skools Out · #38 08-26-2005, 01:48 AM

i've put 20 to 30 psi in my tanks and watch the crap fly out the line. If that crap is in the motor it's in the lines too. I'd change the fuel feed lines and the primer bulb. you know it's full of it too. Lacquer thinner will melt the crap in your tank as long as it's a metal tank. Then it will evaporate.

reelapeelin · #39 08-26-2005, 08:52 AM

Willy, ya gettin' all this?...it's good stuff... ;D...how many gallons you figure are in your tank that you gotta get out?... ???...

willy · #40 08-26-2005, 10:59 AM

Oh I'm getting it :o already planning to change lines from tank to motor, and buld, mechanic called again last night. he said he did a rebuild kit on the fuel pump and put new fuel line from pump to carbs. he also changed the fuel/water sep filter and ran a gas line to the filter from a seperate tank. He says it runs great compression has come back up since i did that chemical he gave me to spray into cylinders and got out deposits and fouling. Tell me about using thinner to clean the tank, first time anyone has mentioned that.