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I had the boat out on the lake today and everything was run
i had the boat out on the lake today and everything was run good, all the way from a smooth idle to full throttle and back. After about an hour and a half of cruising around 30mph i throttle back into… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
The original boat came whit A 4.3L MerCrusier 6 cyl Engine
The original boat came whit A 4.3L MerCrusier 6 cyl Engine and is being replaced with a MerCruiser 357 Alpha 4V 275HP Engine 5.7 5.7l 350 mag magnum ,now boat did not make any difference in speed afte… read more
Charles
Charles
Certified Mercury Tech
5,474 satisfied customers
James, I had my boat repowered last year (OMC Cobra 350).
James, I had my boat repowered last year (OMC Cobra 350). I also had the lower section of the outdrive replaced with a new one. The boat engine runs fine (~3800 RPM at full throttle). The boat only go… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
My 2003 mercruiser 5.0 alpha today went into guardian mode...and
My 2003 mercruiser 5.0 alpha today went into guardian mode...and would not run above 3000 rpm. I checked the usual sensors and found the oil, water temp and lower unit oil were fine. However, near the… read more
Charles
Charles
Certified Mercury Tech
5,474 satisfied customers
I have a 1999 5.0L Mercruiser Alpha drive. At wide open throttle
I have a 1999 5.0L Mercruiser Alpha drive. At wide open throttle I have noticed intermittent drops in RPM on the tach accompanied by engine cutout. When engine speed is reduced by 200 RPM this intermi… read more
Joe
Joe
Owner Kingsland Auto & Marine Services
Vocational, Technical or Trade Scho
1,392 satisfied customers
I have a clunking sound when I put the gear into forward but
I have a clunking sound when I put the drive gears into forward but not reverse. it seems not to catch and when it does it is at a higher rev than preferred the leg is a Mercury Transom with a MerCrui… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
i have a 2004 Chaparral 220 SSi mercruiser 5.0 Alpha one. Cant
i have a 2004 Chaparral 220 SSi mercruiser 5.0 Alpha one. Can't it past 35mph at top RPM with little extra weight on the boat. Last trip out was working fine at a top speed of about 46mph. Engine runs… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
have murcurser alpha 1 4.3L stern drine engine.RPM going crazy
have murcurser alpha 1 4.3L stern drine engine.RPM going crazy .up and down.on startup it reads 3000- 4000 rpm, engine sounds fine,temp fine,prop fine???????… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
Will a 1-1.98 ratio alpha 1 (mercruiser) out drive work or
Will a 1-1.98 ratio alpha 1 (mercruiser) out drive work or handle a 454 330hp engine if throttle in is done progressively. If not what gears and prop should I use for a 23' sea ray weekender. The 1-1.… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
My 2002 Mercruiser 5.0 coupled to an Alpha One out drive was
My 2002 Mercruiser 5.0 coupled to an Alpha One out drive was running at 3000 RPM and began to surge. I think the RPN+M's fell and then cought up again. Initally the tach read 3000 for thie first 10 mi… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
So i have a 1993 Larson cabrio 270 with twin mercruiser 4.3
So i have a 1993 Larson cabrio 270 with twin mercruiser 4.3 I/Os Alpha drives, recently when i am docking or leaving the dock or at slow speeds when i am shifting from forwards/reverse to nuetral the … read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,804 satisfied customers
I have a 220 hp 4.3l mercruiser 2005 with alpa 1 leg. Engine
I have a 220 hp 4.3l mercruiser 2005 with alpa 1 leg. Engine sometimes cuts out when I put into gear. usually after running for a while. I also find restarting can be difficult after motor has been ru… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,804 satisfied customers
I have a Mercruiser 5.7L Alpha. The problem I have is when
I have a Mercruiser 5.7L Alpha. The problem I have is when I first take the boat out and move the throttle up to around 3,000 rpm, the engine blogs down. The temp is normal, and this will last about a… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,556 satisfied customers
I own a MerCruiser 4.3L I/O Serial #OW637415 and I have lost
I own a MerCruiser 4.3L I/O Serial #OW637415 and I have lost the anode off of the end of the propeller. First, will it hurt anything if I use the boat for a weekend without the part? Second, I am tryi… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
mercruiser 4.2 liter vm diesel twin motors in 36 foot boat
mercruiser 4.2 liter vm diesel twin motors in 36 foot boat one motor will run just fine the first time you run to full throttle if you back out and then throttle back to full that motor will cut out u… read more
Yachtwork
Yachtwork
Owner Team Yachtwork
Technical or Trade School
1,048 satisfied customers
I have a 2003 25ft Mustang Sports Cruiser fitted with a 4.3
I have a 2003 25ft Mustang Sports Cruiser fitted with a 4.3 Mercruiser stern drive with 125 hours on it. Fuel consumption seems heavy at around 5 Gals/hr. Is this normal or do I have a problem.… read more
Scott Martin
Scott Martin
Service manager
Vocational, Technical or Trade Scho
167 satisfied customers
what is the dry weight of my 1991 searay 250 sundancer with
what is the dry weight of my 1991 searay 250 sundancer with twin mercruiser 4.3 v6's and alpha 1 outdrives?… read more
John White
John White
Marine Mechanic
Vocational, Technical or Trade Scho
306 satisfied customers
I have a 1999 Sea Ray. I took it out and when it got up to ...
I have a 1999 Sea Ray. I took it out and when it got up to 3000rpm( the point where the boat plains it died. Any suggestions on this?39648.8998562153… read more
Pappy's Sales and Service
Pappy's Sales and Service
Vocational, Technical or Trade Scho
586 satisfied customers
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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