Yamaha 1998 200 SW II Does not sound good.

[kavika]

Took engine in for overheat alarm. Have replaced impeller 2 times in last 2 years. Very strong pee. I have run Very low hours. Was running well. Less than 5 hours since last full service in Dec 05.

Yamaha Dealer Mechanic said "Does not sound good." May be con rod bearing?

New 250 4 stroke 14 K. New power head $4800.

How do I determine cost vs. point of no return?

Thanks!

 

[TomS]

Re: Yamaha 1998 200 SW II Does not sound good.

Why buy a new motor if you are only using it less than one hour a month?

-- Tom

 

[bernieb]

Re: Yamaha 1998 200 SW II Does not sound good.

Get a second opinion.

 

[rodbolt]

Re: Yamaha 1998 200 SW II Does not sound good.

look on the yamaha website, I think there is a dealership with a master tech near you. its really really rare to see an overheat damage a bearing.
and full service can mean anything from changed the plugs to actually followed the factory maint schedule.

 

[kavika]

Re: Yamaha 1998 200 SW II Does not sound good.

"there is a dealership with a master tech near you."

It is at a 5 Star Yamaha dealer now.

125 psi in all except # 6 which is 15 psi low.

Am going this afternoon to see mechanic (Not a Master, closest is in Tampa I am in St Pete) and he will point out the knocking sound. It could have been there from when I bought the boat 2 years ago....??

What do I know???

I am leaning towards the Yamaha power head ??

 

[rodbolt]

Re: Yamaha 1998 200 SW II Does not sound good.

as far as technical servoice goes 5 star is a 40 min video traing session.
do that and presto your 5 star
master tech requires a stay at a holiday inn express.
my pic is on the web site.

 

[kavika]

Re: Yamaha 1998 200 SW II Does not sound good.

"my pic is on the web site."

From Wanchese ?

I went down and listened to knock. With the cover off at idle you can hear a little. Rev it up and it goes away, maybe.

With cover on can not hear the sound.

Run till it blows, new power head $4800 or new 225 4 stroke for $14,200 for everything but using my harness, controls and SS prop????

Just payed for Nov Europe vacation, ugh.

 

[rodbolt]

Re: Yamaha 1998 200 SW II Does not sound good.

rather than run it till it blows try to find what is knocking.
if the water pump assy was not installed correctly the drive shaft will knock.
right now you most likly have a rebuildable powerhead.
normally if there is no crank or rod damage it takes 2500-3000 dollars for a total recondition.
if you cut some corners the price can drop quite a bit.
if its EFI then have a look at the O2 sensor draw tube, if plugged they sound exactly like a wristpin when they slap inside the holder. if one or both ends of the draw tube is shiny its been slapping.
then to get a rough check on what is loose, remove all plugs, rotate the motor till a piston comes up to TDC. use a long phillips screwdriver on the piston to find TDC.
then rotate the flywheel aabout 30 degrees father and hold it still. place the screwdriver on the piston and push.
if a wristpin or rod is loose you can feel it.
do that for all 6.
like I say its rare that overheating causes beaing damage. normally it causes piston damage.
if you attempt the repair yourself it gets even cheaper.
yep I am the fool from wanchese.
the hardest part of rebuilding a v6 yamaha,or any other motor, is finding a competent machist and cleaning everything.
if they look fine you can reuse all the bearings. I always replace the bottom crank bearing and the wristpin bearings any time I have one apart.
replace the rodbolts anytime they have been torqued.
send the injectors to flagship for service or rebuild the carbs, replace the lift pumps as that is one of the few items that can take out a crank or rod bearing.
carefully check all pistons and bores for being inside service limits.
last V4 crossflow jonnyrude I built set me back 900 in parts cause I had to buy a crank.
its still running on my 18ft hydrasports.

 

[kavika]

Re: Yamaha 1998 200 SW II Does not sound good.



RB thanks,

I am concerned that the dealer replaced the plugs *, impeller *, oil* in lower leg cleaned carbs to do diagnostics by listening to the "sound" to the toon of $400. Of course I gave the OK.

Again 125 psi on all 5, 110 on #6.

They did not do the "screw driver" test.

December 05 replaced by another Yard doing bottom... which is in poor condition per my bottom cleaner lasting only 7 months...
*Plugs - wrong kind
*Impeller - cheap aftermarket
*Oil - cheap


* Yard was recommended by good friend who is anal about his boat. I would not take my boat back to them!!!
They broke the wash board barrel bolts out by tilting motor with out lowering board, put parts in cup holder and never said anything. Manager was given parts by me... Never heard from them again. Did not connect the Speedo tube nor paint the engine skeg.

Temp alarm.. dealer thinks that the wiring to the engine oil sensor is wrong and wants to replace the sensor and connection wiring. It has been cut and connected with crimp connectors (not H2O proof). Do not understand how that would give a Hi Temp depower?

Now starts right up and sounds good to me with cover on...

Guess I will bring it home and get a second hands on opinion from Master Mechanic listed on Yamaha page, If they will travel this far.

Thanks again, have a great weekend...