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  1. K

    1989 Merc 3.7 3.0. Need help remember part number

    I need to purchase an impeller again 2 years mark I need to remember who to look up mine Alpha 1 Gen one from what I remember but I need to find the part number for that
  2. K

    1989 Merccruiser 3.7 CLY Head leak ?

    So I started the boat today shot a little starter fluid and she started up and then I heard a noise and exhaust noise and I said what the hell is that. Well upon looking a little bit closer, I noticed a leak that looks to be like a freeze plug, I may be wrong. Now I’m just looking for some...
  3. K

    Prop size 1989, Mark cruiser, 3.7,18.9

    I am trying to figure out when I bought this boat a while ago if I actually bought it with the correct prop size I have a 1989 regal medallion wonderful boat. It was in storage for like 20 years. It’s running fantastic but I’m just curious what is the proper propeller size for this boat right...
  4. K

    Engine compression question

    I have a 1989, 3.7 MerCruiser the infamous 470. Apparently I’m not 100% sure. I ran a compression test because I’m having this seasonal issue with carburetor’s. I’m on my third one all rebuilt several times because of stalling issues after running for about 60 seconds. No this seems to have...
  5. K

    No spark after points change

    1989, MerCruiser 3.74 cylinder. So I’m trying to remember because it’s been a while, but the engine was running a bit rough, and I ended up changing two carburetors that was just rebuilt by me and we’re running fine last year. So I said all right let me check the points which looked a little...
  6. K

    Electronic fuel pump.

    So last year I was having problems and I think I narrowed it down to the fuel pump. I heard a lot of these just last year or two on the cheaper brands. So I figured I’d get an electronic fuel pump. So what I did was I set it up with an oil pressure switch one to the relay on the left side and...
  7. K

    Carburetor Compatibility Merc 2bbl 3.0 for my 3.7

    Carburetor compatibility with 1989 MerCruiser 3.7. I have many posts of problems for the past year and I feel like going to buy a new carburetor and I could resolve it once and for all. I am going to buy a new used Mecrusier 3.0 2bbl carb will it be OK on my 3.7 470? will it be enough? I am...
  8. K

    Ordering Throttle cable for replacement

    So, I'm thinking of changing my throttle cable because my shifter seems to be extremely stiff and it makes it difficult when docking the boat. The first thing I am going to do is take my throttle shifter apart and check if it's dried out and it's just a grease problem, but if it isn't and I'm...
  9. K

    Gear position problem after impeller change

    I hope someone can help me after 4 hours of aggravation now 1st so you all know I have done an impeller twice already on this boat. So this is why I'm coming to you guys for help also , when I started up the boat last week I put it in forward any reverse and it was perfect I just wanted to make...
  10. K

    Rug glue question

    I am replacing my rug and I am at a lost for the best glue. I see some stuff at home Depot and other at the same price on amazon My question is since the carpet has a rubber or vinyl backing does that make a difference. The 2 are Roberts 6700-1 1 Gallon Indoor/Outdoor Carpet/Artificial Turf...
  11. K

    2 bbl carb issue on acceleration

    I have a 1989 three point 7 mercruiser 2 barrel carburetor. Last week I made some adjustments on the points and the mixture settings to get a better idle out of the boat. Now the idle is perfect and where it should be .The new problem is when you come out of an idle and put it in gear, if you...
  12. K

    Lower end rattle in Neutral only above 1500 rpm

    1989 37 merc So yesterday I noticed when I lifted up my outdrive that if you rev it 1200 to 15000 only NOT at idle this up there is a rattle click noise as if it's trying to get in gear, but the prop is not spinning. When you switch from reverse to neutral and then into forward it locks in...
  13. K

    89 3.7 merc bow rider / barley idles

    Looking for some guidance diesel one of the repairs that just aggravate me because it could be so many different things. So Saturday I took the boat out it was OK in the beginning I noticed a little bit of skipping but it seem to clear itself out and everything went well. Today I took the boat...
  14. K

    Re-carpeting 18.5 Bowrider Need advice

    I have a 1989. 18.5 regal bowrider and I plan on putting in new carpeting. Basically the carpeting is original. The water is seeping through, causing two soft spots. I guess my question is, what is the best way? to carpet a boat I'm buying 8 1/2 foot wide carpeting. So obviously it's not gonna...
  15. K

    Fuel gauge issues

    Can some one tell me what these connection do? 1989 Regal Bow rider 3.7 I'm trying to figure out if I have a ground issue or a gauge issue basically what's going on now is I bought a fuel sending unit the new type that has the sending unit slide up and down this metal post I'll call it. No...
  16. K

    Temperature gauge needle when cold

    Temperature gauge needle when cold is well below the C. This indicates inaccurate read Because the starting point is way too under the C. I’m gonna attach a picture because after the boat runs for about 4 to 5 minutes it finally reaches the first notch next to the C. I’m just concerned because I...
  17. K

    Prop Pitch questions

    1989 regal 18.5 Medallion bowrider 3.7LX Merc I think it's the four 470 engine, the serial is 0C520320 Spare prop question. I have a great deal for $40 on a brand-new prop never used and I plan on buying it as a spare but I want to make sure it'll be OK. Now I do know that depending on the...
  18. K

    Understanding Merc Manifolds 3.7

    Trying to understand exhaust elbows the top picture is going to show my current exhaust. Today I picked up a spare elbow and I'm wondering as far as the grooves are concerned and the gaskets, why do they not match up? For instance a gasket will have three slots but the manifold will have four...
  19. K

    Antifreeze low after sitting 2 week

    So I went to winterize my boat and I noticed as in the past the antifreeze was a little low and this has been a summertime issue after replacing the head gasket exhaust gasket the intake gasket and exhaust riser gasket . Every time I start up the boat you can clearly see the antifreeze shooting...
  20. K

    Possible oil leak near fuel pump bolt

    I have an 89 MerCruiser 3.7 that sat for a long time I’ve put quite a few posts up here to bring them back to life. So I decided to change the fuel pump thinking that diaphragm is got to be worn out why not. Well when I was installing the new one obviously. I had tighten the bolts and when I...
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