92 FastStrike 175 siezed up

M

mmassey1

Recruit
Joined
Aug 31, 2003
Messages
4
Strange thing happend on my motor. Was running full throtle and it just stopped. No sputtering no rattling--dead. It would turn over but wouldn't crank. An hour latter it cranked fine--ran it 15 minutes heat alarms sounds. I shut it down ASAP again no rattle no knocks no sputtering. RPM's did drop about 300 30 seconds before the alarm. It was siezed up this time. Do you think I will have to rebuild it? Should I buy a used motor or rebuild? It only has 900 hours. It seemed to be running fine til it stopped. Water pump was working I think. There was no heat alarm the first time it stopped.
 
T

The Marine Doctor

Commander
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Jul 25, 2003
Messages
2,177
Re: 92 FastStrike 175 siezed up

You have been subjected to a 4 point siezure. Its rebuild time.<br /><br />When starting the engine...have you been using the fast idle lever?<br /><br />This is a NO NO...you should have been informed of this when you bought the boat.<br /><br />The engine should warm itself up..advances the timing for about 30-45 seconds.<br /><br />Here is what happens. When you start the engine heat is instantly created. The POPPET valve is put in place to keep cold water from reaching the cyl's before its warm (slows it down to grab some heat from the exhaust). If you raise the lever you create more pressure than the poppet valve is able to regulate..you then get cold water hitting the cyl's. The cyl's contract on the Piston...and over time the engine finally fails. :( <br /><br />OBJ might be around later to confirm what I have said...He is one of the top OMC's here.<br /><br />I have seen this happen many times with Loopers.<br /><br />TMD
 
M

mmassey1

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Re: 92 FastStrike 175 siezed up

I haven't been using the lever but lots of people use the boat. I have really hated this motor as I have changed one piston already because filings were in the engine. OMC dealer said it probably came from the factory that way but it was outside the one year warranty. I change the power pack twice. I think I will just look for a merc or a yamaha used and rebuild it if I have to. :eek:
 
C

Cricket Too

Lieutenant Commander
Joined
May 14, 2003
Messages
1,732
Re: 92 FastStrike 175 siezed up

Marine Doctor.....Does what you said about starting with the fast idle lever apply to all motors? I have never heard it before but it makes sense. But my motor won't start without using the fast idle lever. Is there a way to start a motor without using it? Thanks.
 
OBJ

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: 92 FastStrike 175 siezed up

Hi double MM....A "grand maul seizure" is not the best thing in the world to experience.<br /><br />In reading your post, I can see several issues that need addressed. I do agree with TMD on the "non-use" of the throttle when cold starting. And I wouldn't let anyone use my rig unless they know how to use it. But that's a personal issue.<br /><br />You posted that you had one piston replaced due to "shavings" in the engine and the engine was out of warranty. I have worked with the OMC crew before on issues like this and they did come through on a number of occasions for the customer.<br /><br />When the engine was rebuilt the first time, were the carbs over hauled as well? Loopers are real finicky when it comes to carbs and running lean. By the way, how many cylinders are shot or do you know yet?<br /><br />Was your oil consumption steady? Which VRO pump does your engine have, the three wire or four wire? Are you sure the alarms for the VRO system were working?<br /><br />You kinda stated that you were not sure if the water pump was working or not. When was the last time it was replaced?<br /><br />And also, when was the engine in to the mech for a good tune up? 900hrs is a long time. Somekind of preventive maint. needs done during that time.<br /><br />What I'm fishing for is a cause for your problem and something to help prevent it from occuring again. Sorry for being long winded.<br /><br />Keep us posted MM....thanks.
 
D

DJ

Guest
Re: 92 FastStrike 175 siezed up

When I bought my Suzuki 140, the dealer warned against using the warm up lever. He was concerned about "cold sieze".
 
T

The Marine Doctor

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Jul 25, 2003
Messages
2,177
Re: 92 FastStrike 175 siezed up

mmcpeck<br /><br />The owners of the v4 loopers are the ones that have to worry...I believe they started production in the mid 80's<br /><br />TMD
 
C

Cricket Too

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Joined
May 14, 2003
Messages
1,732
Re: 92 FastStrike 175 siezed up

Marine Doctor......Thanks, I have never heard that before, it's good to know for the future. Right now I don't have to worry about I guess since I have a '75 70hp and also '99 200hp. Thanks for the info.
 
E

envy83

Seaman
Joined
Aug 12, 2003
Messages
68
Re: 92 FastStrike 175 siezed up

I did the same thing to a johnson 88hp, and now that its mentioned I always used the fast-idle lever. **** , that was a $1200 mistake.
 
S

seahorse5

Rear Admiral
Joined
Jan 24, 2002
Messages
4,698
Re: 92 FastStrike 175 siezed up

There is no poppet valve in the Faststrike engine. The thermostats are spring loaded to move off their seats when the throttle is opened up and the water pressure increases. The thermostats are vented to help get water up to the cylinders as soon as possible. The cooling water is first warmed by the exhaust before it enters the cylinders and heads. You want water around the cylinders right away to ease and equalize the initial temp increase while it is running.<br /><br />You have to inspect the motor to find out what causeed the sizure. It could be from stuck rings, overheating, internal damage, or even a gearcase problem.<br /><br />Unless you race the motor at high speeds while cold, it will not sieze up with the throttle kept below 2000. The Faststrike series has an automatic fast warmup feature, so it is best not to open the throttle on a cold start.
 
M

marinegrh

Petty Officer 2nd Class
Joined
Sep 1, 2003
Messages
196
Re: 92 FastStrike 175 siezed up

I WOULD HAVE TO AGREE WITH SEAHORSE, AND THE STAT AND SPRING ISSUE, BUT HAVE SEEN EM FAIL DUE TO COLD SEIZURE AS WELL, STATS THAT ARE CLOGGED DONT LET WATER PAST AS WELL AS UNCLOGGED ONES RIGHT GUYS, ID BE CURIOUS TO HEAR THE OUTCOME OF CAUSE
 
M

mmassey1

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Aug 31, 2003
Messages
4
Re: 92 FastStrike 175 siezed up

I will know more by the end of the week. One thing--you guys are talking about a cold seizure. Do you mean a seizure on cranking while idling? Even though it was only 10 or 15 minutes after I cranked it--I was running about 5000 rpm when it stopped. Local dealer is picking the boat up at the boat shed and said it doesn't sound good. I wish the engine had shown some symptom. <br /><br />I used to really be an OMC man but this motor is a real pain. <br /><br />I will post outcome as soon as I know. Thanks fellows.
 
OBJ

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: 92 FastStrike 175 siezed up

Double MM....we're talking about racing the engine while it's still cold. The cylinders will heat up a lot quicker than the block. If the engine is equipped with cold start, always best to let it work.<br /><br />To envy83, the 88's were not equipped with the cold start system. You need to use the cold start lever but just enough to get it started and runing between 12 and 1500 rpm before dropping the lever.
 
M

mmassey1

Recruit
Joined
Aug 31, 2003
Messages
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Re: 92 FastStrike 175 siezed up

Water in the oil. Guess that is what I get for running in a tropical depression last week in South Louisiana.<br /><br />Hole burned in one piston, all cylinders scared. Two connecting rods shot. <br /><br />Total rebuild with new water pump, rebuild the carbs--$4300. Shop is very good--does a lot of work for commerical fishermen. The owner said he reccommends that everyone get rid of the auto oil on eary ninties OMC's and go back to mixing the oil with the gas.
 
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