Mercruiser help - Thames area

[maxum1900]

I would be grateful for any help - I have a 20 foot sports cuddy with a 4.2l Mercruiser and would appreciate the benefit of your collective experience to recommend a well established Mercruiser engine service specialist.

I had the exhaust risers replaced in 2010 and since then, although the engine runs smoothly without issues, I am concerned about the oil pressure levels. At idle straight from cold the oil pressure needle is the near the top of the gauge and on the few occasions (I use the boat on the Thames) I have increased the revs on the engine past 1500 the needle goes that little bit further, pretty much to the last marker on the gauge.

I have been told by my existing mechanic who has spent time investigating that it is nothing to worry about and may be down to a faulty oil pressure sensor / gauge. I am dubious because the needle is so consistent in its readings - moreover I am nervous to now take the boat downstream to the tidal thames in case of being left powerless with a blown engine.

Any thoughts and certainly recommendations on a respected Mercruiser service engineer certainly welcome! Thank you!

 

[rafiki_]

Sorry, no experience of this engine personally. Actually you might try the Thames Forum, they will have a better view of local service suppliers.

 

[Deefor]

What rafiki_ said .

Whereabouts on the Thames are you - marina, private mooring, bankside etc.?

 

[lovezoo]

I suggest you get your existing mechanic to either test the oil pressure with a mechanical gauge or replace the sender. I wouldn't use the boat until you have done this.

 

[paultallett]

Hi and welcome to the forum,

When I was on the Thames I used Blue Nine marine based at Val Wyatt's. Mercruiser main dealer and very thorough.... Give Eric a call and I'm sure he'll be able to help.

 

[Elessar]

I would be grateful for any help - I have a 20 foot sports cuddy with a 4.2l Mercruiser and would appreciate the benefit of your collective experience to recommend a well established Mercruiser engine service specialist.

I had the exhaust risers replaced in 2010 and since then, although the engine runs smoothly without issues, I am concerned about the oil pressure levels. At idle straight from cold the oil pressure needle is the near the top of the gauge and on the few occasions (I use the boat on the Thames) I have increased the revs on the engine past 1500 the needle goes that little bit further, pretty much to the last marker on the gauge.

I have been told by my existing mechanic who has spent time investigating that it is nothing to worry about and may be down to a faulty oil pressure sensor / gauge. I am dubious because the needle is so consistent in its readings - moreover I am nervous to now take the boat downstream to the tidal thames in case of being left powerless with a blown engine.

Any thoughts and certainly recommendations on a respected Mercruiser service engineer certainly welcome! Thank you!

pm forumite col - excellent engineer, based in reading.

 

[Portland Billy]

Mercruiser

Guy at Val Wyatts at Wargrave - or used to be a few years back.

 

[neale]

I would be grateful for any help - I have a 20 foot sports cuddy with a 4.2l Mercruiser and would appreciate the benefit of your collective experience to recommend a well established Mercruiser engine service specialist.

I had the exhaust risers replaced in 2010 and since then, although the engine runs smoothly without issues, I am concerned about the oil pressure levels. At idle straight from cold the oil pressure needle is the near the top of the gauge and on the few occasions (I use the boat on the Thames) I have increased the revs on the engine past 1500 the needle goes that little bit further, pretty much to the last marker on the gauge.

I have been told by my existing mechanic who has spent time investigating that it is nothing to worry about and may be down to a faulty oil pressure sensor / gauge. I am dubious because the needle is so consistent in its readings - moreover I am nervous to now take the boat downstream to the tidal thames in case of being left powerless with a blown engine.

Any thoughts and certainly recommendations on a respected Mercruiser service engineer certainly welcome! Thank you!

Did you have the oil changed at the same time? Could be something simple like the wrong viscosity oil or a blocked oil filter. What did the gauge read before?

I think for the little cost, I would start with an oil and filter change using the correct products. Then I would look at the sender unit.